Day 3.ipynb

Kernel: Python 3

def test():
  print("HI All")

#Functions 
def demo(x,y):
    print(x+y)
    return(y)
demo(21,3)#will return the value that is allowed here it is X

Return() is not mandatory in Python

def cal(x,y,z):
    print("sum =",x+y+z)
    print("mul=",x*y*z)
cal(3,2,4)
cal(8,9,6)
cal(7,6,7)

Different variable class can be passed within a function

def Emp(name=" ",age=10,f=0.0):
  name=input("Enter your name")
  age = int(input("Enter your age="))
  exp= float(input("Experince="))
  print("Name=%s age=%d Exp=%f"%(name,age,exp))

Emp()

def data(name="",age=12,Gender="F"):
    print("Name=%s age=%d Gender=%s"%(name,age,Gender))
data("ROY",12,"M")
data("A",3,"F")

Use math module for mathemathical functions

import math 
x=int(input("Enter any number ="))
math.factorial(x)
math.exp(x)
math.pow(x,4)
math.acosh(x)
math.pi
math.radians(60)
math.sin(1.04719)
math.log(100)
math.log10(100)
math.sqrt(x)
round(math.sqrt(x),3)

Enter any number =45

6.708

- Q Write a Python function to sum all the numbers in a list.

def sum(numbers):
    total = 0
    for x in numbers:    
        total += x
    return total
#print(sum((12,34,55)))
sum((12,12))

- Q Write a Python funtion to check whether a given number is the given range?

def test_range(n):
    if n in range(12,50):
        print( " %s is in the range"%str(n))
    else :
        print("The number is outside the given range.")
test_range(13)

- Q Write a Python function that accepts a string and calculate the number of upper case letters and lower case letters

 d={"UPPER_CASE":0, "LOWER_CASE":0}
 d["UPPER_CASE"]+=2
d

def string_test(s):
    d={"UPPER_CASE":0, "LOWER_CASE":0,"SPACES_":0}
    for c in s:
        if c.isupper():
           d["UPPER_CASE"]+=1
        elif c.islower():
           d["LOWER_CASE"]+=1
        else:
           pass
    print ("Original String : ", s)
    print ("No. of Upper case characters : ", d["UPPER_CASE"])
    print ("No. of Lower case Characters : ", d["LOWER_CASE"])

string_test("PRACTICE")

Lamba Function

ambda function

• The lambda keyword is used to create anonymous functions - This function can have any number of arguments but only one expression, which is evaluated and returned. - One is free to use lambda functions wherever function objects are required. - You need to keep in your knowledge that lambda functions are syntactically restricted to a single expression.

x=lambda a : a*3
print(x(5)) 

a=[1,3,4,6,23,44,56,78,90,54,60]
list_odd = list(filter(lambda x:(x %6==0),a))
print(list_odd)

##Lambda functions can take any number of arguments
x = lambda a, b : a * b
print(x(5, 6)) 

Write a Python program to sort a list of tuples using Lambda

subject_marks = [('English', 88), ('Science', 90), ('Maths', 97), ('Social sciences', 82)]
print("Original list of tuples:")
print(subject_marks)
subject_marks.sort(key = lambda x: x[1])
print("\nSorting the List of Tuples:")
print(subject_marks)

The power of lambda is better shown when you use them as an anonymous function inside another function.

def my(r):
    print(4*r)
my(3)

12

def myfunc(n):
  print("The number:",n)
  return lambda a : n**a
  
r = myfunc(6)

print(r(4))

The number: 6
1296

def mydata(n):

return lambda a,b:(a+b)*n var = mydata(4) print(var(2,3))

Classes in Python &OO programming

class  Program1:
    "HI"   
print(Program1)#Tell about status of class.
print(60*"*")

class Program2:
    name="RAM"
    age = 29
print("NAME is %s and age is %d"%(Program2.name,Program2.age))
print(60*"*")

#Class &Objects
class Phone:
        Color=" "
        Price =00
        Type=" "
ob1=Phone()#Creation of objects and assinging it to class phone.
ob2=Phone()
ob1.Color="RED"
ob1.Price=10000
ob1.Type="Smart"
ob2.Color="Black"
ob2.Price=12000
ob2.Type="Smart"
print("This is a %s phone of %s color and its price is %drs"%(ob1.Type,ob1.Color,ob1.Price))
print("This is a %s phone of %s color and its price is %drs"%(ob2.Type,ob2.Color,ob2.Price))
print(50*"*")

### Class and Function

class X:
	"Classses and functions"
	myroll= 9
	def  student(self):
		print('This is Science Class')
ob = X()
print(X.student)
print(ob.student)
ob.student()
print(8*"*")
class Shop:
        "Things in MYshop"
        Quantity = 10
        Type       =   ""
        price=500.00
        def bill(self):
            print("your bill for  % s dress of %d quantity is %drs:"%(self.Type,self.Quantity,self.price))
coustmer1=Shop()
coustmer1.Quantity=5
coustmer1.Type="saree"
coustmer1.price=20000
coustmer1.bill()
print(50*"*")

# dictionary from an class's fields.
class dObj():
     def __init__(self):
         self.x = 'age'
         self.y = 'name'
         self.z = 'Gender'
     def do(self):
         pass
d = dObj()
print(d.__dict__)