Python Tutorial

Basic python programming code

Variables

Strings

Conditional statements

Oops

File handling and Exceptions

Modules

Data structures

The classic hello world program

      print("Hello World")

      print(f"Hello world") # f-strings

      print('Hello World')
 
      print("Hello ,I am Ironman")

variables

variables store data

  name = "John wick"
  age = 39
  occupation = "Assassin"
  height = 6.1
  net = 50_00_000
  print(name,age, occupation , height , net)

Operators

• Arithmetic operators The Mathetical operations in python using Arithmetic operators.Python can be used as a calculator

   apples = 11
   mangoes = 9
  
   print(apples + mangoes)
  
   print(apples - mangoes)
  
   print(apples / mangoes)
  

• Membership operators

    # memebership operators in, not is
  
   nums=[1,2,3]
   print("\n",3 in nums)
  
  cake="strawberry"
  print("\n","berry" in cake)
  print("\n", "mango" in cake)
  
  # i mean literally numbers are not cake (-__-)
  print("\n")
  print(cake is not nums)
  
  
   # id() one of the most impoertant function , it shows th storage location of a variable in the memory of cpu 
   # it changes location everytime you run
  
  score=9049
  print(id(score))
  

• Relational operators The comparison operators that gives a boolean 'True' and 'False'

   """ > greater than
       < lesss than
       != not equal 
       >= greater than or equal to
       <= less than or equal to
   """
    a = 3
    b = 6
    c = 9
    print(a>b)
    print(a<b)
    print(b<c)
    print(c>=a)
  

• Logical operators The logical operators are and , or

Strings

A sequence data type which stores a character (i.e A group of characters is called a string or just one character sometimes :) In python anything in between quotes either " " or ' ' is a string

   name="Ironman"
   space="" # just one space character
   nums="123456789"
   symbols="!@#$%^&*()"
   pc='tron'

   # strings can be concatenated using " + " 

   
   print(name + space + nums + symbols + pc)
   print(name +" "+ space+" "+ nums +" "+ symbols +" "+ pc)
   print("Hello"+","+"Everyone")

Conditionals

if statements Loops

• if statements
• elif
• else

if statement

      age =19
      if age > 18:
          print("You can drive")
      print("Bye")

else Statement

    name = input("Enter passkey")
    # passkey = "Naruto"
    if name == "Naruto":
        print("You may pass")
    else:
         print("Not allowed")

elif statement (elseif)

name = input("Enter pass key")
if passkey == "Naruto":
    print("You may pass")
elif:
   print("You misplaced the key")

else:
  print("Not allowed")