.gitignore

@@ -158,5 +158,3 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
-Session.vim
-Data/stocklog.csv

Exercises/ex1_1.md

@@ -39,7 +39,7 @@ chars = '\|/'
 
 def draw(rows, columns):
     for r in rows:
-        print(''.join(random.choice(chars) for _ in range(columns)))
+    	print(''.join(random.choice(chars) for _ in range(columns)))
 
 if __name__ == '__main__':
     if len(sys.argv) != 3:

Exercises/ex2_2.md

@@ -35,7 +35,7 @@ def read_portfolio(filename):
                 'name' : row[0],
                 'shares' : int(row[1]),
                 'price' : float(row[2])
-            }
+                }
             portfolio.append(record)
     return portfolio
 ```

Exercises/ex2_3.md

@@ -220,7 +220,7 @@ Watch what happens if you do the for-loop again:
 
 ```python
 >>> for n in squares:
-        print(n)
+         print(n)
 
 >>>
 ```
@@ -291,7 +291,7 @@ False
 >>>
 ```
 
-Here is a subtle use of a generator expression in making comma
+Here is an subtle use of a generator expression in making comma
 separated values:
 
 ```python

Exercises/ex2_5.md

@@ -175,7 +175,7 @@ function.
 
 import collections
 ...
-class RideData(collections.abc.Sequence):
+class RideData(collections.Sequence):
     def __init__(self):
         self.routes = []      # Columns
         self.dates = []
@@ -204,7 +204,7 @@ into 4 separate `append()` operations.
 # readrides.py
 ...
 
-class RideData(collections.abc.Sequence):
+class RideData(collections.Sequence):
     def __init__(self):
         # Each value is a list with all of the values (a column)
         self.routes = []

Exercises/ex7_1.md

@@ -4,11 +4,11 @@
 
 *Objectives:*
 
-- Learn how to define simple decorator functions.
+- Learn how to define a simple decorator functions.
 
 *Files Created:* `logcall.py`
 
-*Files Modified:* `validate.py`
+*Files Modifie:* `validate.py`
 
 ## (a) Your First Decorator
 

Exercises/ex9_4.md

@@ -41,7 +41,7 @@ def create_formatter(name, column_formats=None, upper_headers=False):
 
     if column_formats:
         class formatter_cls(ColumnFormatMixin, formatter_cls):
-            formats = column_formats
+              formats = column_formats
 
     if upper_headers:
         class formatter_cls(UpperHeadersMixin, formatter_cls):
@@ -139,7 +139,7 @@ def create_formatter(name, column_formats=None, upper_headers=False):
 
     if column_formats:
         class formatter_cls(ColumnFormatMixin, formatter_cls):
-            formats = column_formats
+              formats = column_formats
 
     if upper_headers:
         class formatter_cls(UpperHeadersMixin, formatter_cls):

Exercises/soln2_5.md

@@ -93,7 +93,7 @@ def read_rides_as_columns(filename):
 # The great "fake"
 
 import collections
-class RideData(collections.abc.Sequence):
+class RideData(collections.Sequence):
     def __init__(self):
         # Each value is a list with all of the values (a column)
         self.routes = []

README.md

@@ -10,7 +10,7 @@ battle-tested several hundred times on the corporate-training circuit
 for more than a decade.  Written by David Beazley, author of the
 Python Cookbook, 3rd Edition (O'Reilly) and Python Distilled
 (Addison-Wesley).  Released under a Creative Commons license.  Free of
-ads, tracking, pop-ups, newsletters, and AI.
+ads, tracking, pop-ups, newletters, and AI.
 
 ## Target Audience 
 
@@ -94,32 +94,13 @@ exercises.
 
 **A:** You can use [GitHub discussions](https://github.com/dabeaz-course/python-mastery/discussions) to discuss the course.
 
-**Q: Why wasn't topic/tool/library X covered?**
+**Q: What wasn't topic/tool/library X covered?**
 
 **A:** The course was designed to be completed in an intense 4-day
 in-person format. It simply isn't possible to cover absolutely
 everything.  As such, the course is focused primarily on the core
 Python language, not third party libraries or tooling.
 
-**Q: Why aren't features like typing, async, or pattern matching covered?**
-
-**A:** Mainly, it's an issue of calendar timing and scope.  Course
-material was primarily developed pre-pandemic and represents Python as
-it was at that time. Some topics (e.g., typing or async) are
-sufficiently complex that they would be better covered on their own
-in a separate course.
-
-**Q: Why did you release the course?**
-
-**A:** This course was extensively taught pre-pandemic. Post-pandemic,
-my teaching has shifted towards projects and CS fundamentals.
-However, why let a good course just languish on my computer? 
-
-**Q: How can I help?**
-
-**A:** If you like the course, the best way to support it is to tell
-other people about it.
