water_cli 0.1.9

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Water

Like fire

This python library parses classes so that they can be executed as commands.
In contrast with fire, there is no "automatic" type casting -- the type casting is 100% based on type hints.

Type casting

When calling execute_command the values passed in the command get casted to the annotated types on the function signature.

Supported types:

• int, float
• bool: the strings ['true', '1', 't', 'y'] are considered true.
• lists, tuples: input is split by comma (,) and each element is casted independently.
• enum
• Union[]: gets casted to all options in order, first success is returned.
  • Optional[type] is Union[type, NoneType]

Examples

Type casting

class Math1:
    def add_list(self, items: Optional[List[int]] = None):
        if not items:
            return 0
        return sum(items)

# `items` casted to a list of `int`
res = execute_command(Math1, 'add_list --items 1,2,3')
assert res == 6

# `items` casted to a list of `int`, even though there is only one entry
res = execute_command(Math1, 'add_list --items 1')
assert res == 1

Nested commands

class NestedObj:
    class Inside1:
        def fn1(self, number: int):
            return number

res = execute_command(NestedObj, 'Inside1 fn1 --number 1')
assert res == 1