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Python: Extract specified number of elements from a given list, which follows each other continuously

Python List: Exercise - 103 with Solution

Write a Python program to extract specified number of elements from a given list, which follows each other continuously.

Sample Solution:

Python Code:

from itertools import groupby 

def extract_elements(nums, n):
    result = [i for i, j in groupby(nums) if len(list(j)) == n] 
    return result

nums1 = [1, 1, 3, 4, 4, 5, 6, 7]
n = 2
print("Original list:")
print(nums1)
print("Extract 2 number of elements from the said list which follows each other continuously:") 
print(extract_elements(nums1, n))
nums2 = [0, 1, 2, 3, 4, 4, 4, 4, 5, 7]
n = 4
print("Original lists:")
print(nums2)
print("Extract 4 number of elements from the said list which follows each other continuously:") 
print(extract_elements(nums2, n))

Sample Output:

Original list:
[1, 1, 3, 4, 4, 5, 6, 7]
Extract 2 number of elements from the said list which follows each other continuously:
[1, 4]
Original lists:
[0, 1, 2, 3, 4, 4, 4, 4, 5, 7]
Extract 4 number of elements from the said list which follows each other continuously:
[4]

Pictorial Presentation:

Python List: Extract specified number of elements from a given list, which follows each other continuously.
Python List: Extract specified number of elements from a given list, which follows each other continuously.

Flowchart:

Flowchart: Extract specified number of elements from a given list, which follows each other continuously.

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Python Code Editor:

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Previous: Write a Python program to extract specified size of strings from a give list of string values.
Next: Write a Python program to find the difference between consecutive numbers in a given list.

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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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