Python: Count number of unique lists within list
Python List: Exercise - 94 with Solution
Write a Python program to count the number of unique sublists within a given list.
Sample Solution:
Python Code:
def unique_sublists(input_list):
result ={}
for l in input_list:
result.setdefault(tuple(l), list()).append(1)
for a, b in result.items():
result[a] = sum(b)
return result
list1 = [[1, 3], [5, 7], [1, 3], [13, 15, 17], [5, 7], [9, 11]]
print("Original list:")
print(list1)
print("Number of unique lists of the said list:")
print(unique_sublists(list1))
color1 = [["green", "orange"], ["black"], ["green", "orange"], ["white"]]
print("\nOriginal list:")
print(color1)
print("Number of unique lists of the said list:")
print(unique_sublists(color1))
Sample Output:
Original list: [[1, 3], [5, 7], [1, 3], [13, 15, 17], [5, 7], [9, 11]] Number of unique lists of the said list: {(1, 3): 2, (5, 7): 2, (13, 15, 17): 1, (9, 11): 1} Original list: [['green', 'orange'], ['black'], ['green', 'orange'], ['white']] Number of unique lists of the said list: {('green', 'orange'): 2, ('black',): 1, ('white',): 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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