我试图将一个变量从一个 python 文件传递​​到另一个 python 文件

Question

sample_box.py

gr=0

class SampBoxLayout(BoxLayout):

    def input_rpm(self, instance, value):
        if value is True:
            global gr
            gr=22

pyth.py

from sample_box import gr

while(True):
    if(gr== '22'):

Answer 1

Try creating a constant instead of a normal variable:

GR = 0

and then import it:

import sample_box

To get the constant, use the syntax:

sample_box.GR

Add this to your code to prevent the import statement to run sample_box.py:

GR = 0
if __name__ == "__main__":
    # all your code that you don't want to run here