How to pass the lists from one function to multiple functions in a class?

Question

I am trying to pass two lists to other functions. in one function it is executing as I am calling the total function using self. But I shouldn't call the same function in another method too, as the git clone will happen twice. Hence I need to pass the function return values to other function. Is there any way to do this? This total code I am writing in single class.

def open_close_lists(self):
    cmd = self.git_clone
    subprocess.check_output(cmd, shell=True)
    open_list = os.listdir('open')
    close_list = os.listdir('close')
    return open_list, close_list

I have another two functions

def fun1(self):
    here I need to use those two lists
def fun2(self):
    here I need to use those two lists

What does your class represent? Does it not make sense to add the two lists as instance attributes (`self.open_list` and `self.close_list`)? — Carcigenicate, Aug 25 '20 at 14:04
Does this answer your question? [Passing variables between methods in Python?](https://stackoverflow.com/questions/9520075/passing-variables-between-methods-in-python) — mkrieger1, Aug 25 '20 at 14:09
Hi, I tried this its giving attribute error as follows: rel_two = self.matchRel2(self.open_list, self.close_list) AttributeError: 'TestMatch' object has no attribute 'open_list' — SinghB, Aug 25 '20 at 14:11

score 3 · Answer 1 · answered Aug 25 '20 at 14:07

3

Here we create a class OpenCloseLists, and bind those lists to current instance.

Lists are now available using the self keyword.

NOTE: It's common to name classes in CamelCase and variable names with underscores.

import os

class OpenCloseLists:
    def __init__(self):
        cmd = self.git_clone
        subprocess.check_output(cmd, shell=True)
        self.open_list = os.listdir('open')
        self.close_list = os.listdir('close')
      
    def fun1(self):
        # self.open_list
        # self.close_list
    
    
    def fun2(self):
        # self.open_list
        # self.close_list

answered Aug 25 '20 at 14:07

Aviv Yaniv

6,188
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Hi Aviv, Its worked. Thanks a lot for the expeditious support :) – SinghB Aug 25 '20 at 14:25
@SinghB Welcome! Keep learning and success! Please mark as solved :) – Aviv Yaniv Aug 25 '20 at 14:26

score 0 · Answer 2 · edited Aug 25 '20 at 14:16

0

Use global variables. At the start of your function put

global self.mylist

edited Aug 25 '20 at 14:16

Dharman

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answered Aug 25 '20 at 14:10

MusicMan24

51
1
10

I will try this also . Thanks for your support MM – SinghB Aug 25 '20 at 14:26
You could also use global variables outside of a class and get rid of the' self.'. – MusicMan24 Aug 25 '20 at 14:43

How to pass the lists from one function to multiple functions in a class?

2 Answers2