Unit 3 - Lesson 6

29.1.1. Local variables - an overview

def test1():
    a=50
    b=80
    print(a,b)
#complete the function

def test2():
    a=22
    b=44
    print(a,b)
#complete the function

test1()
test2()

29.1.2. Global variable

globvar = input()

def test1():
    global globvar
    #declare the global variable as "globvar" and return it.
    return(globvar)
def test2():

    global globvar
    globvar = "Good Morning" 
    return(globvar)
    #return the globvar

print(test1())
print(test2())

29.1.3. Writing a local and Global variables example

#Program to illustrate Global and Local Variables
a = int(input("a: "))

def changeglobal():
    global a
    #declare varibale "a" as global
    a=200
    #Assign a value 200 to the varibale a
def changelocal():
    a=500
    #Assign a value 500 to the varibale a

    print("local a value:", a)

print("global a before function call:", a)
changeglobal()
changelocal()
print("global a after function call:", a)

29.2.1. Function composition - an overview

def square(x):
    # find square of a given number and return the result
    return x**2

def double(x):
    return x*2

    # double the given number and return the result

num = int(input("num: "))

print("double, squaring the value:", square(double(num)))

29.2.2. Writing a function composition example

def compose (*functions):  
    def inner(arg):
        for f in functions:
            arg=f(arg)
        return arg
    return inner

def square (x):
    return(x**2)

def increment (x):
    return x+1

def half (x):
    return x/2

x=int(input())
composed = compose(square, increment, half)
print(composed(x))

composed = compose(square, increment)
print(composed(x))

Unit 3 - Lesson 6 | Codetantra Python

Unit 3 - Lesson 6