如何使用 args

如何解决如何使用 args

我还是 Python 新手，我有多个脚本，我必须将参数传递给它们才能运行。它们都设置为在命令行中运行，例如：

python script1 -c config/config_file1.json -m import

python script2 -c config/config_file1.json -cl config/config_file2.json 

python script3 -c config/config_file3.json -d name

我现在必须创建一个脚本来运行上面的所有脚本，我什至不知道从哪里开始。我已经看到了 subprocess 或 sys.argv 的建议，但我不知道这种情况的最佳方法是什么。我所需要的只是能够运行主脚本来运行所有其他 3 个脚本，并知道处理我需要传递给它们的所有参数的最佳方法。任何建议将不胜感激。

解决方法

如果脚本的参数是静态的，则：

import subprocess


# This is like running `python script1 -c config/config_file1.json -m import` and your other commands
subprocess.call(["python","script1","-c","config/config_file1.json","-m","import"])
subprocess.call(["python","script2","-cl","config/config_file2.json"])
subprocess.call(["python","script3","config/config_file3.json","-d","name"])

如果你每次都需要传入不同的参数，那么你可以从 input() 或 argparse 库中获取它们（在这种情况下个人更喜欢 argparse）：

import argparse
import subprocess


def get_args():
    parser = argparse.ArgumentParser()
    # The add_argument method takes this pattern: ("--flag","-abreviated-flag",dest="variable_to_store_input",help="Help message to display for partcular argument")
    parser.add_argument("--name","-n",dest="name",help="Name to enter: --name Bill,OR -n Bill")
    parser.add_argument("--age","-a",dest="age",help="Age to enter: --age 21,OR -a 21")
    # Add as many arguments as you need following this format.

    args = parser.parse_args()  # Collect and parse the inputed arguments

    # Make sure needed arguments are there
    if not args.age:
        parser.error("No age specified! Use --help for more info.")

    if not args.name:
        parser.error("No name specified! Use --help for more info")

    return args  # If this line is reached,all of the arguments are filled


arguments = get_args() # Gets the arguments
name = arguments.name
age = arguments.age

# This is just like running the command: `python script1 --name <some-name> --age <some-age>`

subprocess.call(["python","--name",name,"--age",age])
# You can also store the command:
command = ["python",age]
subprocess.call(command)