Cheat sheet for development in Python

Environemnt Variables

import os

os.getenv("ENV_VAR_NAME", "default_value")

os — Miscellaneous operating system interfaces — Python 3.12.3 documentation

Command Line Argument

import argparse

parser = argparse.ArgumentParser(description='Parse command line options.')
parser.add_argument('integers', metavar='c', type=int, nargs='+',
                    help='an integer for the accumulator')
parser.add_argument('--sum', dest='accumulate', action='store_const',
                    const=sum, default=max,
                    help='sum the integers (default: find the max)')

args = parser.parse_args(['--sum', '7', '-1', '42'])
print(args.accumulate(args.integers))

argparse — Parser for command-line options, arguments and sub-commands — Python 3.12.3 documentation

Random number

import random
x = random.randint(0, 100) # 0 <= …

argparse command command line development documentation import integer integers interfaces line max miscellaneous operating system python python 3 sum type variables