python学习--string模块

**使用之前:

import string;

可方便使用模块内的纯字母（包含大小写），纯小写字母，纯大写字母，纯数字，16进制数字,全部纯标点符号，全部字母符号**

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The constants defined in this module are:

string.ascii_letters

The concatenation of the ascii_lowercase and ascii_uppercase constants described below. This value is not locale-dependent.

string.ascii_lowercase

The lowercase letters ‘abcdefghijklmnopqrstuvwxyz’. This value is not locale-dependent and will not change.

string.ascii_uppercase

The uppercase letters ‘ABCDEFGHIJKLMNOPQRSTUVWXYZ’. This value is not locale-dependent and will not change.

string.digits

The string ‘0123456789’.

string.hexdigits

The string ‘0123456789abcdefABCDEF’.

string.letters

The concatenation of the strings lowercase and uppercase described below. The specific value is locale-dependent, and will be updated when locale.setlocale() is called.

string.lowercase

A string containing all the characters that are considered lowercase letters. On most systems this is the string ‘abcdefghijklmnopqrstuvwxyz’. The specific value is locale-dependent, and will be updated when locale.setlocale() is called.

string.octdigits

The string ‘01234567’.

string.punctuation

String of ASCII characters which are considered punctuation characters in the C locale.

string.printable

String of characters which are considered printable. This is a combination of digits, letters, punctuation, and whitespace.

string.uppercase

A string containing all the characters that are considered uppercase letters. On most systems this is the string ‘ABCDEFGHIJKLMNOPQRSTUVWXYZ’. The specific value is locale-dependent, and will be updated when locale.setlocale() is called.

string.whitespace

A string containing all characters that are considered whitespace. On most systems this includes the characters space, tab, linefeed, return, formfeed, and vertical tab.

当然了，也可以用chr(asci)、ord(字母)

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