python remove lines from file starting with code example

Example 1: python read and delete line from file

with open("yourfile.txt", "r") as f:
    lines = f.readlines()
with open("yourfile.txt", "w") as f:
    for line in lines:
        if line.strip("\n") != "nickname_to_delete":
            f.write(line)

Example 2: python remove lines of string

output_String = input_String.split("\n", 1)[1]
#this will get rid of the first line and keep the rest
output_String = input_String.split("\n", 3)[1]
# this will get rid of the first 3 lines ecept the 2nd line and keep everything else
output_String = input_String.split("\n", 4)[0]
# this will get rid of the first 4 lines ecept the first and keep any lines after the 4th line if there are any