#!/usr/bin/env python3
import argparse
import os
import subprocess

import matplotlib.pyplot as plt


def function_pdf(proc: str):
    p = subprocess.Popen([proc], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
    output, _ = p.communicate(b"1024 1024\n32768 1024\n32768 32768\n")
    p.stdin.close()
    for index in range(0, len(lines := output.splitlines()), 2):
        plt.hist(list(map(int, lines[index].split())), bins=100)
        plt.title(f"stddev: {lines[index + 1].decode()}")
        plt.show()


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('proc')
    matches = parser.parse_args()
    function_pdf(matches.proc)