全角文字を半角文字2つとしてカウントする

text_counter.py

from unicodedata import east_asian_width

def count_text(message):
    # 全角文字を半角文字2つとしてカウントする
    width_dict = {
      'F': 2,   # Fullwidth
      'H': 1,   # Halfwidth
      'W': 2,   # Wide
      'Na': 1,  # Narrow
      'A': 2,   # Ambiguous
      'N': 1    # Neutral
    }
    chars = [char for char in message]
    east_asian_width_list = [east_asian_width(char) for char in chars]
    width_list = [width_dict[east_asian_width]
                  for east_asian_width in east_asian_width_list]
    return sum(width_list)