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Re: line_profiler: what am I doing wrong?

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Steven D'Aprano wrote:

> Neal Becker wrote:
> 
>> I inserted
>> @profile
>> def run(...)
>> 
>> into a module-level global function called 'run'.  Something is very wrong
>> here. 1. profile results were written before anything even ran
>> 2. profile is not defined?
> 
> Well, is it defined? Where does it come from?
> 
> If you defined it yourself, it needs to be defined before you can use it.
> This won't work:
> 
> 
> @profile
> def run(...)
> 
> def profile(func): ...
> 
> 
> Swap the order of profile and run and it should work. (Give or take any
> additional bugs in your code.)
> 
> 
> If you've imported it from an external module, how did you import it?
> 
> 
> import some_module
> 
> @some_module.profile
> def run(...)
> 
> 
> should work. So will this:
> 
> 
> from some_module import profile
> 
> @profile
> def run(...)
> 
> 
> But this won't:
> 
> 
> import some_module
> 
> @profile
> def run(...)
> 
> 
> and will fail with NameError, exactly as you are experiencing.
> 
> 
> 
> 

To quote from https://pypi.python.org/pypi/line_profiler/

$ kernprof -l script_to_profile.py
kernprof will create an instance of LineProfiler and insert it into the 
__builtins__ namespace with the name profile. It has been written to be used as 
a decorator, so in your script, you decorate the functions you want to profile 
with @profile.

@profile
def slow_function(a, b, c):
    ...

I've used it before (maybe 1 year ago), don't know why it isn't working now.
-- 
-- Those who don't understand recursion are doomed to repeat it

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line_profiler: what am I doing wrong? Neal Becker <ndbecker2@gmail.com> - 2015-02-10 19:06 -0500
  Re: line_profiler: what am I doing wrong? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-11 11:27 +1100
    Re: line_profiler: what am I doing wrong? Neal Becker <ndbecker2@gmail.com> - 2015-02-10 19:45 -0500
      Re: line_profiler: what am I doing wrong? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-11 12:17 +1100
        Re: line_profiler: what am I doing wrong? Robert Kern <robert.kern@gmail.com> - 2015-02-11 15:42 +0000
          Re: line_profiler: what am I doing wrong? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-12 10:02 +1100
        Re: line_profiler: what am I doing wrong? Neal Becker <ndbecker2@gmail.com> - 2015-02-13 08:33 -0500

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