python-typing Archives

Programming, Python

IT Nursery

Difference between defining typing.Dict and dict?

I am practicing using type hints in Python 3.5. One of my colleague uses typing.Dict: import typing def change_bandwidths(new_bandwidths: typing.Dict, user_id: int, user_name: ...

June 3, 2022
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Programming, Python

IT Nursery

Python void return type annotation

In python 3.x, it is common to use return type annotation of a function, such as: def foo() -> str: return "bar" What ...

May 30, 2022
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Type hinting a collection of a specified type

Using Python 3’s function annotations, it is possible to specify the type of items contained within a homogeneous list (or other collection) for ...

May 25, 2022
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Python type hinting without cyclic imports

I’m trying to split my huge class into two; well, basically into the “main” class and a mixin with additional functions, like so: ...

May 24, 2022
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How to annotate types of multiple return values?

How do I use type hints to annotate a function that returns an Iterable that always yields two values: a bool and a ...

May 22, 2022
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How to specify “nullable” return type with type hints

Suppose I have a function: def get_some_date(some_argument: int=None) -> %datetime_or_None%: if some_argument is not None and some_argument == 1: return datetime.utcnow() else: return ...

May 16, 2022
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What are type hints in Python 3.5?

One of the most talked-about features in Python 3.5 is type hints. An example of type hints is mentioned in this article and ...

May 14, 2022
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Type annotations for *args and **kwargs

I’m trying out Python’s type annotations with abstract base classes to write some interfaces. Is there a way to annotate the possible types ...

May 13, 2022
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How can I specify the function type in my type hints?

How can I specify the type hint of a variable as a function type? (See also: PEP 483.) import typing def my_function(func: typing.Function): ...

May 13, 2022
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How to specify multiple return types using type-hints

I have a function in python that can either return a bool or a list. Is there a way to specify the return ...

May 5, 2022
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