Error in a file and problem with ptpython

[sylas]

I tried this:

  # Initiates Timer class object
        #t = Timer()
        t = Timer#added
        start_time = t.start()

and the new error is:

Error:
Please input an integer: 145
Traceback (most recent call last):
  File "big.py", line 226, in <module>
    new_program()
  File "big.py", line 42, in new_program
    load_program()
  File "big.py", line 71, in load_program
    start_time = t.start()
TypeError: descriptor 'start' of '_timer.Timer' object needs an argument
sylvain@sylvain-HP-Laptop-15-bw0xx:~$