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Python Challenges: Find missing numbers from a list

Python Challenges - 1: Exercise-8 with Solution

Write a Python program to find missing numbers from a list.

Explanation:

Python: Find a missing numbers from a list

Sample Solution:-

Python Code:

def missing_numbers(num_list):
      original_list = [x for x in range(num_list[0], num_list[-1] + 1)]
      num_list = set(num_list)
      return (list(num_list ^ set(original_list)))

print(missing_numbers([1,2,3,4,6,7,10]))
print(missing_numbers([10,11,12,14,17]))

Sample Output:

[5, 8, 9]                                                                                                     
[13, 15, 16] 

Flowchart:

Python Flowchart: Find a missing numbers from a list

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Previous: Write a Python program to find a missing number from a list.
Next: Write a Python program to find three numbers from an array such that the sum of three numbers equal to zero.

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Python: Tips of the Day

Python: Inserting if statements using conditional list comprehensions

x = [1, 2, 3, 4, 5, 6]
result = []
for idx in range(len(x)):
    if x[idx] % 2 == 0:
        result.append(x[idx] * 2)
    else:
        result.append(x[idx])
result

Output:

[1, 4, 3, 8, 5, 12]
[(element * 2 if element % 2 == 0 else element) for element in x]

Output:

[1, 4, 3, 8, 5, 12]
[element * 2 for element in x if element % 2 == 0]

Output:

[4, 8, 12]