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How to extract particular data type rows
Bhanu
Problem: Given a matrix, extract all the rows that all have elements with a particular data type.
Method 1 : Using isinstance() + all() + list comprehension
In this method, we use isinstance() and all() to check for all the elements of a particular data type.
test_list = [[4, 5, "Hello"], [2, 6, 7], ["g", "f", "g"], [9, 10, 11]]
print("The original list is : " + str(test_list))
data_type = int
res = [row for row in test_list if all(
isinstance(ele, data_type) for ele in row)]
print("Filtered Rows : " + str(res)) Method 2 : Using filter() + lambda + isinstance()
In this method, we will perform the task of filtering using filter() and lambda isinstance().
test_list = [[4, 5, "Hello"], [2, 6, 7], ["g", "f", "g"], [9, 10, 11]]
print("The original list is : " + str(test_list))
data_type = int
res = list(filter(lambda row: all(isinstance(ele, data_type)
for ele in row), test_list))
print("Filtered Rows : " + str(res))RELATED TAGS
extract
python3
data types
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Bhanu
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