去除字符串中的特殊字符

import string

filepath = '/a/b/cja#!$Y^%vfjb()&(-ew.)'  # 这个文件名不可用
pathname = os.path.dirname(filepath)
basename = os.path.basename(filepath)

punctuation = string.punctuation + " " 
punctuation = punctuation.replace(".", '')
for c in punctuation:
    basename = basename.replace(c, "_")

filename = os.path.join(pathname, basename)