Python Variable Scope And Lifetime
By Rajat PradhanIn this tutorial, we will learn the scope and Lifetime variables in Python. The scope is nothing but the visibility of variables and Lifetime is nothing but the duration which variable is exist
Local Variables inside a function in Python
- In the local variable, we will declare the variable inside the function.
- Here funt is the function name.
- ‘x’ is the variable.
For example
def funt()://it is function x='hello local variable'//variable inside function print(x) funt()//here it is function call
output hello local variable
Variable in function parameter in Python
- In the parameterizing variable, we passed the variable inside the function.
- We will pass the message inside the function declaration. That message we will get as output.
For example
def funt(x)://here 'x' is parameter for this function
print(x)
funt("hello parameter variable")//message passed inside function declearation
output hello parameter variable
global variable in Python
- In the global variable in the main body, the variable will be defined.
- It can access any part of the program
- the variable declared outside the function.
For example
x="welcome to global variable" def funt(): print(x)//it is calling inside the function funt()
print(x) //it is calling outside the function
output welcome to global variable welcome to global variable
Nested function variable scope in Python
- A function defined inside another function called nested function.
- It follows the LIFO structure.
For example.
x="first global"
def funt():
x="secocnd global"
print(x)
funt()
print(x)
output secocnd global first global
- In the above output, we can observe the LIFO in the function.
Two messages passed inside the function in two same name variables that variable message shows as output.
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