Exactly. So sum() is not in any Python file, because it's written in C and part of the standard Python built-ins. If you wanted to see the C source, you could download the Python source code and look for it there. But it probably wouldn't be very enlightening, unless you are interested in writing a module in C.
Aaron Meurer On Tue, Mar 6, 2012 at 9:47 AM, Sean Vig <[email protected]> wrote: > If you are using ipython, you can use the introspection feature, for example > 'sum?', which displays a bunch of information about the function or class, > including the docstring. Extra details can be found using 'sum??'. > > As a side note, sum() is a built-in python function, and we do not override > it. There is summation(), which is the sympy function for evaluating sums. > > Sean > > > On Tue, Mar 6, 2012 at 10:28, prateek papriwal <[email protected]> > wrote: >> >> suppose if i want to know sum() function is located in which python file >> ? how to know this >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/sympy?hl=en. > > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/sympy?hl=en. -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
