CODEWITHSUNDEEP
pythonvariables
Zulex
Zulex

Reputation: 1

2 python files and 1 main.py passing variables betwoon those files

To make a clear structure for my project I try to keep different parts in different file.py. And I use one main.py to start the scripts together(threaded). Now I want to get one datetime.datetime variable into the other script.

For example : 

#main.py
import file1
import file2
if __name__=='__main__':
    p1 = Process(target = file1.a)
    p1.start()
    time.sleep(1)
    p2 = Process(target = file2.b)
    p2.start()

#file1.py
def a():
    global t1
    t1 = datetime.datetime(example date)

#file2.py
def b():
    print(t1)

The error I get is the following : 

Traceback (most recent call last):
File "location\main.py", line 7, in <module>
import test2
File "location\file2", line 3, in <module>
b()
File "location\file2", line 2, in b
print(t1)
NameError: name 't1' is not defined

What am I doing wrong? Importing file1 in file 2 doesn't seem to work too. Should I just be putting all the scripts in one file?

If I miss any info, just ask:) Thanks!

Upvotes: 0

Views: 47

Answers (2)

Valkyrie
Valkyrie

Reputation: 861

Try this:

t1=0
def a():
    t1=datetime.datetime(example date)

setting t1 outside of the method definition should make it accessible when the file is imported (file1.t1, obviously).

Upvotes: 0

Born2Discover
Born2Discover

Reputation: 145

As the traceback says, error comes from the fact that global t1 is undefined.

If you posted the entire code, then the error is in

#file1.py
def a():
    global t1 # Python interpreter can not find this variable.
    t1 = datetime.datetime(example date)

However if you want to share ressources between processes, then consider the multiprocessing module.

Upvotes: 2

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