Uncertanity.py

import csv
import sys
import os
import tkinter.filedialog
import tkinter


def findNumbers(data):
    maxV = max(data)
    minV = min(data)
    avg = 0
    for i in range(len(data)):
        avg += data[i]
    avg = avg/len(data)
    uncertainty = max((maxV - avg), (avg-minV))

    print("The max value is: " + str(maxV))
    print("The min value is: " + str(minV))
    print("The average value is: " + str(avg))

    print("Max - Avg: " + str(maxV-avg))
    print("Avg - Min: " + str(avg-minV))
    print("The Uncertaninty is " + str(uncertainty))


def user_input(folder):
    data = []
    outlier = -1
    fileIn = find_file(folder)
    csv_reader = csv.reader(fileIn, delimiter='\n')
    for item in csv_reader:
        data.append(item[0])
    fileIn.close()
    for i in range(len(data)):
        string = data[i]
        if(string[0] == "O"):
            outlier = i
        else:
            data[i] = float(data[i])
    if(outlier >= 0):
        string_outlier = data.pop(outlier)
        print("\nThere was an outlier, your outlier was " +
              str(string_outlier[1:])+ "\n")
    return data


def find_file(folder):
    fileExists = False
    user_quit = False
    fileName = input('Please enter a data file name: ')
    while fileExists == False:
        try:
                fileIn = open(folder + "\\" + fileName, 'r')
                fileExists = True
        except:
            fileName = input('An error occured trying to read the file.'
                             + ' That file may not exist. Please try again: ')

    return fileIn

def find_root():
    root = tkinter.Tk()
    root.withdraw()
    dirname = tkinter.filedialog.askdirectory(parent=root,initialdir="/",title='Please select a directory')
    return dirname

def main():
    repeat = "Y"
    print("Type \"Quit\" at any time to stop the program")
    folder = find_root()
    while repeat.upper() == "Y":
        os.system('cls' if os.name == 'nt' else 'clear')
        data = user_input(folder)
        findNumbers(data)
        repeat = input("Do you have another CSV?(Y/N) ")
        


main()