strprob

#! /usr/bin/env python3
"""
USAGE
    strprob <string> <tries> <wordlist-path>

DESCRIPTION
    Figure out how likely it is for a string to show up in x tries.

EXAMPLE
    How many times should you expect "passp" to show up in a passphrase that
    is 6 words long?

    ```
    $ strprob passw 6 eff_large_wordlist.txt
    For 1 out of 7776 (1 - ((7776 - 1)/7776)^6):

    0.0007713569082283822
    ```
"""

import sys

string = sys.argv[1].lower()
tries = int(sys.argv[2])
path = sys.argv[3]
count = 0
total = 0

with open(path) as file:
    for line in file:
        total += 1

        if string in line.lower():
            count += 1

print("For", count, "out of", total, f"(1 - (({total} - {count})/{total})^{tries}):\n")
print(1 - pow((total - count) / total, tries))