cleanup and comments

user interface

csv_logging.py

@@ -1,12 +1,15 @@
 # This file contains functions related to logging data from the program to a CSV file.
 # They are mainly but not only called by the ConfigureLogging class in User_Interface.py.
 
+# import packages
 import pandas as pd
 import globals as g
 from datetime import datetime
 import os
 from tkinter import filedialog
 from tkinter import messagebox
+
+# import other project files
 import User_Interface as ui
 
 log_data = pd.DataFrame()  # pandas data frame containing the logged data, in-program representation of csv/excel data