Parameter name clash in extra.django.from_model

[DanLipsitt]

from_model's first argument is model:

hypothesis/hypothesis-python/src/hypothesis/extra/django/_impl.py

Lines 57 to 59 in d159096

	def from_model(
	model: Type[dm.Model], **field_strategies: Union[st.SearchStrategy, InferType]
	) -> st.SearchStrategy:

This leads to an error when trying to write a strategy for a class that has a field named model. For example:

from django.db.models import Model, CharField
class Car(Model):
    model = CharField(help_text="The model of the car.")

car_strategy = from_model(Car, model='Mustang')

This will result in the following error:

TypeError: from_model() got multiple values for argument 'model'

Perhaps the first argument to from_model could be named _model or _hypothesis_model or something like that?

[Zac-HD]

Ah, we had the same problem with builds() (#1106), which was fixed by manual validation of *args - it's inelegant, but fixes the problem.

In Python 3.8 (or later), we can instead use a named positional-only argument... but that's years away. Until then we can patch the __signature__ to fix our docs, like #2345, and get better introspection on new Pythons for free.