用tkinter选择多个文本文件后，如何同时打开和操作它们？

Question

Python noob here:

I am trying to speed up my file-editing through selecting multiple text files with tkinter, but I don't know how to open them and edit them all at once to remove <_io.TextIOWrapper name='xyz.txt' mode='w' encoding='UTF-8'>

My code:

import re
from Tkinter import *
from tkFileDialog import askopenfilenames

filename = askopenfilenames()

f = open(filename, "r")

lines = f.readlines()

f.close()

f = open(filename, "w")

for line in lines:
    line = re.sub('<(.|\n)*?>', "", line)
    f.write(line)

f.close()

It works with askopenfilename (not plural) and I remove the unwanted string just fine.

Any hint would be appreciated!

Answer 1

You are not working with each file name within the list. So instead you need to run a for loop over your list created from askopenfilenames() .

According to the tooltip in my IDE askopenfilenames() returns a list.

def askopenfilenames(**options):
    """Ask for multiple filenames to open

    Returns a list of filenames or empty list if
    cancel button selected
    """
    options["multiple"] = 1
    return Open(**options).show()

I changed your variable filename to filenames as it is a list and this makes more sense. Then I ran a for loop over this list and it should work as desired.

Try this below code.

import re
from Tkinter import *
from tkFileDialog import askopenfilenames

filenames = askopenfilenames()

for filename in filenames:
    f = open(filename, "r")

    lines = f.readlines()

    f.close()

    f = open(filename, "w")

    for line in lines:
        line = re.sub('<(.|\n)*?>', "", line)
        f.write(line)

    f.close()

With a couple of if statements we can prevent the most common errors that may come up if you select nothing or select file types that are not compatable.

import re
from Tkinter import *
from tkFileDialog import askopenfilenames

filenames = askopenfilenames()

if filenames != []:
    if filenames[0] != "":
        for filename in filenames:
            f = open(filename, "r")

            lines = f.readlines()

            f.close()

            f = open(filename, "w")

            for line in lines:
                line = re.sub('<(.|\n)*?>', "", line)
                f.write(line)

            f.close()