Intuitive file search written in Python

ifsearch.py

import sys
import os

def usage():
    print("""python ifsearch.py --list <path>
python ifsearch.py --dump <path>
python ifsearch.py --search <term> <path>""")

indention = 0

def indent():
    global indention
    indention += 1

def dedent():
    global indention
    indention -= 1

def iprint(s):
    print('   |' * indention + s)

def listing(p):
    for F in sorted(os.listdir(p)):
        if os.path.isdir(p + os.sep + F):
            iprint(F + ":")
            indent()
            listing(p + os.sep + F)
            dedent()
        else:
            iprint(F)

def dump(p):
    for F in sorted(os.listdir(p)):
        if os.path.isdir(p + os.sep + F):
            iprint(F + ":")
            indent()
            dump(p + os.sep + F)
            dedent()
        else:
            iprint(F)
            indent()
            file_contents = open(p + os.sep + F, 'rt').read().split("\n")
            longest_line = max([len(ln) for ln in file_contents])+5
            iprint("_"*(longest_line-2))
            c = 1
            for ln in file_contents:
                iprint(f'{c} {ln}'.ljust(longest_line-2) + ' |')
                c += 1
            iprint("`"*(longest_line-2))
            dedent()

def qmatch(term, sample):
    sample = sample.lower()
    sample = sample.strip()
    return term in sample

def search(term, p):
    for F in sorted(os.listdir(p)):
        if os.path.isdir(p + os.sep + F):
            if qmatch(term, F):
                iprint(p + os.sep + F + ":")
            indent()
            search(term, p + os.sep + F)
            dedent()
        else:
            if qmatch(term, F):
                iprint(p + os.sep + F)
            indent()
            file_contents = open(p + os.sep + F, 'rt').read().split("\n")
            longest_line = max([len(ln) for ln in file_contents])+5
            first_match = True
            c = 1
            for ln in file_contents:
                if qmatch(term, ln):
                    if first_match:
                        iprint(p + os.sep + F)
                        indent()
                        iprint("_"*(longest_line-2))
                    iprint(f'{c} {ln}'.ljust(longest_line-2) + ' |')
                    first_match = False
                c += 1
            if not first_match:
                iprint("`"*(longest_line-2))
                dedent()
            dedent()
    

if __name__ == "__main__":
    if len(sys.argv) == 1:
        usage()
    elif len(sys.argv) == 3:
        if sys.argv[1] == "--list":
            listing(sys.argv[2])
        elif sys.argv[1] == "--dump":
            dump(sys.argv[2])
    elif len(sys.argv) == 4 and sys.argv[1] == "--search":
        search(sys.argv[2], sys.argv[3])
    else:
        usage()