def time_stamp():
    from datetime import datetime
    now= str(datetime.now())
    print (now[0:16])

def verification(data_value,unit):
        print("You have entered "+ str(data_value) + str(unit))
        verify=input("Is this correct? Yes/No")
        if verify.lower() =="yes":
            initial=input("Please enter your initials to verify that the value entered is correct.")
            return initial
        else:
            print ("Please enter the correct value.")