Skip to content
Related Articles

# Python – Check Similar elements in Matrix rows

• Last Updated : 08 Dec, 2020

Given a Matrix and list, the task is to write a Python program to check if all the matrix elements of the row are similar to the ith index of List.

Input : test_list = [[1, 1, 1], [4, 4], [3, 3, 3], [5, 5, 5, 5]]
Output : True
Explanation : All rows have same elements.

Input : test_list = [[1, 1, 4], [4, 4], [3, 3, 3], [5, 5, 5, 5]]
Output : False
Explanation : All rows don’t have same elements.

Method #1 : Using loop

In this, we iterate through each row and check for its similar number in the list, if all the elements in a row are the same as an ith element in the List, true is returned, else false.

## Python3

 `# Python3 code to demonstrate working of``# Similar all elements as List in Matrix rows``# Using loop`` ` `# initializing Matrix``test_list ``=` `[[``1``, ``1``, ``1``], [``4``, ``4``],``             ``[``3``, ``3``, ``3``], [``5``, ``5``, ``5``, ``5``]]``              ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# initializing tar_list ``tar_list ``=` `[``1``, ``4``, ``3``, ``5``]`` ` `res ``=` `True``flag ``=` `0``for` `idx ``in` `range``(``len``(test_list)):``    ``for` `ele ``in` `test_list[idx]:``         ` `        ``# checking for row index ``        ``# equal to list index elements ``        ``if` `ele !``=` `tar_list[idx]:``            ``res ``=` `False` `            ``flag ``=` `1``            ``break``             ` `    ``if` `flag:``        ``break``     ` `# printing result``print``("Are row index element similar\``       ``to ``list` `index element ? : " ``+` `str``(res))`

Output:

The original list is : [[1, 1, 1], [4, 4], [3, 3, 3], [5, 5, 5, 5]]
Are row index element similar to list index element ? : True

Method #2 : Using all() + generator expression

In this, we check for all elements to be equal using all(), and check for all elements follow this pattern using all() again. The iteration of elements and rows is done using generator expression.

## Python3

 `# Python3 code to demonstrate working of``# Similar all elements as List in Matrix rows``# Using all() + generator expression`` ` `# initializing Matrix``test_list ``=` `[[``1``, ``1``, ``1``], [``4``, ``4``],``             ``[``3``, ``3``, ``3``], [``5``, ``5``, ``5``, ``5``]]``              ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# initializing tar_list ``tar_list ``=` `[``1``, ``4``, ``3``, ``5``]`` ` `# nested all() used to check each element and rows``res ``=` `all``(``all``(ele ``=``=` `tar_list[idx] ``for` `ele ``in` `test_list[idx])``          ``for` `idx ``in` `range``(``len``(test_list)) )``     ` `# printing result``print``("Are row index element\``    ``similar to ``list` `index element ? : " ``+` `str``(res))`

Output:

The original list is : [[1, 1, 1], [4, 4], [3, 3, 3], [5, 5, 5, 5]]
Are row index element similar to list index element ? : True

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes arrow_drop_up