-
 ----
 `>>>` Advanced Python Mastery  
 `...` A course by [dabeaz](https://www.dabeaz.com)  

Solutions/1_1/art.py

@@ -7,7 +7,7 @@ chars = '\|/'
 
 def draw(rows, columns):
     for r in range(rows):
-        print(''.join(random.choice(chars) for _ in range(columns)))
+    	print(''.join(random.choice(chars) for _ in range(columns)))
 
 if __name__ == '__main__':
     if len(sys.argv) != 3:

Solutions/2_5/readrides.py

@@ -88,7 +88,7 @@ def read_rides_as_columns(filename):
 # The great "fake"
 
 import collections
-class RideData(collections.abc.Sequence):
+class RideData(collections.Sequence):
     def __init__(self):
         # Each value is a list with all of the values (a column)
         self.routes = []

Solutions/2_6/colreader.py

@@ -3,7 +3,7 @@
 import collections
 import csv
 
-class DataCollection(collections.abc.Sequence):
+class DataCollection(collections.Sequence):
     def __init__(self, columns):
         self.column_names = list(columns)
         self.column_data = list(columns.values())
@@ -34,3 +34,4 @@ if __name__ == '__main__':
     tracemalloc.start()
     data = read_csv_as_columns('../../Data/ctabus.csv', [intern, intern, intern, int])
     print(tracemalloc.get_traced_memory())
+

art.py

@@ -1,16 +0,0 @@
-
-# art.py
-
-import sys
-import random
-
-chars = '\|/'
-
-def draw(rows, columns):
-    for r in range(rows):
-        print(''.join(random.choice(chars) for _ in range(columns)))
-
-if __name__ == '__main__':
-    if len(sys.argv) != 3:
-        raise SystemExit("Usage: art.py rows columns")
-    draw(int(sys.argv[1]), int(sys.argv[2]))

cofollow.py

@@ -1,43 +0,0 @@
-import os
-import time
-from functools import wraps
-
-
-def follow(filename, target):
-    with open(filename, 'r') as f:
-        f.seek(0, os.SEEK_END)
-        while True:
-            line = f.readline()
-            if line != '':
-                target.send(line)
-            else:
-                time.sleep(0.1)
-
-
-def consumer(func):
-    @wraps(func)
-    def start(*args, **kwargs):
-        f = func(*args, **kwargs)
-        f.send(None)
-        return f
-    return start
-
-
-@consumer
-def printer():
-    while True:
-        try:
-            item = yield
-            print(item)
-        except Exception as e:
-            print(f'ERROR: {repr(e)}')
-
-
-def receive(expected_type):
-    msg = yield
-    assert isinstance(msg, expected_type), f'Expected type {expected_type}'
-    return msg
-
-
-if __name__ == '__main__':
-    follow('Data/stocklog.csv', printer())

coticker.py

@@ -1,57 +0,0 @@
-import csv
-
-from cofollow import consumer, receive
-from tableformat import create_formatter
-from ticker import Ticker
-
-
-@consumer
-def to_csv(target):
-    def producer():
-        while True:
-            yield line
-
-    reader = csv.reader(producer())
-    while True:
-        line = yield from receive(str)
-        target.send(next(reader))
-
-
-@consumer
-def create_ticker(target):
-    while True:
-        row = yield from receive(list)
-        target.send(Ticker.from_row(row))
-
-
-@consumer
-def negchange(target):
-    while True:
-        record = yield from receive(Ticker)
-        if record.change < 0:
-            target.send(record)
-
-
-@consumer
-def ticker(fmt, fields):
-    formatter = create_formatter(fmt)
-    formatter.headings(fields)
-    while True:
-        rec = yield from receive(Ticker)
-        row = [getattr(rec, name) for name in fields]
-        formatter.row(row)
-
-
-if __name__ == '__main__':
-    from cofollow import follow
-
-    follow(
-        'Data/stocklog.csv',
-        to_csv(
-            create_ticker(
-                negchange(
-                    ticker('text', ['name', 'price', 'change'])
-                )
-            )
-        )
-    )

descrip.py

@@ -1,12 +0,0 @@
-class Descriptor:
-    def __init__(self, name):
-        self.name = name
-
-    def __get__(self, instance, cls):
-        print(f"{self.name}:__get__")
-
-    def __set__(self, instance, value):
-        print(f"{self.name}:__set__ {value}")
-
-    def __delete__(self, instance):
-        print(f"{self.name}:__delete__")

ex22.py

@@ -1,69 +0,0 @@
-from collections import Counter, defaultdict
-from pprint import pprint
-
-from readrides import read_rides, row_to_dataclass
-
-
-def count_routes(data):
-    return len({row.route for row in data})
-
-
-def rider_count(data, date=None, route=None):
-    if date and not isinstance(date, tuple):
-        date = (date,)
-    if route and isinstance(route, tuple):
-        route = (route,)
-
-    def _filterfunc(row):
-        if (date and row.date not in date):
-            return False
-        if (route and row.route not in route):
-            return False
-        return True
-
-    return sum(row.rides for row in data if _filterfunc(row))
-
-
-def rides_per_route(data):
-    ride_counts = Counter()
-    for row in data:
-        ride_counts[row.route] += row.rides
-    return dict(ride_counts)
-
-
-def ten_year_increase(data):
-    ridership = defaultdict(Counter)
-    routes = defaultdict(set)
-    for row in data:
-        if '/2001' in row.date:
-            year = 2001
-        elif '/2011' in row.date:
-            year = 2011
-        else:
-            continue
-        ridership[year][row.route] += row.rides
-        routes[year].add(row.route)
-    increases = Counter()
-    for route in (routes[2001] & routes[2011]):
-        difference = ridership[2011][route] - ridership[2001][route]
-        if difference >= 0:
-            increases[route] = difference
-    return increases
