Let’s take a simple function that takes a str and returns a dataframe: What is the recommended pythonic way of adding type hints to this function? If I ask python for the type of a DataFrame it returns pandas.core.frame.DataFrame. The following won’t work though, as it’ll tell me that pandas is not defined. Answer Why not just use pd.DataFrame? Result
Tag: type-hinting
The correct way to annotate a “file type” in Python [duplicate]
This question already has answers here: Type hint for a file or file-like object? (2 answers) Closed 8 months ago. In modern versions of Python one can have static type analysis using function annotations, according to PEP 484. This is made easy through the typing module. Now I’m wondering how I would give a “type hint” towards a “filestream”. What
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: main.py file: mymixin.py file: Now, while this works just fine, the type hint in MyMixin.func2 of course can’t work. I can’t import main.py, because I’d get a cyclic import and without the hint, my editor (PyCharm) can’t
Type hinting / annotation (PEP 484) for numpy.ndarray
Has anyone implemented type hinting for the specific numpy.ndarray class? Right now, I’m using typing.Any, but it would be nice to have something more specific. For instance if the NumPy people added a type alias for their array_like object class. Better yet, implement support at the dtype level, so that other objects would be supported, as well as ufunc. Answer
Correct way use type hints / generics to describe arguments of type class (“type”)
This appears to be similar to Type Hinting: Argument Of Type Class, however, the accepted answer there does not actually answer my question, so perhaps the question was expressed incorrectly (?) I have a serialization/deserialization framework that would benefit greatly from [IDE-supported] type hinting. The API looks something like this: The serialization method is fine, but deserialize type hinting is
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 this one while also mentioning to use type hints responsibly. Can someone explain more about them and when they should be used and when not? Answer I would suggest reading PEP 483 and PEP 484 and watching