import subprocess
import shlex
import os
from datetime import datetime

command = "ls -la"
command2 = "ps alx"
log_file = "process.log"

def main():
    buf_list = []
    buf_list.append(get_current_time())

    for i in readline_stdout():
        buf_list.append(i)

    write_file_to_log(buf_list)

def get_current_time():
    current_time = datetime.now().strftime("%Y/%m/%d %H:%M:%S") + " ---------------------------------------------------------------------------------\n"
    return current_time


def readline_stdout():
    proc = subprocess.Popen(shlex.split(command2), stdout = subprocess.PIPE, stderr = subprocess.PIPE)

    while True:
        line = proc.stdout.readline()
        yield str(line) + "\n"

        if not line and proc.poll() is not None:
            break


def write_file_to_log(logs):
    file = open(log_file, 'a')
    file.writelines(logs)


if __name__ == '__main__':
    main()