#Loading a file
filename = input("Please enter .csv filename: ")
path = os.listdir(os.getcwd())

#*If the file is in the path, the code will run*
if filename in path[:len(path)]:
        print("nData has been loaded!n")
        loadcsv = pd.read_csv(filename, header = None, names = cols)
        cols = ['StudentID', 'Name']
        if (loadcsv.iloc[0] != cols).all():
            print("The uploaded file is not valid")
        break
else:
        print("nFile has not been found.")
        #File upload gets reset if not found in listdir.
        loadcsv = np.array([])

filename = input("Please enter .csv filename: ")
            path = os.listdir(os.getcwd())

            #*If the file is in the path, the code will run*
            if filename in path[:len(path)]:
                    print("nData has been loaded!n")
                    loadcsv = pd.read_csv(filename)
                    cols = ['StudentID', 'Name']

                    for c in loadcsv.columns:
                        if c not in cols:
                            print("The uploaded file is not valid")
                    break
            else:
                    print("nFile has not been found.")