Python: Extract a specified column from a given nested list
Python List: Exercise - 108 with Solution
Write a Python program to extract a specified column from a given nested list.
Sample Solution:
Python Code:
def remove_column(nums, n):
result = [i.pop(n) for i in nums]
return result
list1 = [[1, 2, 3], [2, 4, 5], [1, 1, 1]]
n = 0
print("Original Nested list:")
print(list1)
print("Extract 1st column:")
print(remove_column(list1, n))
list2 = [[1, 2, 3], [-2, 4, -5], [1, -1, 1]]
n = 2
print("\nOriginal Nested list:")
print(list2)
print("Extract 3rd column:")
print(remove_column(list2, n))
Sample Output:
Original Nested list: [[1, 2, 3], [2, 4, 5], [1, 1, 1]] Extract 1st column: [1, 2, 1] Original Nested list: [[1, 2, 3], [-2, 4, -5], [1, -1, 1]] Extract 3rd column: [3, -5, 1]
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Python: Tips of the Day
Given a predicate function, fn, and a prop string, this curried function will then take an object to inspect by calling the property and passing it to the predicate:
Example:
def tips_check_prop(fn, prop): return lambda obj: fn(obj[prop]) check_age = tips_check_prop(lambda x: x >= 25, 'age') user = {'name': 'Owen', 'age': 25} print(check_age(user))
Output:
True
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