[Python] Opening an Excel File with Python [duplicate]

I've been trying to figure this out for a couple of days now, and I cannot seem to get it. I simply need to open an existing Excel file, then I'll do some stuff with it, but I cannot seem to get the Excel file to open.

Here's what I've tried most recently:

import pyautogui
import openpyxl
from openpyxl import load_workbook
import pathlib
from pathlib import Path

wb_folder = Path("C:/Users/reber/Gaming/Rise of Castles/Member_Details/")

#md_wb = openpyxl.load_workbook('C:\Users\reber\Gaming\Rise of Castles\Member_Details\Member_Details.xlsx')
#md_wb = openpyxl.load_workbook('C:\Users\reber\Gaming\Rise of Castles\Member_Details\Member_Details.xlsx')
#md_wb = openpyxl.load_workbook(r'C:\Users\reber\Gaming\Rise of Castles\Member_Details\Member_Details.xlsx')
#md_wb = openpyxl.load_workbook(r"C:\Users\reber\Gaming\Rise of Castles\Member_Details\Member_Details.xlsx")
md_wb = wb_folder / "Member_Details.xlsx"

f = open(md_wb)

p = pathlib.Path(__file__)
print (p)

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