Setting many types of values to `category` argument of `warnings.simplefilter()` doesn't get any error

Bug report

Bug description:

Setting Warning to category argument of warnings.filterwarnings() works, then setting the str type value "Hello World" to category argument of warnings.filterwarnings() gets the error message as shown below. *This is an understandable behavior:

import warnings

warnings.resetwarnings()

warnings.filterwarnings(action="ignore", category=Warning)

print(warnings.filters)
# [('ignore', None, <class 'Warning'>, None, 0)]

warnings.filterwarnings(action="ignore", category="Hello World") # Error

print(warnings.filters)

AssertionError: category must be a class

But, setting many types of values to category argument of warnings.simplefilter() doesn't get any error as shown below. *This isn't an understandable behavior:

import warnings

warnings.simplefilter(action="default", category=Warning)         # Understandable
warnings.simplefilter(action="default", category="Hello World") # Not understandable
warnings.simplefilter(action="default", category=100)                 # Not understandable
warnings.simplefilter(action="default", category=3.14)                # Not understandable
warnings.simplefilter(action="default", category=3.14+0.j)          # Not understandable
warnings.simplefilter(action="default", category=True)                # Not understandable

print(warnings.filters)
# [('default', None, True, None, 0),
#  ('default', None, (3.14+0j), None, 0),
#  ('default', None, 100, None, 0),
#  ('default', None, 'Hello World', None, 0),
#  ('default', None, <class 'Warning'>, None, 0)]

So, category argument of warnings.simplefilter() should also return the error message as shown below:

AssertionError: category must be a class

CPython versions tested on:

3.12

Operating systems tested on:

Windows

Linked PRs

• gh-136303
• gh-136305

Start with the warnings.simplefilter() and warnings.filterwarnings() entry points shown in the report, comparing how each validates its category argument. Reproduce the examples with invalid values and confirm that simplefilter() raises the same category validation error as filterwarnings().