How I would implement 178

eriks_178_solution.py

#!/usr/bin/env python3

""" short module description

Longer module description goes here. 
"""

from collections import defaultdict
from dateutil.parser import parse


def get_min_max_amount_of_commits(commit_log: str, year: int = None) -> (str, str):
    """Calculate the amount of inserts / deletes per month from the
    provided commit log and returns a tuple of the least active month
    and most active month.

    :param str commit_log: file path
    :param int year: optional year to filter for

    Returns a tuple of (least_active_month, most_active_month)
    """

    counts = defaultdict(int)

    with open(commit_log) as logdata:

        for line in logdata:

            try:
                date_str, payload = line.strip().split("|")
            except ValueError as error:
                # log an error for line
                continue

            try:
                date = parse(date_str, fuzzy=True)
            except ValueError as error:
                # log an error for date_str
                continue

            if year and date.year != year:
                continue

            key = f"{date.year}-{date.month:02d}"

            words = payload.split()

            interesting_value_indices = {3, 5}

            counts = sum(
                [
                    int(word)
                    for i, word in enumerate(words)
                    if i in interesting_value_indices
                ]
            )

            counts[key] += counts

    return min(counts), max(counts)


if __name__ == "__main__":

    print(get_min_max_amount_of_commits("log"))