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50 lines
1.2 KiB
Python
50 lines
1.2 KiB
Python
import math
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def real_power(apparent_power: float, power_factor: float) -> float:
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"""
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Calculate real power from apparent power and power factor.
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Examples:
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>>> real_power(100, 0.9)
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90.0
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>>> real_power(0, 0.8)
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0.0
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>>> real_power(100, -0.9)
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-90.0
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"""
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if (
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not isinstance(power_factor, (int, float))
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or power_factor < -1
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or power_factor > 1
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):
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raise ValueError("power_factor must be a valid float value between -1 and 1.")
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return apparent_power * power_factor
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def reactive_power(apparent_power: float, power_factor: float) -> float:
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"""
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Calculate reactive power from apparent power and power factor.
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Examples:
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>>> reactive_power(100, 0.9)
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43.58898943540673
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>>> reactive_power(0, 0.8)
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0.0
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>>> reactive_power(100, -0.9)
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43.58898943540673
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"""
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if (
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not isinstance(power_factor, (int, float))
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or power_factor < -1
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or power_factor > 1
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):
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raise ValueError("power_factor must be a valid float value between -1 and 1.")
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return apparent_power * math.sqrt(1 - power_factor**2)
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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