Python: Find the largest k numbers
Python Programming Puzzles: Exercise-36 with Solution
Write a Python program to find the largest k numbers from a given list of numbers.
Input: [1, 2, 3, 4, 5, 5, 3, 6, 2] Output: [6] Input: [1, 2, 3, 4, 5, 5, 3, 6, 2] Output: [6, 5] Input: [1, 2, 3, 4, 5, 5, 3, 6, 2] Output: [6, 5, 5] Input: [1, 2, 3, 4, 5, 5, 3, 6, 2] Output: [6, 5, 5, 4] Input: [1, 2, 3, 4, 5, 5, 3, 6, 2] Output: [6, 5, 5, 4, 3]
Pictorial Presentation:


Sample Solution-1:
Python Code:
#License: https://bit.ly/3oLErEI
def test(nums, k):
if k == 0:
return []
return sorted(nums, reverse=True)[:k]
nums = [1, 2, 3, 4, 5, 5, 3, 6, 2]
print("Original list of numbers:",nums)
k = 1
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
k = 2
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
k = 3
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
k = 4
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
k = 5
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
Sample Output:
Original list of numbers: [1, 2, 3, 4, 5, 5, 3, 6, 2] Largest 1 numbers from the said list: [6] Largest 2 numbers from the said list: [6, 5] Largest 3 numbers from the said list: [6, 5, 5] Largest 4 numbers from the said list: [6, 5, 5, 4] Largest 5 numbers from the said list: [6, 5, 5, 4, 3]
Flowchart:

Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Sample Solution-2:
Python Code:
#License: https://bit.ly/3oLErEI
def test(nums, k):
if k == 0:
return []
elif k == len(nums):
return nums
else:
x = nums[0]
for n in nums:
if x < n:
x = n
result = [x]
largest = nums[:]
largest.remove(x)
while len(result) != k:
smallest = largest[0]
for n in largest:
if smallest < n:
smallest = n
result.append(smallest)
largest.remove(smallest)
return result
nums = [1, 2, 3, 4, 5, 5, 3, 6, 2]
print("Original list of numbers:",nums)
k = 1
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
k = 2
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
k = 3
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
k = 4
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
k = 5
print("Largest", k, "numbers from the said list:")
print(test(nums, k))
Sample Output:
Original list of numbers: [1, 2, 3, 4, 5, 5, 3, 6, 2] Largest 1 numbers from the said list: [6] Largest 2 numbers from the said list: [6, 5] Largest 3 numbers from the said list: [6, 5, 5] Largest 4 numbers from the said list: [6, 5, 5, 4] Largest 5 numbers from the said list: [6, 5, 5, 4, 3]
Flowchart:

Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Python Code Editor :
Have another way to solve this solution? Contribute your code (and comments) through Disqus.
Previous: Product of the odd digits in n, or 0 if there aren't any.
Next: Find the largest integer divisor of a number n that is less than n.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
Python: Tips of the Day
Clamps num within the inclusive range specified by the boundary values x and y:
Example:
def tips_clamp_num(num,x,y): return max(min(num, max(x, y)), min(x, y)) print(tips_clamp_num(2, 4, 6)) print(tips_clamp_num(1, -1, -6))
Output:
4 -1
- New Content published on w3resource:
- HTML-CSS Practical: Exercises, Practice, Solution
- Java Regular Expression: Exercises, Practice, Solution
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework