Tutorial Reference

test.py

company = {"activa": "Bajaj", "access": "Suzuki", "zest": "TVS"}

def get_company(scooter):
    return company.get(scooter)

scooter = input("Enter Scooter:")

print(f"{scooter} is manufactured by {get_company(scooter)}")


# ----------------
# Class
# ----------------
class Abc:
    pass

# ----------------
# Functions
# ----------------

# a) Required Arg
def my_func(x):
    return x*2

my_func()


# b) Keyword Arg.
def my_func_keyword(x):
    return x*2

my_func_keyword(x=5)


# c) Default Arg.
def my_default_arg(number=2):
    return number*2

my_default_arg()
my_default_arg(5)
my_default_arg(number=6)


# d) Variable Length
def variable_length_arg(*arg):
    for each in arg:
        print(each)


# ANONYMOUS Functions
x = lambda x: x*2




# --------------------------
# Pure Functions
# --------------------------
def multiply(x, y):
    return x*y

# --------------------------
# Recursion
# --------------------------
def fib(n)
    if (n <= 1)
        return 1;
    else
        return fib(n - 1) + fib(n - 2);


# ------
# First Class Citizens
# ------
def multiply(x):
    return x*2

def get_number(x, multiply):
    return m(x)

get_number()


# -----
# Class Constructor
# -----
class Abc:
    def __init__(self):
        print("Contructor is called.")

# --------
# Types
# --------

# a) Integer
x = 1

# b) Float
y = 1.1

# c) Complex
z = 1+2j

# d) String
a = "Hello World."

# e) List
b = ["a", "b", "c"]

# f) Tuple
c = ("a", "b")

# g) Boolean
d = True

# h) Set
e = {"a", "b"}

# i) Dict
f = {"a": "A", "b": "B"}
# ******************************
# Loops

# a) while loop
i = 1
while i < 6:
  print(i)
  i += 1

# b) for loop
fruits = ["apple", "banana", "cherry"]
for x in fruits:
  print(x)

# *********************
# Exception handling

try: 
    print(a)
except Exception as e:
    print("Exception occured.")
    



# ******************************

# Inheritance

# a) Single Level
# Base class
class Parent:
     def func1(self):
          print("This function is in parent class.")
 
# Derived class
class Child(Parent):
     def func2(self):
          print("This function is in child class.")
 
# Driver's code
obj = Child()
obj.func1()
obj.func2()

# ******************************


# b) Multiple

# Base class1
class Mother:
    mothername = ""
    def mother(self):
        print(self.mothername)
 
# Base class2
class Father:
    fathername = ""
    def father(self):
        print(self.fathername)
 
# Derived class
class Son(Mother, Father):
    def parents(self):
        print("Father :", self.fathername)
        print("Mother :", self.mothername)
 
# Driver's code
s1 = Son()
s1.fathername = "RAM"
s1.mothername = "SITA"
s1.parents()

# ******************************

# c) MultiLevel

# Base class
class Grandfather:

	def __init__(self, grandfathername):
		self.grandfathername = grandfathername

# Intermediate class
class Father(Grandfather):
	def __init__(self, fathername, grandfathername):
		self.fathername = fathername

		# invoking constructor of Grandfather class
		Grandfather.__init__(self, grandfathername)

# Derived class
class Son(Father):
	def __init__(self,sonname, fathername, grandfathername):
		self.sonname = sonname

		# invoking constructor of Father class
		Father.__init__(self, fathername, grandfathername)

	def print_name(self):
		print('Grandfather name :', self.grandfathername)
		print("Father name :", self.fathername)
		print("Son name :", self.sonname)

# Driver code
s1 = Son('Prince', 'Rampal', 'Lal mani')
print(s1.grandfathername)
s1.print_name()

# ******************************
# Hierarchical

# Base class
class Parent:
	def func1(self):
		print("This function is in parent class.")

# Derived class1
class Child1(Parent):
	def func2(self):
		print("This function is in child 1.")

# Derivied class2
class Child2(Parent):
	def func3(self):
		print("This function is in child 2.")

# Driver's code
object1 = Child1()
object2 = Child2()
object1.func1()
object1.func2()
object2.func1()
object2.func3()