[FIXED] Streamlit and Python, The problem of not using the return value of the function inside the other function and undesired path visual

Issue

The code:

#Libraries
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import os
import fitz 
import io
import streamlit as st

global path_input_0    #HERE ASSIGNMENTS-------------------------------
path_input_0=""
path_input_last=""

def login():
  
    # interface codes for the login screen
    path_input_0 =st.text_input("File Path:", "Please enter the path to the folder containing the Abstract_Account_Web_App.py file")
    st.write(path_input_0)
    global proceed
    if st.button("Proceed"):
        st.session_state["page"] = "main"
        st.balloons()
        st.experimental_rerun()
    return path_input_0


def main():
    # interface codes for the main screen
    
    pathz=path_input_last+"/Bankomat Alışveriş Özeti.pdf"
    st.write("path1:",pathz)
    file_names = [r'%s' % pathz]
    st.write(file_names)


if __name__=='__main__':
               
    if "page" not in st.session_state:
                  st.session_state["page"] = "login"
    
    if st.session_state["page"] == "login":
                 
                  path_input_last=login()
                  st.write("last:",path_input_last)
                  
     
    elif st.session_state["page"] == "main":
                  st.balloons()
                  main()

Main screen: (First login screen, after main screen)

Hello friends, I’m trying to take the path from the login screen and use it on the main screen. The login function returns the path_input_0 from the user. But I can’t get this output and use it in the main function Pathz=path_input_last+“/Bankomat Alışveriş Özeti.pdf”. Main function’s path_input_last comes as null.(“”) So it just prints path1 as /Bankomat Alışveriş Özeti.pdf. I don’t want that. The full file path is not coming. Secondly, file_names = [r'%s' %pathz] looks weird in the interface. My goal here was to take the file path as a variable and read it properly.

If I call login inside the main function again, I can get the variables I want, but this time the problem of calling the two interfaces together arises. It breaks this as my goal is to fetch the interfaces in order

How Can I solve these problems? Could you explain the solution?

Solution

def login():
    # interface codes for the login screen
    # (css,buttons,background,input area etc )
    path_input_0 = st.text_input(
        "File Path:",
        "Please enter the path to the folder containing the Abstract_Account_Web_App.py file",
        key="PATH_INPUT_LAST",
    )
    st.write(path_input_0)
    global proceed
    if st.button("Proceed"):
        st.session_state["page"] = "main"
        st.balloons()
        st.experimental_rerun()



def main():
    
    file0 = st.session_state["PATH_INPUT_LAST"]+"/Bankomat Alışveriş Özeti.csv"
    st.write(file0)
    if(os.path.exists(file0) and os.path.isfile(file0)):
      os.remove(file0)
      print("file was deleted as preprocessing")
    else:
      print("file was not found to delete")
    
    # interface codes for the main screen
    # (css,input,buttons etc.)
    def set_texts(pdf_files:list):
        print("starting to text process")
        #This function reads pdf and gets "CRC-32" components as texts
        for pdf_file in pdf_files:
            with fitz.open(pdf_file) as doc:
                text = ""
                for page in doc:
                    new_text = page.get_text()
                    text += new_text
            
                    return text
  



    pathz = st.session_state["PATH_INPUT_LAST"] + "/Bankomat Alışveriş Özeti.pdf"
    st.write("path1:", pathz)
   
    file_names = r'%s' % pathz
    
    st.write(file_names)
    set_texts([file_names])
   
 


if __name__ == "__main__":
    if "page" not in st.session_state:
        st.session_state["page"] = "login"

    if st.session_state["page"] == "login":
        login()

    elif st.session_state["page"] == "main":
        st.balloons()
        main()

Answered By - murat taşçı