Python - Deleting the first 2 lines of a string

Question

I\'ve searched many threads here on removing the first two lines of a string but I can\'t seem to get it to work with every solution I\'ve tried.

Here is what my string

Answer 1

You can find index of '\n' and ignore first; Then, start new string from end of second '\n' sub-string in main string.

import re


def find_sub_string_index(string, sub_string, offset=0, ignore=0):
    start = 0
    swap = len(sub_string)
    ignore += 1 # find first at least
    try:
        if start < 0:
            return -1 # Not Found
        if offset > 0:
            # Start main string from offset (offset is begining of check)
            string = string[offset:]
        for i in range(ignore):
            # swap: end of substring index
            # start is end of sub-string index in main string
            start += re.search(sub_string, string).start() + swap
            string = string[start:]
        return start
    except:
        return -1 # Got Error


string = """The first line.
The second line.
The third line.
The forth line.
The fifth line."""
sub_string = "\n"

ignore = 1 # Ignore times

start = find_sub_string_index(string, sub_string, ignore=1)

print("Finding sub-string '{0}' from main text.".format(sub_string))
print("Ignore {0} times.".format(ignore))
print("Start index:", start)
print("Result:")
print(string[start:])

The result is:

$ python3 test.py
Finding sub-string '
' from main text.
Ignore 1 times.
Start index: 33
Result:
The third line.
The forth line.
The fifth line.
$
$
$
$ python3 test.py
Finding sub-string 'The' from main text.
Ignore 2 times.
Start index: 19
Result:
 second line.
The third line.
The forth line.
The fifth line.
$