如何通过Python文件在控制台中运行功能？

Question

I have created this function in a Python file:

def abc (xyz):
    return xyz

I saved the file in /var/www/ with the file name a.py .

Now I want to run this function in an Ubuntu console and pass a parameter to this function. How can I do this? I have tried this:

jaskaran@jaskaran-Vostro-1550:/var/www$ python3 a.py

This does not show me any error. How can I call the function and be able to see the output in the console?

Answer 1

The script is running, it just that it only defines the function, it does not execute it. You need to invoke the function from within your Python script. Typically this is done like this:

def abc(xyz):
    print(xyz)

if __name__ == "__main__":
    abc(123)

You can pass command line arguments to abc() like this:

import sys

def abc(xyz):
    print(xyz)

if __name__ == "__main__":
    abc(sys.argv[1])

Then you can run it from your shell command line:

$ python script.py 123546
123456

As you can see, the command line argument "123456" was passed to abc() from the sys.argv list which represents the arguments passed to the script (sys.argv[0] is the script name).

Answer 2

first thing if you want to run the method abc

you need to know many things main() the excution of program starts from main() in python

 def abc(xyz):
       return xyz
 if __name__ == "__main__":
      abc("sundar")

to pass arguments like below you need to use sys.argv

$python a.py "sundar"

import sys
def abc(xyz):
    return xyz
if __name__ == "__main__":
    print abc(sys.argv[1])

#output sundar

The Python sys module provides access to any command-line arguments via the sys.argv . sys.argv is the list of command-line arguments and Here sys.argv[0] is the program ie. script name.

Answer 3

Try using something like this:

def abc(xyz):
    print(xyz)

if __name__ == "__main__":
    abc(input("Enter something: "))

This will print in the console what you enter as input! ;)

i hope this helps

Answer 4

$ python     
Python 2.7.6 (default, Mar 22 2014, 22:59:56) 
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.

>>> from a import abc
>>> abc(123)
123
>>>