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Python: List of integers with exactly two occurrences of nineteen and at least three occurrences of five

Python Programming Puzzles: Exercise-1 with Solution

Write a Python program find a list of integers with exactly two occurrences of nineteen and at least three occurrences of five.

Input:
[19, 19, 15, 5, 3, 5, 5, 2]
Output:
True

Input:
[19, 15, 15, 5, 3, 3, 5, 2]
Output:
False

Input:
[19, 19, 5, 5, 5, 5, 5]
Output:
True

Pictorial Presentation:

Python: List of integers with exactly two occurrences of nineteen and at least three occurrences of five.
Python: List of integers with exactly two occurrences of nineteen and at least three occurrences of five.
Python: List of integers with exactly two occurrences of nineteen and at least three occurrences of five.

Sample Solution:

Python Code:

#License: https://bit.ly/3oLErEI

def test(nums):
    return nums.count(19) == 2 and nums.count(5) >= 3
nums = [19,19,15,5,3,5,5,2]
print("Original list:")
print(nums)
print("Check two occurrences of nineteen and at least three occurrences of five in the said list:")
print(test(nums))
nums = [19,15,15,5,3,3,5,2]
print("\nOriginal list:")
print(nums)
print("Check two occurrences of nineteen and at least three occurrences of five in the said list:")
print(test(nums))
nums = [19,19,5,5,5,5,5]
print("\nOriginal list:")
print(nums)
print("Check two occurrences of nineteen and at least three occurrences of five in the said list:")
print(test(nums))

Sample Output:

Original list:
[19, 19, 15, 5, 3, 5, 5, 2]
Check two occurrences of nineteen and at least three occurrences of five in the said list:
True

Original list:
[19, 15, 15, 5, 3, 3, 5, 2]
Check two occurrences of nineteen and at least three occurrences of five in the said list:
False

Original list:
[19, 19, 5, 5, 5, 5, 5]
Check two occurrences of nineteen and at least three occurrences of five in the said list:
True

Flowchart:

Flowchart: Python - List of integers with exactly two occurrences of nineteen and at least three occurrences of five.

Visualize Python code execution:

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Python Code Editor :

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Next: Check the length and the fifth element occurs twice in a list.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m