The Python map() Function returns a map object(which is an iterator) of the results after applying the given function to each item of a given iterable (list, tuple etc.)
The Python map() Function is used to return a list of results after applying a given function to each item of an iterable(list, tuple etc.)
For every element present in the given sequence, apply some functionality and generate new element with the required modification. For this requirement we should go for map() function.
Eg: For every element present in the list perform double and generate new list of doubles.
Syntax: map(function, sequence)
function– It is a function in which a map passes each item of the iterable.
iterables– It is a sequence, collection or an iterator object which is to be mapped.
Return -It returns a list of results after applying a given function to each item of an iterable(list, tuple etc.)
| # List of strings
l = [‘sat’, ‘bat’, ‘cat’, ‘mat’]
# map() can listify the list of strings individually test = list(map(list, l)) print(test) OUTPUT: [[‘s’, ‘a’, ‘t’], [‘b’, ‘a’, ‘t’], [‘c’, ‘a’, ‘t’], [‘m’, ‘a’, ‘t’]] |
The function can be applied on each element of sequence and generates new sequence.
| Without Lambda
1) l=[1,2,3,4,5] 2) def doubleIt(x): 3) return 2*x 4) l1=list(map(doubleIt,l)) 5) print(l1) #[2, 4, 6, 8, 10]
With Lambda 1) l=[1,2,3,4,5] 2) l1=list(map(lambda x:2*x,l)) 3) print(l1) #[2, 4, 6, 8, 10] |
Related Posts:
Python Tutorial – Learn Python
What is Python? What makes Python so Powerful?
Variables in Python – Constant, Global & Static Variables
Namespacing and Scopes in Python
TUPLE Data Structure in PYTHON
Differences between List and Tuple
DICTIONARY Data Structure in PYTHON
Database Programming in Python
What is Multithreading in Python?
Python Exception Handling Using try, except and finally statement