How to delete a user specified line from a text file in python? (The file contains different lines with dictionary)

Question

There is a text file my_file.txt which contains several rows of dictionary items
{big: small}
{high: low}
{thin: thick}

How to delete any item from this file that user chooses?

Answer 1

To delete a specified line from a text file can be done for example in this way:

https://code.sololearn.com/c6ej3sFhb0aj/?ref=app

But for a very big number of data records it would be recomended to use a database for the application.

Answer 2

I see . Thats one way to do it glad you figured it out

Answer 3

with open('scratch_4.txt', 'r+') as file:
with open('new.txt', 'w') as new_file:
for line in file:
line = line.strip()
if remove_item in line:
continue:
new_file.write(line)

Answer 4

Title asks how to delete a line from a text file but in Description it asks how to delete any item - presumably was referring to the dictionary item - not the line.

Please clarify or edit the post to confirm which one it is, even better ...

Answer 5

can the user chooseJust 1 or multiple, if the user pick big can he also pick small or is big the key and small the value which means big gets deleted as a whole?

Answer 6

Only one item can be chosen at a time. Input will be key only. Using key, I map value and identify the item.

Answer 7

Did you try to do it ? Neethu Nath

Answer 8

I tried to use line.strip() but I cannot check if a dictionary in line

Answer 9

Can you show ?

Answer 10

It is giving error
TypeError: 'in <string>' requires string as left operand, not dict

Answer 11

Youre pretty close remove the + from read mode, for line in file.readlines() remove reset of line below and just print line

Answer 12

then you can continue from there repost your code

Answer 13

Oh forgot it might overwite file so it may not print anything

Answer 14

https://pastebin.com/Cq9d3HRY pw: booker

Change text_file to w.e your file is

Answer 15

I changed the logic completely and solved this

Answer 16

Awsome ! :D can i see your newly logic ?

Answer 17

I used single dictionary to add all inputs instead of each item in a row

Answer 18

Thank you for trying to help me