1#!/usr/bin/env python3
2"""
3Prints the nth line of a file.
4
5This is meant to fill a gap between the Unix utilities ``head`` and
6``tail``, which I normally use in one of the following forms:
7
8    $ head -n 5 myfile.txt
9    $ tail -n 5 myfile.txt
10
11which print the first/last 5 lines of a file, respectively.
12
13This command fills the gap -- it gets the nth line of a file, e.g. this
14prints the 100th line of the file:
15
16    $ body -n 100 myfile.txt
17
18"""
19
20import argparse
21import subprocess
22
23
24if __name__ == "__main__":
25    parser = argparse.ArgumentParser()
26
27    parser.add_argument("-n", required=True, dest="lineno", type=int)
28    parser.add_argument("PATH")
29
30    args = parser.parse_args()
31
32    for lineno, line in enumerate(open(args.PATH), start=1):
33        if lineno == args.lineno:
34            print(line, end="")
35            break