Electric power

electronics/electric_power.py

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+# https://en.m.wikipedia.org/wiki/Electric_power
+
+
+def electric_power(voltage: float, current: float, power: float) -> float:
+    """
+    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)
+    {'voltage': 2.5}
+    >>> electric_power(voltage=2, current=2, power=0)
+    {'power': 4.0}
+    >>> electric_power(voltage=-2, current=3, power=0)
+    {'power': 6.0}
+    """
+    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 {"voltage": power / current}
+    elif current == 0:
+        return {"current": power / voltage}
+    elif power == 0:
+        return {"power": float(abs(voltage * current))}
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()