Python: Count number of lists in a given list of lists
Python List: Exercise - 90 with Solution
Write a Python program to count the number of lists in a given list of lists.
Sample Solution:
Python Code:
def count_list(input_list):
return len(input_list)
list1 = [[1, 3], [5, 7], [9, 11], [13, 15, 17]]
list2 = [[2, 4], [[6,8], [4,5,8]], [10, 12, 14]]
print("Original list:")
print(list1)
print("\nNumber of lists in said list of lists:")
print(count_list(list1))
print("\nOriginal list:")
print(list2)
print("\nNumber of lists in said list of lists:")
print(count_list(list2))
Sample Output:
Original list: [[1, 3], [5, 7], [9, 11], [13, 15, 17]] Number of lists in said list of lists: 4 Original list: [[2, 4], [[6, 8], [4, 5, 8]], [10, 12, 14]] Number of lists in said list of lists: 3
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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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