如何在 Python 中将参数传递给导入的脚本

Question

我有一个如下形式的脚本 (script1.py)：

#!/bin/python

import sys

def main():
    print("number of command line options: {numberOfOptions}".format(numberOfOptions = len(sys.argv)))
    print("list object of all command line options: {listOfOptions}".format(listOfOptions = sys.argv))
    for i in range(0, len(sys.argv)):
        print("option {i}: {option}".format(i = i, option = sys.argv[i]))

if __name__ == '__main__':
    main()

我想将此脚本导入另一个脚本 (script2.py) 并传递给它一些参数。脚本script2.py 可能如下所示：

import script1

listOfOptions = ['option1', 'option2']
#script1.main(listOfOptions) insert magic here

如何将script2.py 中定义的参数传递给script1.py 的主函数，就好像它们是命令行选项一样？

那么，例如，执行以下操作是否符合 Python 风格？：

import script1
import sys

sys.argv = ['option1', 'option2']
script1.main()

Answer 1

单独的命令行解析和调用函数

为了代码的可重用性，将执行函数与命令行解析分开是很实用的

scrmodule.py

def fun(a, b):
    # possibly do something here
    return a + b

def main():
    #process command line argumens
    a = 1 #will be read from command line
    b = 2 #will be read from command line
    # call fun()
    res = fun(a, b)
    print "a", a
    print "b", b
    print "result is", res

if __name__ == "__main__":
    main()

从其他地方重复使用它

from scrmodule import fun

print "1 + 2 = ", fun(1, 2)

Answer 2

# script1.py
#!/bin/python

import sys

#main function is expecting argument from test_passing_arg_to_module.py code.
def main(my_passing_arg):
    print("number of command line options:  {numberOfOptions}".format(numberOfOptions = len(sys.argv)))
    print("list object of all command line options: {listOfOptions}".format(listOfOptions = my_passing_arg))
    print(my_passing_arg)
if __name__ == '__main__':
    main()

#test_passing_arg_to_module.py
import script1
my_passing_arg="Hello world"
#calling main() function from script1.py code.
#pass my_passinga_arg variable to main(my_passing_arg) function in scritp1.py. 
script1.main(my_passing_arg)
##################
# Execute script
# $python3.7 test_passing_arg_to_module.py
# Results.
# number of command line options:  1
# list object of all command line options: Hello world
# Hello world