-
-
-if __name__ == '__main__':
-    filename = 'Data/ctabus.csv'
-    data = read_rides(filename, row_to_dataclass)
-
-    print("Number of bus routes: ", count_routes(data))
-    print("Ridership count, 22 bus on 2/2/2011:",
-          rider_count(data, date='02/02/2011', route='22'))
-    print("Total Ridership Per Route:")
-    print("    Route | Ridership")
-    print("   -------+-----------")
-    total_ridership = rides_per_route(data)
-    for route in sorted(total_ridership.keys()):
-        rides = total_ridership[route]
-        print(f"    {route:>5} | {rides}")
-    print("Route ridership increases, 2001 - 2011")
-    pprint(ten_year_increase(data).most_common(5))

ex35.py

@@ -1,7 +0,0 @@
-import reader
-import stock
-import tableformat
-
-portfolio = reader.read_csv_as_instances("Data/portfolio.csv", stock.Stock)
-formatter = tableformat.create_formatter("text")
-tableformat.print_table(portfolio, ["name", "shares", "price"], formatter)

ex5.5.py

@@ -1,6 +0,0 @@
-import logging
-
-from reader import read_csv_as_dicts
-
-logging.basicConfig(level=logging.DEBUG)
-port = read_csv_as_dicts("Data/missing.csv", types=[str, int, float])

follow.py

@@ -1,26 +0,0 @@
-import os
-import time
-
-
-def follow(filename):
-    try:
-        with open(filename, 'r') as f:
-            f.seek(0, os.SEEK_END)
-            while True:
-                line = f.readline()
-                if line == '':
-                    time.sleep(0.1)
-                    continue
-                yield line
-    except GeneratorExit:
-        print('Following Done')
-
-
-if __name__ == '__main__':
-    for line in follow('Data/stocklog.csv'):
-        fields = line.split(',')
-        name = fields[0].strip('"')
-        price = float(fields[1])
-        change = float(fields[4])
-        if change < 0:
-            print(f"{name:s} {price:10.2f} {change:10.2f}")

logcall.py

@@ -1,27 +0,0 @@
-from functools import wraps
-
-
-def logformat(message="Calling {name}"):
-    def logged(func):
-        print(f'Adding logging to {func.__name__}')
-
-        @wraps(func)
-        def wrapper(*args, **kwargs):
-            fmtargs=dict(
-                name=func.__name__,
-                func=func,
-            )
-            print(message.format(**fmtargs))
-            return func(*args, **kwargs)
-        return wrapper
-    return logged
-
-
-logged = logformat()
-
-
-if __name__ == '__main__':
-    @logged
-    def add(x: int, y: int):
-        """Adds two numbers."""
-        return x + y

multitask.py

@@ -1,33 +0,0 @@
-from collections import deque
-
-tasks = deque()
-def run():
-    while tasks:
-        task = tasks.popleft()
-        try:
-            task.send(None)
-            tasks.append(task)
-        except StopIteration:
-            print('Task done')
-
-
-def countdown(n):
-    while n > 0:
-        print('T-minus', n)
-        yield
-        n -= 1
-
-
-def countup(n):
-    x = 0
-    while x < n:
-        print('Up we go', x)
-        yield
-        x += 1
-
-
-if __name__ == '__main__':
-    tasks.append(countdown(10))
-    tasks.append(countdown(5))
-    tasks.append(countup(20))
-    run()

mutint.py

@@ -1,50 +0,0 @@
-from functools import total_ordering
-
-
-@total_ordering
-class MutInt:
-    __slots__ = ['value']
-
-    def __init__(self, value):
-        self.value = value
-
-    def __str__(self):
-        return str(self.value)
-
-    def __repr__(self):
-        return f'MutInt({self.value!r})'
-
-    def __format__(self, fmt):
-        return format(self.value, fmt)
-
-    def __add__(self, other):
-        if isinstance(other, MutInt):
-            return MutInt(self.value + other.value)
-        elif isinstance(other, int):
-            return MutInt(self.value + other)
-        else:
-            return NotImplemented
-
-    def __eq__(self, other):
-        if isinstance(other, MutInt):
-            return self.value == other.value
-        elif isinstance(other, int):
-            return self.value == other
-        else:
-            return NotImplemented
-
-    def __lt__(self, other):
-        if isinstance(other, MutInt):
-            return self.value < other.value
-        elif isinstance(other, int):
-            return self.value < other
-        else:
-            return NotImplemented
-
-    def __int__(self):
-        return self.value
-
-    def __float__(self):
-        return float(self.value)
-
-    __index__ = __int__

mymeta.py

@@ -1,24 +0,0 @@
-class mytype(type):
-    @staticmethod
-    def __new__(meta, name, bases, __dict__):
-        print('Creating class :', name)
-        print('Base classes   :', bases)
-        print('Attributes     :', list(__dict__))
-        return super().__new__(meta, name, bases, __dict__)
-
-
-class myobject(metaclass=mytype):
-    pass
-
-
-class Stock(myobject):
-    def __init__(self, name, shares, price):
-        self.name = name
-        self.shares = shares
-        self.price = price
-
-    def cost(self):
-        return self.shares * self.price
-
-    def sell(self, nshares):
-        self.shares -= nshares

pcost.py

@@ -1,19 +0,0 @@
-
-def portfolio_cost(filename: str) -> float:
-    with open(filename, 'r') as lines:
-        total = 0.0
-        for line in lines:
-            _, count, price = line.split()
-            try:
-                count = int(count)
-                price = float(price)
-                total += count * price
-            except ValueError as ex:
-                print(f"Couldn't parse {line!r}. Reason: {ex!r}")
-    return total
-
-
-if __name__ == '__main__':
