Python 101

@adityaramteke

Python Pune

Time to Brush up your Basics &

Learn Python 3  skills

Using Interpreter.

>>> print("Hello World")
Hello World

Comments

>>> # This is a comment
>>> # print("Hello World!")
...
>>> 

Variables and Datatypes

Read User Input.

>>> number = int(input("Enter a number: "))
Enter a number: 5
>>> print(number)
5

>>> name = input("Enter your name: ")
Enter your name: Aditya
>>> print(name)
'Aditya'

Decision Making and Flow Control

If statement

if expression:
    do this

elif expression:
    do this

else: 
    do this

for loop

for var in sequence:
    statement

List

supports multiple data types

>>> list = [1, 2, "hello", 1.0]
>>> list
[1, 2, 'hello', 1.0]

Lists Comprehensions

>>> a = [1, 2, 3]
>>> [x ** 2 for x in a]
[1, 4, 9]

Tuple

>>> tuple = ('Fedora', 'Debian', 10, 12)
>>> tuple
('Fedora', 'Debian', 10, 12)

Dictionary

>>> data = {'os':'Fedora', 'kart':'Debian', 'Jace':'Mac'}
>>> data
{'os': 'Fedora', 'Jace': 'Mac', 'kart': 'Debian'}

Set

>>> a = set('abcthabcjwethddda')
>>> a
{'a', 'c', 'b', 'e', 'd', 'h', 'j', 't', 'w'}

Function

>>> def function(params):
...     statement

>>> def sum(a, b):
...     return a + b
... 

>>> res = sum(2, 3)
>>> res
5

Lambda Expression

>>> sum = lambda x, y: x+y
>>> sum(2, 3)
5

Class

>>> class ClassName:
...     """ Optional class documentation string. """
...     class_suite
>>> 

File Handling.

>>> f = open("abc.txt", "w")    # Open file in written mode.
>>> f.write("Programming with Python id Fun! ")
>>> f.close()    # Closed opened file.
>>> 

Questions?