风速转换器

import math

# Wind speed conversion functions (base unit: m/s)
def to_ms(value, unit):
    conversions = {"ms": 1, "kmh": 1/3.6, "mph": 1/2.23694, "knots": 1/1.94384}
    if unit == "beaufort":
        b = max(0, min(12, round(value)))
        return 0.836 * (b ** 1.5)
    return value * conversions[unit]

def from_ms(ms, unit):
    if unit == "beaufort":
        return (ms / 0.836) ** (2/3) if ms > 0 else 0
    conversions = {"ms": 1, "kmh": 3.6, "mph": 2.23694, "knots": 1.94384}
    return ms * conversions[unit]

# Convert 10 m/s to all units
ms = 10
print(f"10 m/s =")
print(f"  {from_ms(ms, 'kmh'):.1f} km/h")
print(f"  {from_ms(ms, 'mph'):.1f} mph")
print(f"  {from_ms(ms, 'knots'):.1f} knots")
print(f"  {from_ms(ms, 'beaufort'):.1f} Beaufort")