-    filename = 'Data/portfolio.dat'
-    value = portfolio_cost(filename)
-    print(f"value = {value}")

reader_classes.py

@@ -1,87 +0,0 @@
-import collections.abc
-import csv
-from abc import ABC, abstractmethod
-
-
-class DataCollection(collections.abc.Sequence):
-    def __init__(self, headers):
-        self.headers = headers
-        self.data = dict()
-        for name in headers:
-            self.data[name] = []
-
-    def __len__(self):
-        return len(self.data[self.headers[0]])
-
-    def __getitem__(self, index):
-        if isinstance(index, slice):
-            value = DataCollection(self.headers)
-        else:
-            value = {}
-
-        for name in self.headers:
-            if isinstance(index, slice):
-                value.data[name] = self.data[name][index]
-            else:
-                value[name] = self.data[name][index]
-        return value
-
-    def append(self, d):
-        for name in self.headers:
-            self.data[name].append(d[name])
-
-
-class CSVParser(ABC):
-    def parse(self, filename):
-        records = []
-        with open(filename) as f:
-            rows = csv.reader(f)
-            headers = next(rows)
-            for row in rows:
-                records.append(self.make_record(headers, row))
-        return records
-
-    @abstractmethod
-    def make_record(self, headers, row):
-        pass
-
-
-class DictCSVParser(CSVParser):
-    def __init__(self, types):
-        self.types = types
-
-    def make_record(self, headers, row):
-        return {name: func(val) for name, func, val in zip(headers, self.types, row)}
-
-
-class InstanceCSVParser(CSVParser):
-    def __init__(self, cl):
-        self.cls = cl
-
-    def make_record(self, headers, row):
-        return self.cls.from_row(row)
-
-
-def read_csv_as_dicts(filename, conversions):
-    parser = DictCSVParser(conversions)
-    records = parser.parse(filename)
-    return records
-
-
-def read_csv_as_instances(filename, cls):
-    """Read a CSV file into a list of instances"""
-    parser = InstanceCSVParser(cls)
-    records = parser.parse(filename)
-    return records
-
-
-def read_csv_as_columns(filename, conversions):
-    with open(filename) as f:
-        rows = csv.reader(f)
-        headers = next(rows)
-        value = DataCollection(headers)
-        for row in rows:
-            value.append(
-                {name: func(val) for name, func, val in zip(headers, conversions, row)}
-            )
-    return value

readport.py

@@ -1,16 +0,0 @@
-import csv
-
-
-def read_portfolio(filename):
-    portfolio = []
-    with open(filename) as f:
-        rows = csv.reader(f)
-        _ = next(rows)
-        for row in rows:
-            record = {
-                'name': row[0],
-                'shares': int(row[1]),
-                'price': float(row[2])
-            }
-            portfolio.append(record)
-    return portfolio

readrides.py

@@ -1,156 +0,0 @@
-import collections
-import csv
-from collections import namedtuple
-from dataclasses import dataclass
-
-
-@dataclass
-class DataClassRow:
-    __slots__ = ['route', 'date', 'daytype', 'rides']
-    route: str
-    date: str
-    daytype: str
-    rides: int
-
-
-class BasicRow:
-    def __init__(self, route, date, daytype, rides):
-        self.route = route
-        self.date = date
-        self.daytype = daytype
-        self.rides = rides
-
-
-class SlotsRow:
-    __slots__ = ['route', 'date', 'daytype', 'rides']
-
-    def __init__(self, route, date, daytype, rides):
-        self.route = route
-        self.date = date
-        self.daytype = daytype
-        self.rides = rides
-
-
-TupleRow = namedtuple('Row', ['route', 'date', 'daytype', 'rides'])
-
-
-def read_rides(filename, readfunc):
-    """Read the bus ride data using a conversion function."""
-    with open(filename) as f:
-        rows = csv.reader(f)
-        next(rows)
-        return [readfunc(row) for row in rows]
-
-
-def read_rides_as_tuples(filename):
-    return read_rides(filename, row_to_tuple)
-
-
-def read_rides_as_dicts(filename):
-    return read_rides(filename, row_to_dict)
-
-
-def read_rides_as_namedtuples(filename):
-    return read_rides(filename, row_to_namedtuple)
-
-
-def read_rides_as_classes(filename):
-    return read_rides(filename, row_to_class)
-
-
-def read_rides_as_slotsclasses(filename):
-    return read_rides(filename, row_to_slotsclass)
-
-
-def read_rides_as_dataclasses(filename):
-    return read_rides(filename, row_to_dataclass)
-
-
-class RideData(collections.abc.Sequence):
-    def __init__(self):
-        self.routes = []
-        self.dates = []
-        self.daytypes = []
-        self.numrides = []
-
-    def __len__(self):
-        return len(self.routes)
-
-    def __getitem__(self, index):
-        if not isinstance(index, slice):
-            return dict(route=self.routes[index],
-                        date=self.dates[index],
-                        daytype=self.daytypes[index],
-                        rides=self.numrides[index])
-        value = RideData()
-        value.routes = self.routes[index]
-        value.dates = self.dates[index]
-        value.daytypes = self.daytypes[index]
-        value.numrides = self.numrides[index]
-        return value
-
-    def append(self, d):
-        self.routes.append(d['route'])
-        self.dates.append(d['date'])
-        self.daytypes.append(d['daytype'])
-        self.numrides.append(d['rides'])
-
-
-def read_rides_as_columns(filename):
-    """Read the bus ride data into 4 lists, one per column."""
