why i can't get the sourcecode with inspect module?

[Dave Angel]

luofeiyu <elearn2014 at gmail.com> Wrote in message:
>  >>> import inspect
>  >>> def changer(x,y):
> ...     return(x+y)
> ...
>  >>> dir()
> ['__builtins__', '__doc__', '__loader__', '__name__', '__package__', '__
>   'changer', 'inspect']
>  >>> inspect.getsource(changer)
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "D:\Python34\lib\inspect.py", line 830, in getsource
>      lines, lnum = getsourcelines(object)
>    File "D:\Python34\lib\inspect.py", line 819, in getsourcelines
>      lines, lnum = findsource(object)
>    File "D:\Python34\lib\inspect.py", line 667, in findsource
>      raise OSError('could not get source code')
> OSError: could not get source code
>  >>>
> 

To put it simply,  inspect can get the source if it's in python, 
 and if it's in a file visible on your own system from the same
 location it was built from.

Since your function was built interactively,  inspect cannot find
 any source. 

-- 
DaveA