table.py 文件源码

def get_text_length(text):
    # `len(unichar)` measures the number of characters, so we use
    # `unicodedata.east_asian_width` to measure the length of characters.
    # Following responses are considered to be full-width length.
    # * A(Ambiguous)
    # * F(Fullwidth)
    # * W(Wide)
    text = six.text_type(text)
    return sum(2 if unicodedata.east_asian_width(char) in 'WFA' else 1
               for char in text)