-    data = RideData()
-    with open(filename) as f:
-        rows = csv.reader(f)
-        next(rows)
-        for row in rows:
-            data.append(dict(route=row[0],
-                             date=row[1],
-                             daytype=row[2],
-                             rides=int(row[3])))
-    return data
-
-
-def row_to_tuple(row):
-    return (row[0], row[1], row[2], int(row[3]))
-
-
-def row_to_dict(row):
-    return dict(route=row[0], date=row[1], daytype=row[2], rides=int(row[3]))
-
-
-def row_to_namedtuple(row):
-    return TupleRow(row[0], row[1], row[2], int(row[3]))
-
-
-def row_to_class(row):
-    return BasicRow(row[0], row[1], row[2], int(row[3]))
-
-
-def row_to_slotsclass(row):
-    return SlotsRow(row[0], row[1], row[2], int(row[3]))
-
-
-def row_to_dataclass(row):
-    return DataClassRow(route=row[0], date=row[1],
-                        daytype=row[2], rides=int(row[3]))
-
-
-if __name__ == '__main__':
-    import sys
-    import tracemalloc
-    method = sys.argv[1]
-    methods = {
-        'tuple': row_to_tuple,
-        'dict': row_to_dict,
-        'namedtuple': row_to_namedtuple,
-        'class': row_to_class,
-        'slots': row_to_slotsclass,
-        'dataclass': row_to_dataclass,
-    }
-    if method not in methods:
-        print("unknown method")
-        sys.exit(-1)
-    tracemalloc.start()
-    rows = read_rides('Data/ctabus.csv', methods[method])
-    print('Memory Use: Current %d, Peak %d;' % tracemalloc.get_traced_memory(),
-          'Method:', method)

readrides_data.sh

@@ -1,5 +0,0 @@
-#!/bin/bash
-
-for method in tuple dict namedtuple class slots dataclass; do
-    time python readrides.py $method
-done

sample.py

@@ -1,37 +0,0 @@
-from logcall import logformat, logged
-
-
-@logged
-def add(x, y):
-    return x + y
-
-
-@logged
-def sub(x, y):
-    return x - y
-
-
-@logformat('{func.__code__.co_filename}:{func.__name__}')
-def mult(x, y):
-    return x * y
-
-
-class Spam:
-    @logged
-    def instance_method(self):
-        pass
-
-    @classmethod
-    @logged
-    def class_method(cls):
-        pass
-
-    @staticmethod
-    @logged
-    def static_method():
-        pass
-
-    @property
-    @logged
-    def property_method(self):
-        pass

server.py

@@ -1,78 +0,0 @@
-from collections import deque
-from select import select
-from socket import AF_INET, SO_REUSEADDR, SOCK_STREAM, SOL_SOCKET, socket
-from types import coroutine
-
-tasks = deque()
-recv_wait = {}
-send_wait = {}
-
-
-def run():
-    while any([tasks, recv_wait, send_wait]):
-        while not tasks:
-            can_recv, can_send, _ = select(recv_wait, send_wait, [])
-            for s in can_recv:
-                tasks.append(recv_wait.pop(s))
-            for s in can_send:
-                tasks.append(send_wait.pop(s))
-        task = tasks.popleft()
-        try:
-            reason, resource = task.send(None)
-            if reason == 'recv':
-                recv_wait[resource] = task
-            elif reason == 'send':
-                send_wait[resource] = task
-            else:
-                raise RuntimeError(f'Unknown reason {reason}')
-        except StopIteration:
-            print('Task done')
-
-
-class GenSocket:
-    def __init__(self, sock):
-        self.sock = sock
-
-    @coroutine
-    def accept(self):
-        yield 'recv', self.sock
-        client, addr = self.sock.accept()
-        return GenSocket(client), addr
-
-    @coroutine
-    def recv(self, maxsize):
-        yield 'recv', self.sock
-        return self.sock.recv(maxsize)
-
-    @coroutine
-    def send(self, data):
-        yield 'send', self.sock
-        return self.sock.send(data)
-
-    def __getattr__(self, name):
-        return getattr(self.sock, name)
-
-
-async def tcp_server(address, handler):
-    sock = GenSocket(socket(AF_INET, SOCK_STREAM))
-    sock.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
-    sock.bind(address)
-    sock.listen(5)
-    while True:
-        client, addr = await sock.accept()
-        tasks.append(handler(client, addr))
-
-
-async def echo_handler(client, address):
-    print('Connection from', address)
-    while True:
-        data = await client.recv(1000)
-        if not data:
-            break
-        await client.send(b'GOT: ' + data)
-    print('Connection closed')
-
-
-if __name__ == '__main__':
-    tasks.append(tcp_server(('', 25000), echo_handler))
-    run()

simplemod.py

@@ -1,13 +0,0 @@
-x = 42
-
-
-def foo():
-    print('x is', x)
-
-
-class Spam:
-    def yow(self):
-        print('Yow!')
