mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-11-30 16:31:08 +00:00
cecf43d648
* Pyupgrade to Python 3.9
* updating DIRECTORY.md
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
54 lines
1.9 KiB
Python
54 lines
1.9 KiB
Python
# https://en.m.wikipedia.org/wiki/Electric_power
|
|
from __future__ import annotations
|
|
|
|
from collections import namedtuple
|
|
|
|
|
|
def electric_power(voltage: float, current: float, power: float) -> tuple:
|
|
"""
|
|
This function can calculate any one of the three (voltage, current, power),
|
|
fundamental value of electrical system.
|
|
examples are below:
|
|
>>> electric_power(voltage=0, current=2, power=5)
|
|
result(name='voltage', value=2.5)
|
|
>>> electric_power(voltage=2, current=2, power=0)
|
|
result(name='power', value=4.0)
|
|
>>> electric_power(voltage=-2, current=3, power=0)
|
|
result(name='power', value=6.0)
|
|
>>> electric_power(voltage=2, current=4, power=2)
|
|
Traceback (most recent call last):
|
|
File "<stdin>", line 15, in <module>
|
|
ValueError: Only one argument must be 0
|
|
>>> electric_power(voltage=0, current=0, power=2)
|
|
Traceback (most recent call last):
|
|
File "<stdin>", line 19, in <module>
|
|
ValueError: Only one argument must be 0
|
|
>>> electric_power(voltage=0, current=2, power=-4)
|
|
Traceback (most recent call last):
|
|
File "<stdin>", line 23, in <modulei
|
|
ValueError: Power cannot be negative in any electrical/electronics system
|
|
>>> electric_power(voltage=2.2, current=2.2, power=0)
|
|
result(name='power', value=4.84)
|
|
"""
|
|
result = namedtuple("result", "name value")
|
|
if (voltage, current, power).count(0) != 1:
|
|
raise ValueError("Only one argument must be 0")
|
|
elif power < 0:
|
|
raise ValueError(
|
|
"Power cannot be negative in any electrical/electronics system"
|
|
)
|
|
elif voltage == 0:
|
|
return result("voltage", power / current)
|
|
elif current == 0:
|
|
return result("current", power / voltage)
|
|
elif power == 0:
|
|
return result("power", float(round(abs(voltage * current), 2)))
|
|
else:
|
|
raise ValueError("Exactly one argument must be 0")
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import doctest
|
|
|
|
doctest.testmod()
|