Is A Python Function Stored As An Object?

This query is in continuation with link to understand further on this point: In the case of functions, you have an object which has certain fields, which contain e. g. the code

Solution 1:

All this is saying is that, in Python, functions are objects like any other.

For example:

In [5]: def f(): pass

Now f is an object of type function:

In [6]: type(f)
Out[6]: function

If you examine it more closely, it contains a whole bunch of fields:

In [7]: dir(f)
Out[7]: 
['__call__',
 ...
 'func_closure',
 'func_code',
 'func_defaults',
 'func_dict',
 'func_doc',
 'func_globals',
 'func_name']

To pick one example, f.func_name is the function's name:

In [8]: f.func_name
Out[8]: 'f'

and f.func_code contains the code:

In [9]: f.func_code
Out[9]: <code object f at 0x11b5ad0, file "<ipython-input-5-87d1450e1c01>", line 1>

If you are really curious, you can drill down further:

In [10]: dir(f.func_code)
Out[10]: 
['__class__',
 ...
 'co_argcount',
 'co_cellvars',
 'co_code',
 'co_consts',
 'co_filename',
 'co_firstlineno',
 'co_flags',
 'co_freevars',
 'co_lnotab',
 'co_name',
 'co_names',
 'co_nlocals',
 'co_stacksize',
 'co_varnames']

and so on.

(The above output was produced using Python 2.7.3.)