-
-
-print('loaded simplemod')

stock.py

@@ -1,27 +0,0 @@
-from structly import *
-
-
-class Stock(Structure):
-    _types = ()
-    name = String()
-    shares = PositiveInteger()
-    price = PositiveFloat()
-
-    @property
-    def cost(self):
-        return self.shares * self.price
-
-    def sell(self, nshares: PositiveInteger):
-        self.shares -= nshares
-
-    @classmethod
-    def from_row(cls, row):
-        rowdata = [func(val) for func, val in zip(cls._types, row)]
-        return cls(*rowdata)
-
-
-if __name__ == '__main__':
-
-    portfolio = read_csv_as_instances('Data/portfolio.csv', Stock)
-    formatter = create_formatter('text')
-    print_table(portfolio, ['name', 'shares', 'price'], formatter)

structly/__init__.py

@@ -1,9 +0,0 @@
-from .reader import *
-from .structure import *
-from .tableformat import *
-
-__all__ = [
-    *structure.__all__,
-    *reader.__all__,
-    *tableformat.__all__
-]

structly/reader.py

@@ -1,64 +0,0 @@
-import csv
-import logging
-from typing import Any, Callable, Iterable, Mapping, Optional, Sequence
-
-__all__ = ['read_csv_as_dicts', 'read_csv_as_instances']
-
-
-def convert_csv(
-    lines: Iterable[str],
-    conv: Callable[[Sequence[Any], Sequence[str]], Any],
-    headers: Optional[Sequence[str]] = None,
-) -> Sequence[Any]:
-    rows = csv.reader(lines)
-    if headers is None:
-        headers = next(rows)
-    records = []
-    for n, row in enumerate(rows):
-        try:
-            records.append(conv(row, headers))
-        except ValueError as ex:
-            log = logging.getLogger(__name__)
-            log.warning(f"Row {n}: bad row: {row}")
-            log.debug(f"Reason: {ex}")
-
-    return records
-
-
-def csv_as_dicts(
-    lines: Iterable[str], types: Sequence[type],
-    headers: Optional[Sequence[str]] = None
-) -> Sequence[Mapping[str, Any]]:
-    """Parse CSV lines into a list of dictionaries."""
-
-    def _conv(row, hdrs):
-        return {name: func(val) for name, func, val in zip(hdrs, types, row)}
-
-    return convert_csv(lines, _conv, headers)
-
-
-def read_csv_as_dicts(
-    filename: str, types: Sequence[type], headers: Optional[Sequence[str]] = None
-) -> Sequence[Mapping[str, Any]]:
-    """
-    Read CSV data into list of dictionaries with optional type conversion.
-    """
-    with open(filename) as file:
-        return csv_as_dicts(file, types, headers)
-
-
-def csv_as_instances(
-    lines: Iterable[str], cls: type, headers: Optional[Sequence[str]] = None
-) -> Sequence[Any]:
-    """Parse CSV lines into a list of of class instances."""
-    return convert_csv(lines, lambda row, _: cls.from_row(row), headers)
-
-
-def read_csv_as_instances(
-    filename: str, cls: type, has_headers: bool = True
-) -> Sequence[Any]:
-    """
-    Read CSV data into list of instances.
-    """
-    with open(filename) as file:
-        return csv_as_instances(file, cls, has_headers)

structly/structure.py

@@ -1,72 +0,0 @@
-from collections import ChainMap
-
-from .validate import Validator, validated
-
-__all__ = ['Structure']
-
-
-def validate_attributes(cls):
-    validators = []
-    for name, val in vars(cls).items():
-        if isinstance(val, Validator):
-            validators.append(val)
-        elif callable(val) and val.__annotations__:
-            setattr(cls, name, validated(val))
-    cls._fields = tuple(v.name for v in validators)
-    cls._types = tuple(getattr(v, 'expected_type', lambda x: x) for v in validators)
-    if cls._fields:
-        cls.create_init()
-    return cls
-
-
-class StructureMeta(type):
-    @classmethod
-    def __prepare__(meta, clsname, bases):
-        return ChainMap({}, Validator.validators)
-
-    @staticmethod
-    def __new__(meta, name, bases, methods):
-        methods = methods.maps[0]
-        return super().__new__(meta, name, bases, methods)
-
-
-class Structure(metaclass=StructureMeta):
-    _fields = ()
-
-    def __init_subclass__(cls):
-        validate_attributes(cls)
-
-    def __repr__(self):
-        args = map(lambda field: f"{getattr(self, field)!r}", self._fields)
-        return f"{type(self).__name__}({', '.join(args)})"
-
-    def __setattr__(self, name, value):
-        if name in self._fields or name[0] == '_':
-            super().__setattr__(name, value)
-        else:
-            raise AttributeError(f"No attribute {name}")
-
-    def __iter__(self):
-        for name in self._fields:
-            yield getattr(self, name)
-
-    def __eq__(self, other):
-        return isinstance(other, type(self)) and tuple(self) == tuple(other)
-
-    @classmethod
-    def create_init(cls):
-        code = f'def __init__(self, {", ".join(cls._fields)}):\n'
-        for name in cls._fields:
-            code += f'    self.{name} = {name}\n'
-        locs = {}
-        exec(code, locs)
-        cls.__init__ = locs['__init__']
-
-    @classmethod
-    def from_row(cls, row):
-        return cls(*[func(val) for func, val in zip(cls._types, row)])
-
-
-def typed_structure(clsname, **validators):
-    cls = type(clsname, (Structure,), validators)
-    return cls

structly/tableformat/__init__.py

@@ -1,3 +0,0 @@
-from .formatter import create_formatter, print_table
-
-__all__ = ['create_formatter', 'print_table']

structly/tableformat/csv.py

@@ -1,12 +0,0 @@
-from .formatter import TableFormatter
-
-
-class CSVTableFormatter(TableFormatter):
-    def _printer(self, data):
-        print(",".join(str(value) for value in data))
-
-    def headings(self, headers):
-        return self._printer(headers)
