importerror cannot import name 'Iterable' from 'collections'

Question

问题遇到的现象和发生背景

我用的python版本是3.10.1 运行pygal出错

问题相关代码，请勿粘贴截图

#die.py

from random import randint

class Die():
    """A class representing a single die."""
    
    def __init__(self, num_sides=6):
        """Assume a six-sided die."""
        self.num_sides = num_sides
        
    def roll(self):
        """"Return a random value between 1 and number of sides."""
        return randint(1, self.num_sides)

#die_visual.py

import pygal

from die import Die

# Create a D6.
die = Die()

# Make some rolls, and store results in a list.
results = []
for roll_num in range(1000):
    result = die.roll()
    results.append(result)
    
# Analyze the results.
frequencies = []
for value in range(1, die.num_sides+1):
    frequency = results.count(value)
    frequencies.append(frequency)
    
# Visualize the results.
hist = pygal.Bar()
hist.force_uri_protocol = 'http'

hist.title = "Results of rolling one D6 1000 times."
hist.x_labels = ['1', '2', '3', '4', '5', '6']
hist.x_title = "Result"
hist.y_title = "Frequency of Result"

hist.add('D6', frequencies)
hist.render_to_file('die_visual.svg')

就是import pygal出了问题，请问要如何解决？

Answer 1

自 Python 3.10 開始，庫 collections 以下各項都停用了，其中就包含了 pygal._compat.py 中的 from collections import Iterator

["Awaitable", "Coroutine", "AsyncIterable", "AsyncIterator", "AsyncGenerator", "Hashable", "Iterable", "Iterator", "Generator", "Reversible", "Sized", "Container", "Callable", "Collection", "Set", "MutableSet", "Mapping", "MutableMapping", "MappingView", "KeysView", "ItemsView", "ValuesView", "Sequence", "MutableSequence", "ByteString"]

pygal 在 pypi 的最新版本為 2.4.0, 但是它的 pygal._compat.py 更新並没有加入

因此，必須自己更改 Lib\site-packages\pygal_compat.py` 的內容

# from collections import Iterable        # Line 23
try:
    from collections.abc import Iterable
except ImportError:
    from collections import Iterable

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