DOC: Fix examples in pandas/core/ops/

[ShaharNaveh]

• closes #xxxx
• tests added / passed
• passes black pandas
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• whatsnew entry

[datapythonista]

lgtm, thanks @MomIsBestFriend

I think in a follow up would be good to have a single call for all the doctests. Not sure why we group few cases, then call some files individually...

Also, if you keep fixing tests, may be you can fix one directory at a time. So, for example, instead of having to call evey file in pandas/core/arrays separetely, we can just have one call for the whole directory.

Ideally, at some point we simply want to have a call to pytest -q --doctest-modules pandas

Thanks!

[ShaharNaveh]

lgtm, thanks @MomIsBestFriend

I think in a follow up would be good to have a single call for all the doctests. Not sure why we group few cases, then call some files individually...

Also, if you keep fixing tests, may be you can fix one directory at a time. So, for example, instead of having to call evey file in pandas/core/arrays separetely, we can just have one call for the whole directory.

Ideally, at some point we simply want to have a call to pytest -q --doctest-modules pandas

Thanks!

@datapythonista Exactly, this is what I am aiming for.

And about the reason why there are "groupings" of, some of them are there for legacy reasons and the other reason is to have it as a "placeholder", I was afraid that even if a file is fixed, overtime it will become "wrong" agian, so this is just putting things in the "safe" place.

[simonjayhawkins]

pandas/pandas/core/ops/missing.py

Lines 164 to 167 in 6f93898

	elif op is operator.floordiv:
	# Note: no need to do this for truediv; in py3 numpy behaves the way
	# we want.
	result = mask_zero_div_zero(left, right, result)

maybe update the docstring to reflect this change.

[ShaharNaveh]

@simonjayhawkins I'm not sure I understand what to update, can you be more specific?

[simonjayhawkins]

pandas/pandas/core/ops/missing.py

Lines 73 to 76 in 6f93898

	def mask_zero_div_zero(x, y, result):
	"""
	Set results of 0 / 0 or 0 // 0 to np.nan, regardless of the dtypes
	of the numerator or the denominator.

[simonjayhawkins]

Thanks @MomIsBestFriend lgtm. ping on green

[ShaharNaveh]

ping @simonjayhawkins

[simonjayhawkins]

Thanks @MomIsBestFriend