w3resource

Python: Count the same pair in two given lists using map function

Python map: Exercise-13 with Solution

Write a Python program to count the same pair in two given lists. Use map() function.

Sample Solution:

Python Code:

from operator import eq
def count_same_pair(nums1, nums2):
    result = sum(map(eq, nums1, nums2))
    return result

nums1 = [1,2,3,4,5,6,7,8]
nums2 = [2,2,3,1,2,6,7,9]
print("Original lists:")
print(nums1)
print(nums2)
print("\nNumber of same pair of the said two given lists:")
print(count_same_pair(nums1, nums2))

Sample Output:

Original lists:
[1, 2, 3, 4, 5, 6, 7, 8]
[2, 2, 3, 1, 2, 6, 7, 9]

Number of same pair of the said two given lists:
4

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to find the ration of positive numbers, negative numbers and zeroes in an array of integers.

Next: Write a Python program to interleave two given list into another list randomly. use map() function.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.

Python: Tips of the Day

Kwargs:

**kwargs and *args are function arguments that can be very useful.

They are quite underused and often under-understood as well.

Let's try to explain what kwargs are and how to use them.

  • While *args are used to pass arguments at an unknown amount to functions, **kwargs are used to do the same but with named arguments.
  • So, if *args is a list being passed as an argument, you can think of **kwargs as a dictionary that's being passed as an argument to a function.
  • You can use arguments as you wish as long as you follow the correct order which is: arg1, arg2, *args, **kwargs. It's okay to use only one of those but you can't mix the order, for instance, you can't have: function(**kwargs, arg1), that'd be a major faux pas in Python.
  • Another example: You can do function(*args,**kwargs) since it follows the correct order.
  • Here is an example. Let's say satelites are given with their names and weight in tons in dictionary format. Code prints their weight as kilograms along with their names.
def payloads(**kwargs):
    for key, value in kwargs.items():
        print( key+" |||", float(value)*100)
payloads(NavSat1 = '2.5', BaysatG2 = '4')

Output:

NavSat1 ||| 250.0
BaysatG2 ||| 400.0

Since the function above would work for any number of dictionary keys, **kwargs makes perfect sense rather than passing arguments with a fixed amount.

def payloads(**kwargs):
    for key, value in kwargs.items():
        print( key+" |||", float(value)*100)

sats={"Tx211":"3", "V1":"0.50"}
payloads(**sats)

Output:

Tx211 ||| 300.0
V1 ||| 50.0