-
-    def row(self, rowdata):
-        return self._printer(rowdata)

structly/tableformat/formatter.py

@@ -1,63 +0,0 @@
-from abc import ABC, abstractmethod
-
-
-class TableFormatter(ABC):
-    _formats = {}
-
-    @classmethod
-    def __init_subclass__(cls):
-        name = cls.__module__.split('.')[-1]
-        TableFormatter._formats[name] = cls
-
-    @abstractmethod
-    def headings(self, headers):
-        pass
-
-    @abstractmethod
-    def row(self, rowdata):
-        pass
-
-
-class ColumnFormatMixin:
-    formats = []
-
-    def row(self, rowdata):
-        rowdata = [(fmt % d) for fmt, d in zip(self.formats, rowdata)]
-        super().row(rowdata)
-
-
-class UpperHeadersMixin:
-    def headings(self, headers):
-        super().headings([h.upper() for h in headers])
-
-
-def create_formatter(name, column_formats=None, upper_headers=False):
-    if not name:
-        raise ValueError(f'formatter named "{name}" not implemented')
-    if name not in TableFormatter._formats:
-        __import__(f'{__package__}.{name}')
-    formatter = TableFormatter._formats.get(name)
-    if not formatter:
-        raise RuntimeError(f'Unknown format {name}')
-
-    if upper_headers:
-        class _UpperFormatter(UpperHeadersMixin, formatter):
-            pass
-
-        formatter = _UpperFormatter
-    if column_formats:
-
-        class _ColumnFormatter(ColumnFormatMixin, formatter):
-            formats = column_formats
-
-        formatter = _ColumnFormatter
-    return formatter()
-
-
-def print_table(records, fields, formatter):
-    if not isinstance(formatter, TableFormatter):
-        raise TypeError("expected a TableFormatter")
-
-    formatter.headings(fields)
-    for record in records:
-        formatter.row([getattr(record, fieldname) for fieldname in fields])

structly/tableformat/html.py

@@ -1,16 +0,0 @@
-from .formatter import TableFormatter
-
-
-class HTMLTableFormatter(TableFormatter):
-    def _cell(self, value, tag):
-        return f"<{tag}>{value}</{tag}>"
-
-    def _printer(self, data, tag):
-        line = f"<tr>{' '.join(self._cell(str(value), tag) for value in data)}</tr>"
-        print(line)
-
-    def headings(self, headers):
-        return self._printer(headers, "th")
-
-    def row(self, rowdata):
-        return self._printer(rowdata, "td")

structly/tableformat/text.py

@@ -1,13 +0,0 @@
-from .formatter import TableFormatter
-
-
-class TextTableFormatter(TableFormatter):
-    def _printer(self, data):
-        print(*("{: >10}".format(value) for value in data))
-
-    def headings(self, headers):
-        self._printer(headers)
-        print(*("{:->10}".format("") for _ in headers))
-
-    def row(self, rowdata):
-        self._printer(rowdata)

structly/validate.py

@@ -1,155 +0,0 @@
-import inspect
-from functools import wraps
-
-
-class Validator:
-    validators = {}
-
-    def __init__(self, name=None):
-        self.name = name
-
-    @classmethod
-    def __init_subclass__(cls):
-        cls.validators[cls.__name__] = cls
-
-    @classmethod
-    def check(cls, value):
-        return value
-
-    def __set__(self, instance, value):
-        instance.__dict__[self.name] = self.check(value)
-
-    def __set_name__(self, cls, name):
-        self.name = name
-
-
-class Typed(Validator):
-    expected_type = object
-
-    @classmethod
-    def check(cls, value):
-        if not isinstance(value, cls.expected_type):
-            raise TypeError(f"expected {cls.expected_type}")
-        return super().check(value)
-
-
-_typed_classes = [
-    ('Integer', int),
-    ('Float', float),
-    ('String', str),
-]
-
-globals().update((name, type(name, (Typed,), {'expected_type': ty}))
-                 for name, ty in _typed_classes)
-
-
-class Positive(Validator):
-    @classmethod
-    def check(cls, value):
-        if value < 0:
-            raise ValueError("Expected >= 0")
-        return super().check(value)
-
-
-class NonEmpty(Validator):
-    @classmethod
-    def check(cls, value):
-        if len(value) == 0:
-            return ValueError("Must be non-empty")
-        return super().check(value)
-
-
-class PositiveInteger(Integer, Positive):
-    pass
-
-
-class PositiveFloat(Float, Positive):
-    pass
-
-
-class NonEmptyString(String, NonEmpty):
-    pass
-
-
-def validated(func):
-    sig = inspect.signature(func)
-    annotations = dict(func.__annotations__)
-    retcheck = annotations.pop('return', None)
-
-    @wraps(func)
-    def wrapper(*args, **kwargs):
-        bound = sig.bind(*args, **kwargs)
-        errors = []
-        for name, validator in annotations.items():
-            try:
-                validator.check(bound.arguments[name])
-            except Exception as e:
-                errors.append(f'   {name}: {e}')
-        if errors:
-            raise TypeError('Bad Arguments\n' + '\n'.join(errors))
-        result = func(*args, **kwargs)
-        if retcheck:
-            try:
-                retcheck.check(result)
-            except Exception as e:
-                raise TypeError(f'Bad return: {e}') from None
-        return result
-    return wrapper
-
-
-def enforce(**outerkwargs):
-    def enforced(func):
-        sig = inspect.signature(func)
-        retcheck = outerkwargs.pop('return_', None)
-        annotations = outerkwargs
-
-        @wraps(func)
-        def wrapper(*args, **kwargs):
-            bound = sig.bind(*args, **kwargs)
-            errors = []
-            for name, validator in annotations.items():
-                try:
