在另一个文件中使用从无限循环 function 返回的变量

Question

I know the title may sound a bit confusing but here is my struggle:

I have two separate files, one is only for gathering data and converting (data_.py) it and the second is main program file (main_.py). The core function in data_.py looks like this (it is simplified ofc):

def some_function():
    #here some python magic happens
  while True:
    #more magic
    return var1, var2, var3

variables are updated every few seconds. Now Im trying to use them in main_.py, so far I have this:

import data_

var1, var2, var3 = data_.some_function()

and when I print my variables everything works, but of course they are imported only once and not updated after.

I've tried doing this:

import data_

while True:
    var1, var2, var3 = data_.some_function()
    print(var1, var2, var3)

to update them as frequently as possible, yet they aren't updating for some reason.

Is there a way to achieve this while keeping function in separate files?

Answer 1

The functionality you are looking for is generator. Below is sudo code for your case

you define you function like this. you gather and convert data and when a chunk of data is ready to be processed you give that to other code calling this function. But this is not parallel processing. your some_function() pauses until that data is being processed.

def some_function():
    #here some python magic happens
    while True:
        #more magic
        yield var1, var2, var3

then you use this function like below. the loop continues until while loop on some_function is not finished

for var1,var2,var3 in some_function():
    print(var1, var2, var3)

Working Example

def some_function():
    for x1, x2 in zip(range(1000),range(0,2000,2)):
        yield x1,x2


for x1,x2 in some_function():
    print(x1,x2)