Parse zsh history to see most used commands

zsh_history.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Usage: ./zsh_history.py <path_to_history_file>

import sys
import os
import pprint
from collections import defaultdict
from operator import itemgetter

commands = defaultdict(int)

zsh_history = os.path.realpath(os.path.expanduser("~/.zsh_history"))
if len(sys.argv) == 2:
    zsh_history = sys.argv[1]

with open(zsh_history, "r") as f:
    line = f.readline()
    while line:
        try:
            line = f.readline()
            commands[line.split(";")[1].split()[0]] += 1
        except UnicodeDecodeError:
            continue
        except IndexError:
            continue

pprint.pprint(sorted(commands.items(), key=itemgetter(1)))