Get Documents directory with python automatically

I need to automatically get the document folder address of any Windows with Python.

Currently in my script I determined it as shown in the variable main_folder , however whenever I change from PC I have to change that address. Below is also one of the uses of this variable in my script .

Creating directories and sub directories. If anyone knows any other method, I will be very grateful.

import arcpy
main_folder = r"C:\Users\Edeson Bizerril\Documents\myEBpy_Files"

# EXEMPLO DE USO
# Determinando diretório
input_folder = main_folder + "\Input\"
input_folder_SRTM = self.input_folder + r"SRTMs\"

create_folder(input_folder)

create_folder(input_folder_SRTM)

# Método para criação de diretórios
def create_folder(path):
    if not os.path.isdir(path):
        os.makedirs(path)

Unfortunately I need to determine the reference folder in my work, but I would like Python to automatically identify and return the exact same result in the main_folder variable.