如何在Python中将用户输入从一个脚本传递到另一个脚本？

Question

I'm creating a GUI application using PyQt5 and am struggling with passing a user input retrieved from a QLineEdit in the first script into the second script. The first script is a log-in page and I am trying to pass the username entered in the line edit box into the main application (which is a separate file) as it needs to be displayed in that interface.

I have researched this and have only come across methods which pass fixed variables such as 'x = 5' (constants) rather than a user input. How would I go about using a variable that could change at runtime? I have tried the

from __main__ import *

method in the called file and I've tried to convert the username variable into a string using 'str(username)' and setting the variable as global but it seems I still get the same error and when the second file is called and it crashes with no error being displayed. Here is the relevant code taken from different areas of the script:

file1.py

import os

global username
username = self.lineEdit_username.text()
username = str(username)
import file2
MainWindow.close() 
os.system('file2.py') 

file2.py

from __main__ import *
print(username)  # just to check if the variable has been imported

I've tried researching this as much as I can before posting this but if I have missed a solution somwhere else please point me in the right direction.

Thanks for the help

Answer 1

The easiest way I have done this, especially with PyQt, is utilizing classes and importing the file as a module. See the example below.

Pass_variable.py:

import tkinter as tk
class user_input(object):
    def get_input(self):
        def get_text():
            self.entry = user_entry.get()
            print(self.entry)
            root.destroy()

        root = tk.Tk()

        root.title('Name')

        user_entry = tk.Entry(root)
        user_entry.pack()
        user_entry.focus_set()

        okay_button = tk.Button(root,text='okay',command=get_text)
        okay_button.pack(side='bottom')
        root.mainloop()

retrieve_variable.py:

from Pass_variable import user_input

x = user_input()
x.get_input()
print(x.entry)

so you are basically importing the class user_input from the file Pass_variable , assigning x to the class and then anything that is under self is now stored in the x variable. So x.entry is the same thing as calling self.entry inside the pass_variable.py file.

Does this make sense?