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python how to remove spacific line in file

I'm trying to delete from a file.

This is what I am trying to do.

1.importing Easygui

2.Put three modes plus quitting

Everything is working except deleting part.
this is what I have

import easygui

filea = open('GroceryList.txt', 'a')
fr = open('GroceryList.txt', 'r')
filer = open('GroceryList.txt', 'r')

runinng = True
while runinng:
a = easygui.choicebox('Do you want to add, delete, or see your list?',
choices = ['add', 'delete', 'see', 'quit'])
if a == 'add':
ad = easygui.enterbox('What do you want to add')
filea.write(ad)
filea.write('n')
filea.close()
filea = open('GroceryList.txt', 'a')


elif a == 'delete':
rn = easygui.enterbox('What are you going to delete?')
rl = fr.readlines()
for lines in fr:
if rn in lines:
line.split()
fr.close()
fr = open('GroceryList.txt', 'r')


elif a == 'see':
s = filer.readlines()
easygui.msgbox(s)
filer.close()
filer = open('GroceryList.txt', 'r')

elif a == 'quit':
runinng = False
filea.close()
fr.close()
filer.close()


The part that is not working is:

elif a == 'delete':
rn = easygui.enterbox('What are you going to delete?')
rl = fr.readlines()
if rn in fr:
line.remove()
fr.close()
fr = open('GroceryList.txt', 'r')


w

2 Answers
2

As others mentioned in the comments just providing a small script to clear out the doubts you may still have

fr = open('GroceryList.txt', 'r')
rl = fr.readlines()
new_list_to_keep_rows=
for row in rl:
#add rows to keep
new_list_to_keep_rows.append(row)

new_file = open('GroceryList_new.txt', 'w')# open file in write mode
for item in new_list_to_keep_rows:
new_file.write("%sn" % item)


rename the file when you are sure you have everything.

Try this.

p = "C:\Path\To\Your\File\myfile.txt"
f = open(p, "r+") # Open file
f.seek(0) # Goto top line in file
d = f.readlines() # Read all lines from top to bottom and save them in variable
for l in d: # Check if any line matches line you want to remove
if l != "Line to remove":
f.write(l + "n") # Write all lines except the one you dont want to
f.close()
print("Data saved to" + " " + f.name) # Optional


If you want to use this you have to change your code otherwise you will get IOErrors. Put your code in class and run it with proper handling.

Traceback (most recent call last): File "C:/Python27/Hello world/editGroceryList.py", line 35, in <module> for fchar in forbid: NameError: name 'forbid' is not defined

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