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basic_maths input check (#4486)

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* Prime factor input check

* number_of_divisors input check

* sum_of_divisors input check
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Grigoriy Hanin 2021-06-16 09:34:32 +03:00 committed by GitHub
parent 7d19d54f6f
commit 4f9ee4330a
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1 changed files with 33 additions and 4 deletions
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37
maths/basic_maths.py
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@ -6,7 +6,17 @@ def prime_factors(n: int) -> list:
"""Find Prime Factors. """Find Prime Factors.
>>> prime_factors(100) >>> prime_factors(100)
[2, 2, 5, 5] [2, 2, 5, 5]
>>> prime_factors(0)
Traceback (most recent call last):
...
ValueError: Only positive integers have prime factors
>>> prime_factors(-10)
Traceback (most recent call last):
...
ValueError: Only positive integers have prime factors
""" """
if n <= 0:
raise ValueError("Only positive integers have prime factors")
pf = [] pf = []
while n % 2 == 0: while n % 2 == 0:
pf.append(2) pf.append(2)
@ -24,7 +34,17 @@ def number_of_divisors(n: int) -> int:
"""Calculate Number of Divisors of an Integer. """Calculate Number of Divisors of an Integer.
>>> number_of_divisors(100) >>> number_of_divisors(100)
9 9
>>> number_of_divisors(0)
Traceback (most recent call last):
...
ValueError: Only positive numbers are accepted
>>> number_of_divisors(-10)
Traceback (most recent call last):
...
ValueError: Only positive numbers are accepted
""" """
if n <= 0:
raise ValueError("Only positive numbers are accepted")
div = 1 div = 1
temp = 1 temp = 1
while n % 2 == 0: while n % 2 == 0:
@ -44,7 +64,17 @@ def sum_of_divisors(n: int) -> int:
"""Calculate Sum of Divisors. """Calculate Sum of Divisors.
>>> sum_of_divisors(100) >>> sum_of_divisors(100)
217 217
>>> sum_of_divisors(0)
Traceback (most recent call last):
...
ValueError: Only positive numbers are accepted
>>> sum_of_divisors(-10)
Traceback (most recent call last):
...
ValueError: Only positive numbers are accepted
""" """
if n <= 0:
raise ValueError("Only positive numbers are accepted")
s = 1 s = 1
temp = 1 temp = 1
while n % 2 == 0: while n % 2 == 0:
@ -74,7 +104,6 @@ def euler_phi(n: int) -> int:
if __name__ == "__main__": if __name__ == "__main__":
print(prime_factors(100)) import doctest
print(number_of_divisors(100))
print(sum_of_divisors(100)) doctest.testmod()
print(euler_phi(100))