Utility framework for easier & more robust duck typing in Python
Python Shell
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.
pyduck
tests
.gitignore
MANIFEST.in
README.markdown
convert_github_md.py
pypi_upload
run_tests
setup.py
test_coverage

README.markdown

Easier & more robust duck typing

pyduck is a Python utility framework for more effective usage of language's defining traits: duck typing. It enhances the language with several useful features that increase the readability and reliability of Python code.

from pyduck import Interface, expects, Any, overload

class Iterable(Interface):
    def __iter__(self): pass

@expects(Iterable)
def __iterable_as_json(value):
    json_list = map(as_json, value)
    return "[%s]" % str.join(",", json_list)

@expects(basestring)
def __string_as_json(value):
    return '"%s"' % str(value)

@expects(Any)
def __other_as_json(value):
    return str(value)

as_json = overload(__iterable_as_json, __string_as_json, __other_as_json)

Features

  • interfaces which do not need to be explicitly declared (similar to Go language)
  • automatic interface/type checking for function arguments
  • function overloading based on interfaces/types of arguments
  • automatic interface/type checking for function return values

For more info & the docs, see the project's webpage.