I'm using Pycharm to develop python scripts.
I have a list of class and want to sort this list by a class property.
However, when I use:
results: list[HotelInfo] = get_result()
results.sort(key=lambda x: x.price)
PyCharm's type hint shows that "x" is of type "any" and can't get class property.
Even if I set x: CLASS_NAME, the lambda seems doesn't display correct type.
How can I solve this problem in PyCharm?
As Martijn Pieters♦ points out in his answer you can type hint a callable object and pass that as your function.
results: list[HotelInfo] = get_result()
get_price: Callable[[HotelInfo], int] = lambda hotel: hotel.price
results.sort(key=get_price)
This works for me in a local example and PyCharm recognizes the types.
strings = ["Hello World", "Goodbye World :(", "Cookies"]
func: Callable[[str], int] = lambda s: len(s)
print(sorted(strings, key=func))
... ] = lambda hotel: hotel.price , pycharm still show the hotel is any