Python Tutorials
Python Introduction
Python Get Started
Python Syntax
Python Comments
Python Variables
Python Data Types
Python Casting
Python Strings
Python Booleans
Python Operators
Python Lists
Python Tuples
Python Sets
Python Dictionaries
Python If...Else
Python While Loops
Python For Loops
Python Functions
Python Lambda
Python Arrays
Python Classes/Objects
Python Inheritance
Python Iterators
Python Scope
Python Modules
Python Dates
Python Math
Python JSON
Python RegEx
Python PIP
Python Try..Except
Python User Input
Python String Formatting
Python File Handling
Python File Handling
Python Read Files
Python Create/Write Files
Python Delete Files
Python Modules
Python Numpy
Python Pandas
Python SciPy
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Python Scope
Variables are only available within the built-in region. This is called width.
Local Scope
The variables created within the function are based on the local scope of that function, and can only be used within that function.
Example
A variable created inside a function is available inside that function:
def myfunc():
x = 300
print(x)
myfunc()
Function Inside Function
As described in the example above, variable x is not found outside the function, but is available in any function within the function:
Example
The local variable can be accessed from a function within the function:
def myfunc():
x = 300
def myinnerfunc():
print(x)
myinnerfunc()
myfunc()
Global Scope
The variables created by the Python coding body are global variables and are of global scope.
Global variables are available anywhere, global and local.
Example
A variable created outside of a function is global and can be used by anyone:
x = 300
def myfunc():
print(x)
myfunc()
print(x)
Naming Variables
If you use the same dynamic word in and out of work, Python will treat them as two different variables, one available worldwide (outside of work) and one available locally (within-function):
Example
The function will print the local x, and then the code will print the global x:
x = 300
def myfunc():
x = 200
print(x)
myfunc()
print(x)
Global Keyword
If you need to create a global variable, but stick to a wide area, you can use a global keyword.
Global keyword makes dynamics more global.
Example
If you use the global keyword, the variable belongs to the global scope:
def myfunc():
global x
x = 300
myfunc()
print(x)
Also, use a global keyword if you want to make a change in the global variable within a function.
Example
To change the value of a global variable inside a function, refer to the variable by using the global keyword:
x = 300
def myfunc():
global x
x = 200
myfunc()
print(x)