BUG: styler.format options and validator tests

[attack68]

sorry, this is a fix for recent #43256.
the input types were not working using the instance factory approach so this is explicit.

[jreback]

cool, once more rebase pls.

[alimcmaster1]

grr frequent network issues calling the conda repos hopefully #42580 helps with this.

Collecting package metadata (repodata.json): ...working... failed

CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://repo.anaconda.com/pkgs/main/win-64/repodata.json>
Elapsed: -

An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.

If your current network has https://www.anaconda.com blocked, please file
a support request with your network engineering team.

'https://repo.anaconda.com/pkgs/main/win-64'

[alimcmaster1]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[alimcmaster1]

LGTM

[jreback]

umm why doesn't this work?

[attack68]

x = '{:.2f}'

    def inner(x) -> None:
>       if not isinstance(x, _type):
E       TypeError: isinstance() arg 2 must be a type or tuple of types

x = <function <lambda> at 0x1251dd160>

    def inner(x) -> None:
>       if not isinstance(x, _type):
E       TypeError: isinstance() arg 2 must be a type or tuple of types

Also the signature of of the is_instance_factory struggles with callable:

>>> isinstance(lambda x: x, callable)
False
>>> isinstance(lambda x: x, type(callable))
False
>>> callable(lambda x: x)
True

[attack68]

Ok fixed: callable != Callable !!!