-                    validator.check(bound.arguments[name])
-                except Exception as e:
-                    errors.append(f'   {name}: {e}')
-            if errors:
-                raise TypeError('Bad Arguments\n' + '\n'.join(errors))
-            result = func(*args, **kwargs)
-            if retcheck:
-                try:
-                    retcheck.check(result)
-                except Exception as e:
-                    raise TypeError(f'Bad return: {e}') from None
-            return result
-        return wrapper
-    return enforced
-
-
-class ValidatedFunction:
-    def __init__(self, func):
-        self.func = func
-
-    def __call__(self, *args, **kwargs):
-        bound = inspect.signature(self.func).bind(*args, **kwargs)
-        if hasattr(self.func, '__annotations__'):
-            for arg in bound.arguments:
-                if arg in self.func.__annotations__ and issubclass(
-                    self.func.__annotations__[arg], Validator
-                ):
-                    self.func.__annotations__[arg].check(bound.arguments[arg])
-        result = self.func(*args, **kwargs)
-        return result
-
-
-if __name__ == '__main__':
-    @validated
-    def add(x: Integer, y: Integer):
-        return x + y
-
-    @validated
-    def power(x: Integer, y: Integer):
-        return x ** y
-
-    @enforce(x=Integer, y=Integer, return_=Integer)
-    def mult(x, y):
-        return x * y

teststock.py

@@ -1,72 +0,0 @@
-import unittest
-
-import stock
-
-
-class TestStock(unittest.TestCase):
-    def test_create(self):
-        s = stock.Stock("GOOG", 100, 490.1)
-        self.assertEquals(s.name, "GOOG")
-        self.assertEquals(s.shares, 100)
-        self.assertEquals(s.price, 490.1)
-
-    def test_create_keyword(self):
-        s = stock.Stock(name="GOOG", shares=100, price=490.1)
-        self.assertEquals(s.name, "GOOG")
-        self.assertEquals(s.shares, 100)
-        self.assertEquals(s.price, 490.1)
-
-    def test_from_row(self):
-        s = stock.Stock.from_row(("GOOG", 100, 490.1))
-        self.assertEquals(s.name, "GOOG")
-        self.assertEquals(s.shares, 100)
-        self.assertEquals(s.price, 490.1)
-
-    def test_cost(self):
-        s = stock.Stock("GOOG", 100, 490.1)
-        self.assertEquals(s.cost, 49010)
-
-    def test_sell(self):
-        s = stock.Stock("GOOG", 100, 490.1)
-        s.sell(50)
-        self.assertEqual(s.shares, 50)
-
-    def test_repr(self):
-        s = stock.Stock("GOOG", 100, 490.1)
-        self.assertEquals(repr(s), "Stock('GOOG', 100, 490.1)")
-
-    def test_eq(self):
-        s1 = stock.Stock("GOOG", 100, 490.1)
-        s2 = stock.Stock("GOOG", 100, 490.1)
-        s3 = stock.Stock("GOOG", 50, 490.1)
-        self.assertEqual(s1, s2)
-        self.assertNotEqual(s1, s3)
-
-    def test_shares_type(self):
-        s = stock.Stock("GOOG", 100, 490.1)
-        with self.assertRaises(TypeError):
-            s.shares = "50"
-
-    def test_shares_value(self):
-        s = stock.Stock("GOOG", 100, 490.1)
-        with self.assertRaises(ValueError):
-            s.shares = -50
-
-    def test_price_type(self):
-        s = stock.Stock("GOOG", 100, 490.1)
-        with self.assertRaises(TypeError):
-            s.price = "50"
-
-    def test_price_value(self):
-        s = stock.Stock("GOOG", 100, 490.1)
-        with self.assertRaises(ValueError):
-            s.price = -90.9
-
-    def test_bad_attr(self):
-        s = stock.Stock("GOOG", 100, 490.1)
-        with self.assertRaises(AttributeError):
-            s.share = "foo"
-
-
-if __name__ == "__main__":
-    unittest.main()

ticker.py

@@ -1,28 +0,0 @@
-from structure import Structure
-
-
-class Ticker(Structure):
-    name = String()
-    price = Float()
-    date = String()
-    time = String()
-    change = Float()
-    open = Float()
-    high = Float()
-    low = Float()
-    volume = Integer()
-
-
-if __name__ == '__main__':
-    import csv
-
-    from follow import follow
-    from tableformat import create_formatter, print_table
-
-    formatter = create_formatter('text')
-
-    lines = follow('Data/stocklog.csv')
-    rows = csv.reader(lines)
-    records = (Ticker.from_row(row) for row in rows)
-    negative = (rec for rec in records if rec.change < 0)
-    print_table(negative, ['name', 'price', 'change'], formatter)

tox.ini

@@ -1,21 +0,0 @@
-[pycodestyle]
-max-line-length = 87
-
-[pydocstyle]
-ignore = D203,D213,D400,D401,D407,D413
-
-[flake8]
-ignore = D401
-enable-extensions = G,M
-max_line_length = 87
-exclude =
-    build/
-    dist/
-    docs/
-    tests/
-    .tox/
-    _version.py
-    .*
-
-[isort]
-line_length = 87

typedproperty.py

@@ -1,41 +0,0 @@
-def typedproperty(name, expected_type):
-    private_name = "_" + name
-
-    @property
-    def value(self):
-        return getattr(self, private_name)
-
-    @value.setter
-    def value(self, val):
-        if not isinstance(val, expected_type):
-            raise TypeError(f"Expected {expected_type}")
-        setattr(self, private_name, val)
-
-    return value
-
-
-def String(name):
-    return typedproperty(name, str)
-
-
-def Integer(name):
-    return typedproperty(name, int)
-
-
-def Float(name):
-    return typedproperty(name, float)
-
-
-if __name__ == "__main__":
-
-    class Stock:
-        name = String("name")
-        shares = Integer("shares")
-        price = Float("price")
-
-        def __init__(self, name, shares, price):
-            self.name = name
-            self.shares = shares
-            self.price = price
-
-    print(Stock)