Question

我正在开发Python的在线教程，＆amp;我试图为一个示例问题而不是它要求的更远。

目标是重命名文件夹中的所有文件。我的补充是提示用户输入文件夹，而不是硬编码。

我已经尝试了Python: user input and commandline arguments中的建议，但是当我运行脚本时，没有显示提示文字。

现在我的脚本看起来像这样：

import os
import sys
import optparse
def RName_Files():
    #Get the folder to user
    Fol = raw_input("Please enter the folder whose files should have numbers stripped from their name: ") #I've never run past this point

    #Iterate through the files in the folder
    for f in ListDir(f):
        print("Current file is '" + f)

我想我错误地理解了我所关联的问题中的答案，并希望有人可以为我澄清答案。特别是因为该线程混合了2.7和3.x。

谢谢！

Answer 1

循环浏览时，

f未定义。你是说ListDir(Fol)吗？此外，ListDir也未定义。

但最重要的是，您没有在程序中调用RName_Files函数，请尝试在脚本末尾添加RName_Files()。

什么可行？

import os

ListDir = os.listdir

def RName_Files():
    #Get the folder to user
    Fol = raw_input("Please enter the folder whose files should have numbers stripped from their name: ")

    #Iterate through the files in the folder
    for f in ListDir(Fol):
        print("Current file is '" + f)

if __name__ == "__main__":
    RName_Files()

您还应遵循变量和函数名称的PEP8命名约定。在python中，变量和函数是 snake_case ，而类名是 CamelCase 。您还可以更清楚地使用您的姓名rename_files代替RName_Files，folder或path代替Fol，file_name代替f。

这将是这样的：

from os import listdir

def rename_files():
    #Get the folder to user
    path = raw_input("Please enter the folder whose files should have numbers stripped from their name: ")

    #Iterate through the files in the folder
    for file_name in listdir(path):
        print("Current file is " + file_name )
        # do something with file_name 

if __name__ == "__main__":
    rename_files()

Answer 2

你需要调用你的方法

import os
import sys
import optparse
def RName_Files():
    #Get the folder to user
    fol = raw_input("Please enter the folder whose files should have numbers stripped from their name: ") #I've never run past this point

    #Iterate through the files in the folder
    for f in os.listdir(fol):
        print("Current file is '" + f)


RName_Files()

Answer 3

＆＃34; pythonic＆＃34;这样做的方式是这样的：

import os
import sys
import optparse
def RName_Files():
    #Get the folder to user
    Fol = raw_input("Please enter the folder whose files should have numbers stripped from their name: ") #I've never run past this point

    #Iterate through the files in the folder
    for f in ListDir(Fol):
        print("Current file is '" + f)

def main():
    RName_Files()

if __name__ == "__main__":
    main()

基本上，您使用def定义了您的函数，但从未实际调用它。这是一个很好的做法，有一个主要的功能来调用你创建的那些并以这种方式调用它们。

Python 2.7.10提示用户输入

3 个答案: