translate()在python错误中只接受一个参数(给定2个)

Question

import os
import re

def rename_files():
    # get the files from dir
    file_list=os.listdir(r"C:\OOP\prank")
    print(file_list)
    saved_path=os.getcwd()
    print("current working directory"+saved_path)
    os.chdir(r"C:\OOP\prank")
    #rename the files
    for file_name in file_list:
        print("old name-"+file_name)
        #print("new name-"+file_name.strip("0123456789"))
        os.rename(file_name,file_name.translate(None,"0123456789"))
        os.chdir(saved_path)

rename_files()

由于翻译行显示错误...帮助我下一步做什么..我正在使用翻译从文件名中删除数字.

Traceback (most recent call last):
    File "C:\Users\vikash\AppData\Local\Programs\Python\Python35-  32\pythonprogram\secretName.py", line 17, in <module>
rename_files()
      File "C:\Users\vikash\AppData\Local\Programs\Python\Python35-  32\pythonprogram\secretName.py", line 15, in rename_files
     os.rename(file_name,file_name.translate(None,"0123456789"))
     TypeError: translate() takes exactly one argument (2 given)

Answer 1

str.translate需要dict将unicode序列映射到其他unicode oridinals(或者None如果你想删除该字符).您可以像这样创建它:

old_string = "file52.txt"
to_remove = "0123456789"
table = {ord(char): None for char in to_remove}
new_string = old_string.translate(table)
assert new_string == "file.txt"

但是,通过使用该str.maketrans功能,可以更简单地制作表格.它可以采用各种各样的参数,但是你需要三个arg形式.我们忽略前两个args,因为它们用于将字符映射到其他字符.第三个arg是您要删除的字符.

old_string = "file52.txt"
to_remove = "0123456789"
table = str.maketrans("", "", to_remove)
new_string = old_string.translate(table)
assert new_string == "file.txt"

Answer 2

Python中的更高版本使用此:

eg: oldname= "delhi123"    
remove="1234567890"    
table=str.maketrans("","",remove)    
oldname.translate(table)    

您的查询的整体解决方案:

import os    

def rename_file_names():    
    file_list=os.listdir(r"C:\Users\welcome\Downloads\Compressed\prank")    
    print (file_list)    
    saved_path=os.getcwd()    
    print("current working direcorty is"+saved_path)    
    os.chdir(r"C:\Users\welcome\Downloads\Compressed\prank")    
    remove="123456789"    
    table=str.maketrans("","",remove)    
    for file_name in file_list:    
        os.rename(file_name,file_name.translate(table))    


rename_file_names()