python one more stupid debug
Question: sorry, i am a bit of a pain but i damaged my code, i cannot understand what is
wrong. I just removed a if statement but now it appears the timedelta is not
recognized anymore and it breaks the code. I am pretty sure i havent removed
any of the reference though. I am scratching my head but cannot find what is
the problem..

Would you know what went wrong?

    
    
    import random
    import datetime
    import csv
    from itertools import groupby
    
    
    
    def generator():
    
        i=0
        while 1:
            yield random.randint(-1, 1), datetime.datetime.now()
            i=i+1
    
    
    def keyfunc(timestamp,interval):
        xt = datetime.datetime(2013, 4,4)
        dt=timestamp
        delta_second =(dt - xt).seconds
        normalize_second = (delta_second / (interval*60)) * (interval*60)
        newtime = xt + timedelta(seconds=normalize_second)
        return newtime
    
    
    mynumber = 100
    for random_number, current_time in generator():
        mynumber += random_number
        reftime5min = keyfunc(current_time,5)
    
    
    print mynumber,",", current_time, reftime5min
    

the error i get now is:

    
    
    Traceback (most recent call last):
      File "", line 35, in 
      File "", line 28, in keyfunc
    NameError: global name 'timedelta' is not defined
    


Answer: Change `timedelta` to `datetime.timedelta`. You're not importing the
`timedelta` class directly, so you need to use the qualified name.

