python 3中的字符数组? [英] Array of characters in python 3?

问题描述

在 Python 2.7 中，我可以创建一个字符数组，如下所示:

In Python 2.7 I can create an array of characters like so:

#Python 2.7 - works as expected
from array import array
x = array('c', 'test')

但是在 Python 3 'c'不再是可用的类型代码.如果我想要一个字符数组，该怎么办? 'u'类型也将被删除.

But in Python 3 'c' is no longer an available typecode. If I want an array of characters, what should I do? The 'u' type is being removed as well.

#Python 3 - raises an error
from array import array
x = array('c', 'test')

TypeError:无法使用str初始化类型代码为'c'的数组

TypeError: cannot use a str to initialize an array with typecode 'c'

推荐答案

使用字节'b'的数组，并在Unicode字符串之间进行编码.

Use an array of bytes 'b', with encoding to and from a unicode string.

使用array.tobytes().decode()和array.frombytes(str.encode())在字符串之间进行转换.

Convert to and from a string using array.tobytes().decode() and array.frombytes(str.encode()).

>>> x = array('b')
>>> x.frombytes('test'.encode())
>>> x
array('b', [116, 101, 115, 116])
>>> x.tobytes()
b'test'
>>> x.tobytes().decode()
'test'

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