Finden Sie die scheinbare Breite einer Zeichenfolge in Python heraus

# -*- coding: utf-8 -*-

def width(s):
    return sum([_width(c) for c in s.decode('utf-8')])

def _width(c):
    return 2 if _isMultiByte(c) else 1

def _isMultiByte(c):
    return ord(c) > 255

assert 0 == width('')

assert 1 == width('a')
assert 1 == width('A')
assert 1 == width('EIN')
assert 1 == width('-')
assert 1 == width('+')
assert 1 == width(' ')
assert 1 == width('\\')
assert 1 == width('\n')
assert 1 == width('\t')

assert 2 == width('aa')
assert 2 == width('AA')
assert 2 == width('Aber')
assert 2 == width('Tsu')
assert 2 == width('Po')
assert 2 == width('ich')
assert 2 == width('！')
assert 2 == width('Ｇ')
assert 2 == width('EIN')
assert 2 == width('○')
assert 2 == width('■')
assert 2 == width('、')
assert 2 == width('。')
assert 2 == width('‐')
assert 2 == width('- -')
assert 2 == width('　')
assert 2 == width('\\\\')
assert 2 == width('\r\n')

assert 4 == width('ＹＹ')
assert 4 == width('0ｗ0')
assert 4 == width('OK！')

# -*- coding: utf-8 -*-

def width(s):
    return sum([_width(c) for c in s.decode('utf-8')])

def _width(c):
    return 2 if _isMultiByte(c) else 1

def _isMultiByte(c):
    import unicodedata
    return unicodedata.east_asian_width(c) in ['F', 'W', 'A']

$Echo Howa| python width.py
8

# -*- coding: utf-8 -*-

import sys
s = sys.stdin.readlines()[0].strip()

print width(s)

$ python width.py howa
8

# -*- coding: utf-8 -*-

import sys
s = sys.argv[1]

print width(s)

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