vinaykudari

#lis is an iterable
lis = [1,2,3]
#lis_iter is an iterator
lis_iter = iter(lis)

for i in range(len(lis)):
    print(next(iterator))
    
    

vinaykudari

#lis is an iterable
lis = [1,2,3]

#lis_iter is an iterator
lis_iter = iter(lis)

#next() will return consecutive values untill the end
for i in range(len(lis)):
    print(next(iterator))

vinaykudari

def getrange(n):
  ```generator function```
    i = 0
    while i < n:
        yield i
        i += 1
        
n = 3
# calling generator function
a = getrange(n) # a is an iterator

vinaykudari

# lambda function
get_double = lambda x: x * 2

print(get_double(5))

# Output
>> 10

vinaykudari

list_a = [1, 2]
list_b = [10, 20]

def add(a,b):
  return a+b

m1 = map(add,list_a,list_b) #using normal function
m2 = map(lambda x, y: x + y, list_a, list_b) #using lambda function

>> print(list(m1)) 

vinaykudari

list_a = list(range(5))

def is_greater(n):
  if(n>2):
    return True
  else:
    return False
  
f1 = filter(lambda x : x>2, list_a) #lambda function
f2 = filter(is_greater, list_a) #normal function

vinaykudari

import functools #reduce() is in functools package
 
lis = [1, 3, 5, 6, 2]

def get_greater(a,b):
    if(a>b):
        return a
    else:
        return b

vinaykudari

#example_1
numbers = [1, 2, 3, 4]
squares = [n**2 for n in numbers]

>> squares
[1, 4, 9, 16]

#example_2
obj = ["Even" if i%2==0 else "Odd" for i in range(5)]

vinaykudari

lis = (i**2 for i in range(5))

>> type(list)
<class 'generator'>

>> list(lis)
[0, 1, 4, 9, 16]

vinaykudari

list_a = [1, 2, 3, 4, 5]
list_b = ['a', 'b', 'c', 'd', 'e']

zipped_object = zip(list_a, list_b)

>> type(zipped_object)
<class 'zip'>

>> list(zipped_object)
[(1, 'a'), (2, 'b'), (3, 'c'), (4, 'd'), (5, 'e')]