Create speed_conversions.py

conversions/speed_conversions.py

@@ -0,0 +1,172 @@
+"""
+Convert speed units
+
+https://en.wikipedia.org/wiki/Kilometres_per_hour
+https://en.wikipedia.org/wiki/Miles_per_hour
+https://en.wikipedia.org/wiki/Knot_(unit)
+https://en.wikipedia.org/wiki/Metre_per_second
+
+"""
+
+
+def convert_speed(speed: float, unit_from: str, unit_to: str) -> float:
+    """
+    Return speed units based on input
+
+    >>> convert_speed(10, 'm/s', 'km/h')
+    36.0
+
+    >>> convert_speed(10, 'km/h', 'm/s')
+    2.78
+
+    >>> convert_speed(10, 'm/s', 'mph')
+    22.37
+
+    >>> convert_speed(10, 'mph', 'm/s')
+    4.47
+
+    >>> convert_speed(10, 'km/h', 'mph')
+    6.21
+
+    >>> convert_speed(10, 'mph', 'km/h')
+    16.09
+
+    >>> convert_speed(10, 'm/s', 'knots')
+    19.44
+
+    >>> convert_speed(10, 'knots', 'm/s')
+    5.14
+
+    >>> convert_speed(10, 'km/h', 'knots')
+    5.4
+
+    >>> convert_speed(10, 'knots', 'km/h')
+    18.52
+
+    >>> convert_speed(10, 'mph', 'knots')
+    8.69
+
+    >>> convert_speed(10, 'knots', 'mph')
+    11.51
+
+    >>> convert_speed(abc, 'm/s', 'km/h')
+    Traceback (most recent call last):
+        ...
+    NameError: name 'abc' is not defined
+
+    >>> convert_speed(10, 'abc', 'km/h')
+    Traceback (most recent call last):
+        ...
+    ValueError: invalid literal for int() with base 10: abc
+    """
+    if unit_from == "m/s":
+        if unit_to == "km/h":
+            return round(speed * 3.6, 2)
+        elif unit_to == "mph":
+            return round(speed * 2.23694, 2)
+        elif unit_to == "knots":
+            return round(speed * 1.94384, 2)
+        else:
+            raise ValueError("invalid literal for int() with base 10: " + unit_to)
+
+    elif unit_from == "km/h":
+        if unit_to == "m/s":
+            return round(speed / 3.6, 2)
+        elif unit_to == "mph":
+            return round(speed * 0.621371, 2)
+        elif unit_to == "knots":
+            return round(speed * 0.539957, 2)
+        else:
+            raise ValueError("invalid literal for int() with base 10: " + unit_to)
+
+    elif unit_from == "mph":
+        if unit_to == "m/s":
+            return round(speed / 2.23694, 2)
+        elif unit_to == "km/h":
+            return round(speed / 0.621371, 2)
+        elif unit_to == "knots":
+            return round(speed * 0.868976, 2)
+        else:
+            raise ValueError("invalid literal for int() with base 10: " + unit_to)
+
+    elif unit_from == "knots":
+        if unit_to == "m/s":
+            return round(speed / 1.94384, 2)
+        elif unit_to == "km/h":
+            return round(speed / 0.539957, 2)
+        elif unit_to == "mph":
+            return round(speed / 0.868976, 2)
+        else:
+            raise ValueError("invalid literal for int() with base 10: " + unit_to)
+    else:
+        raise ValueError("invalid literal for int() with base 10: " + unit_from)
+
+
+if __name__ == "__main__":
+    """
+    Run doctests
+
+    >>> round(convert_speed(10, 'm/s', 'km/h'), 2)
+    36.0
+
+    >>> round(convert_speed(10, 'km/h', 'm/s'), 2)
+    2.78
+
+    >>> round(convert_speed(10, 'm/s', 'mph'), 2)
+    22.37
+
+    >>> round(convert_speed(10, 'mph', 'm/s'), 2)
+    4.47
+
+    >>> round(convert_speed(10, 'km/h', 'mph'), 2)
+    6.21
+
+    >>> round(convert_speed(10, 'mph', 'km/h'), 2)
+    16.09
+
+    >>> round(convert_speed(10, 'm/s', 'knots'), 2)
+    19.44
+
+    >>> round(convert_speed(10, 'knots', 'm/s'), 2)
+    5.14
+
+    >>> round(convert_speed(10, 'km/h', 'knots'), 2)
+    5.4
+
+    >>> round(convert_speed(10, 'knots', 'km/h'), 2)
+    18.52
+
+    >>> round(convert_speed(10, 'mph', 'knots'), 2)
+    8.69
+
+    >>> round(convert_speed(10, 'knots', 'mph'), 2)
+    11.55
+
+    >>> round(convert_speed(10, 'abc', 'km/h'), 2)
+    Traceback (most recent call last):
+    ...
+    ValueError: invalid literal for int() with base 10: 'abc'
+
+    >>> round(convert_speed(abc, 'm/s', 'km/h'), 2)
+    Traceback (most recent call last):
+    ...
+    ValueError: could not convert string to float: 'abc'
+
+    """
+    import doctest
+
+    doctest.testmod()
+
+    print("----Codes for speed units----")
+    print("m/s: meters per second")
+    print("km/h: kilometers per hour")
+    print("mph: miles per hour")
+    print("knots: nautical miles per hour")
+
+    from_unit = input("From unit code: ")
+    to_unit = input("To unit code: ")
+    speed = input("Speed: ")
+
+    speed_converted = round(convert_speed(float(speed), from_unit, to_unit), 2)
+
+    print(f"{speed} {from_unit} is {speed_converted} {to_unit}")

conversions/volume_conversions.py

@@ -52,11 +52,7 @@ def volume_conversion(value: float, from_type: str, to_type: str) -> float:
     0.000236588
     >>> volume_conversion(4, "wrongUnit", "litre")
     Traceback (most recent call last):
-      File "/usr/lib/python3.8/doctest.py", line 1336, in __run
-        exec(compile(example.source, filename, "single",
-      File "<doctest __main__.volume_conversion[7]>", line 1, in <module>
-        volume_conversion(4, "wrongUnit", "litre")
-      File "<string>", line 62, in volume_conversion
+    ...
     ValueError: Invalid 'from_type' value: 'wrongUnit'  Supported values are:
     cubicmeter, litre, kilolitre, gallon, cubicyard, cubicfoot, cup
     """