How to remove a line containing two specific string in text?

def deletematerial():
    print('Deleting of material ')
    fh_r = open("AQUESTO.txt", "r")
    name = input('Enter the name of de material to eliminate: ').lower()
    priority = input('the material is of low or high: ')
    print("\n")
    with open("bb.txt", "w") as output:
        for line in fh_r:
            if (name and priority not in line.strip("\n")):
                output.write(line)

    fh_r.close()
    os.remove("AQUESTO.txt")
    os.replace('bb.txt', 'AQUESTO.txt')

So if my text file have two same words:

name     |  priority
gun      |  low
granade  |  high
gun      |  high

and I put that I want to delete:

name: gun
priority: high

The second gun on the list, there should be the only thing that is deleting

When I delete, the file only deletes the ones that have just priority of high:

name    |   priority
gun     |   low

I want the file like this:

name     |  priority
gun      |  low
grenade  |  high

Solution

Essentially, you want skip lines with the name and priority words in them i.e. (A and B), or to put it conversely not (A and B) which is equal to (not A) or (not B)^✶, i.e. in order to keep those without name in the line or those that do have it, but don't have the priority word in them, . Here's how to write code that does that (using the latter logic to decide when to write copy lines). I also streamlined the code in your question somewhat by using with to open both the files simultaneously — so their closing will be done automatically. I also removed the unneeded os.remove().

^✶De Morgan’s transformation rules of logic.

import os

def delete_material():
    print('Deleting of material ')
    name = input('Enter the name of the material to eliminate: ').lower()
    priority = input('the material is of low or high: ').lower()
    print("\n")

    with open("AQUESTO.txt", "r") as fh_r, open("bb.txt", "w") as output:
        for line in fh_r:
            if name not in line or priority not in line:
                output.write(line)

    os.replace('bb.txt', 'AQUESTO.txt')  # Replace original file with updated version.


delete_material()
print('fini')