我想創(chuàng)建一個函數(shù)來從熊貓數(shù)據(jù)框中刪除特殊字符，但也傳遞一個參數(shù)來保留所需的字符。def strip_characters(c, req_char = ''):    spec_chars = ["!",'"',"#","%","&","'","(",")","*","+",",","-",".","/",":",";","<","=",">","?","@","[","\\","]","^","_","`","{","|","}","~","–"]    new_spec = spec_chars.remove(req_char)    for char in spec_chars:        c = c.str.replace(char, ' ')    return cdf['col'] = df['col'].apply(strip_characters,',')  # passing a comma to retain the character# df['col'] = ['Dining Room', 'Pre-War', 'Laundry in Building', '&Lobby']