Python Nested call, namespace

Nested calls to Functions:

In the process of calling a function, another function is Called.

defprint(' frombar')  defPrint ('fromfoo') bar () foo ()

Nested Definitions of Functions:

In the interior of a function, another function is Defined.

A name defined inside a function that can only be used internally and cannot be used externally

def F1 ():     = 1    def  F2 ():        print('fromf2')         Print (x)     # Print Value        Print (f2)    # Print memory address     f2 () F1 ( )

Name Space:

Where the name is stored, exactly where the name and the value of the variable are bound

Also can be divided into: built-in namespaces, global namespaces, local namespaces

Built-in Namespaces:

Generated when the Python interpreter starts, storing some python built-in names, len (), if

Global Namespaces:

Generated when executing a file, holding the name of a file-level definition

X=1

def func ():
Pass

Import OS

Class Foo:
Pass

If x==1:z=3

Local Namespaces:

Python Nested call, namespace