[Tutor] int uncallable

[cgw501@york.ac.uk]

Hi,

This code:

for line in satFile:
    lineListed = line.split()     
    start = int(lineListed[5])-1
    end = int(lineListed[6])
    hitLength = end - start
    extra = len(lineListed[9])
    total = hitLength + 2(extra)

gives an error:

Traceback (most recent call last):
  File "test2.py", line 29, in ?
    total = hitLength+ 2(extra)
TypeError: 'int' object is not callable

which confuses me. Why can't I call extra? Have I not called int objects 
when I define hitLength, and that works fine.

Thanks,

Chris