Python Ninja Bootcamp 22-Method & Function

by SN Gurukul on October 14, 2018 in Basic Python

Learn Python like a Professional! Take You from 0 to Hero

In this Python lecture, we will learn about the Method & Function.

Method in python

"Method is a function that belongs to an object"

Let's see some example-

l=[5,4,3,2,1]

print(l)

>>[5,4,3,2,1]

l.append(0) # add 0 at the End of list

>>[0]

Note: If Press TAB after l. in the jupyter notebook. It will show the all the Methods available in list.

print(l)

>> [5,4,3,2,1,0]

Let's try another method

l.sort() # Sort the list in ascending order

print(l)

>> [0,1,2,3,4,5]

Note: If Press SHIFT+TAB after l.sort in the jupyter notebook. It will show the documentation of that Method.

If we are using another IDE, we could use HELP function to show documentation

help(l.sort)

>> Help on built-in function sort:

   sort(...) method of builtins.list instance
   L.sort(key=None, reverse=False) -> None -- stable sort *IN PLACE*

Function in python

"Function is a group of related statements or could say reusable code that put together perform a specific task"

Let's see some example-

def first_function():
    print('hello')
    print('Tamta')

first_function()

>>hello
Tamta

Parameter in function

It's used to Pass the values to the function

def second_function(name):
    print('hello')
    print(name)

second_function('Dheru')

>>hello
Dheru

Default Parameter

Parameters initialized with default values if no value or undefined is passed.

def second_function(name='Piku'):
    print('hello')
    print(name)

second_function()

>>hello
Piku

Return to Function

If any value is send back to the calling function is called as return to function

def sum_function(a,b):
    return a+b

print(sum_function(1,2))

>>3

EDITS ARE WELCOMED!!

In the next Blog, we will discuss Lambda Expression

https://sngurukuls247.blogspot.com/2018/10/python-ninja-bootcamp-23-lambda.html

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View the Jupyter Notebook for this lecture