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How to use the map function in Python
Educative Answers TeamPython map takes a function and an iterable, and returns a map object and an iterator, which applies the function to all the elements in the iterable.
Note: You can pass more than one iterable to the
map()function.
We can also convert a map object to sequence objects such as list, tuple, etc.
Syntax
The syntax is as follows:
Example
Now let’s take a look at an example of an implementation of the map() function.
#function to double the value passed to it
def doubler(x):
return x * 2
#creating a list
my_list = [1, 3, 5, 2, 4]
#map function takes the function doubler and the iterable my_list
#map will pass each element of my_list to doubler function
result = map(doubler, my_list)
#prints a list containing the doubled values
print(result) The illustration below explains the example above:
1 of 6
Let’s convert the map object above to set type.
#converting map object to set
#result here is the final answer we got in the above code
result = [2, 6, 10, 4, 8]
print ("Converting to set")
answer1 = set(result)
print(answer1)When you run the code above, the output will be displayed as a set instead of a list.
RELATED TAGS
python
map
functions
iterators
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