中英文字符串对齐接口封装

def myljust(str1, width, fillchar = None):
    '''
    中英文混合左对齐
    :param str1: 欲对齐字符串
    :param width: 宽度
    :param fillchar: 填充字符串
    :return: 新的经过左对齐处理的字符串对象
    '''
    if fillchar == None:
        fillchar = ' '
    length = len(str1.encode('gb2312'))
    fill_char_size = width - length if width >= length else 0
    return "%s%s" %(str1, fillchar * fill_char_size)


def myrjust(str1, width, fillchar = None):
    '''
    中英文混合右对齐
    :param str1: 欲对齐字符串
    :param width: 宽度
    :param fillchar: 填充字符串
    :return: 新的经过右对齐处理的字符串对象
    '''
    if fillchar == None:
        fillchar = ' '
    length = len(str1.encode('gb2312'))
    fill_char_size = width - length if width >= length else 0
    return "%s%s" %(fillchar * fill_char_size, str1)

def mycenter(str1, width, fillchar = None):
    '''
    中英文混合居中对齐
    :param str1: 欲对齐字符串
    :param width: 宽度
    :param fillchar: 填充字符串
    :return: 新的经过居中对齐处理的字符串对象
    '''
    if fillchar == None:
        fillchar = ' '
    length = len(str1.encode('gb2312'))
    fill_char_size = width - length if width >= length else 0
    if length%2 == 0:
        return "%s%s%s" %(fillchar * (fill_char_size //2), str1, fillchar* (fill_char_size // 2))
    else:
        return "%s%s%s" %(fillchar * (fill_char_size //2 + 1), str1, fillchar* (fill_char_size // 2))