python 非ASCII字符对齐

由于非ASCII和ASCII字符的宽度问题，简单的用print格式化是无法对齐诸如中英文字符串，可以通过主动字符填充的方式实现

运行环境：win10 + python 3.6

import os

import sys

def isAscii(ch) :
return ch <= u'\u007f'

def formatByWidth(text, width) :
count = 0
for u in text:
if not isAscii(u) :
count += 1
return text + " " * (width - count - len(text))

print(formatByWidth("欢迎", 20) + "test")

print(formatByWidth("hello", 20) + "test")

如果是Python2，注意编码问题，在所有非ASCII处需要调用decode('utf-8')，即以上代码改写成

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

import os
import sys

def isAscii(ch) :
return ch <= u'\u007f'

def formatByWidth(text, width) :
count = 0
for u in text:
if not isAscii(u) :
count += 1
return text + " " * (width - count - len(text))

print(formatByWidth("欢迎".decode('utf-8'), 20) + "test")
print(formatByWidth("hello", 20) + "test")