defining a function inside a function in python3

Question

I am trying to define a function inside a function in python3 as

from gi.repository import Gtk, GObject

class EntryWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="Generate Init")
        self.set_size_request(100, 50)
        self.nument = Gtk.Entry()

        <did some work>

    def get_nument(self,nument):
      numele= self.nument.get_text()
      print(numele)
      <did some more work and define a function again>
        def get_specs(self,spec):
            numspec=self.spec.get_text()

resulting to an error:

Traceback (most recent call last):
  File "hw3.py", line 42, in get_nument
    self.spec.connect("activate",self.get_specs)
AttributeError: 'EntryWindow' object has no attribute 'get_specs'

I am really new to python, so trying hard for understanding the scope of self and origin of this error. Also, possibly I am doing things really funny by declaring a function inside a function, according to this post.

What I need is to define a function(get_specs) which will be called by another function (get_nument).

This is actually a gtk3 code, but I guess its problem with python. The complete code, at its present state can be seen here. Kindly help.

Class scope is class scope. Function scope is function scope. They are two disjoint entities. — Ignacio Vazquez-Abrams, Mar 23 '14 at 20:08
So that calling the function get_specs from get_nument work without error — BaRud, Mar 23 '14 at 20:37
It's already in `get_nument()`. Just call it as you would any other function in scope. — Ignacio Vazquez-Abrams, Mar 23 '14 at 20:38

score 0 · Answer 1 · answered Mar 23 '14 at 20:50

This:

File "hw3.py", line 42, in get_nument
  self.spec.connect("activate",self.get_specs)

In get_nument, reference get_specs as just get_specs. So, try:

self.spec.connect("activate", get_specs)

It's just a function that you've declared in the scope of get_nument, so it's just like any variable. An example:

def foo(self):

    x = 34
    def bar():
        # ...

    # Use x:
    print(x)
    # Use bar:
    print(bar())  # Note: no self, because bar isn't part of self.

defining a function inside a function in python3

1 Answers1