BUG: GH10160 in DataFrame construction from dict with datetime64 index

[kawochen]

closes #10160
closes #9456
where DataFrame/Series construction from nested dict with datetime64 index returns a DataFrame\Series of NaNs.

[jreback]

pls rebase on master and repush had an issue in the builds

[jreback]

for completeness, pls also do a test (you can use a loop), with datetime.datetime and Timestamp (expected should be the same)

[jreback]

ok, this overlaps with the issue in #9456 , currently with a PR of #9924 to fix

[jreback]

lets define a function someting like:

put in pandas.core.common

def _dict_compat(d):
    return { _maybe_box_datetimelike(key) : value for key, value in compat.iteritems(d) } 

then can use in both places.

[jreback]

@kawochen looks good so far. can you add in tests/fix for #9456 ?
i'd like to fix both in this PR (this PR can then supersede #9924)

[kawochen]

Sure I will do that.

[jreback]

@kawochen any progress on this? (e.g. incorporating the Series fix as well)

[kawochen]

Yes I did that a few days ago. I squashed the commits when I rebased (I'm new to github, maybe I shouldn't have?).

[jreback]

merged via 821542f

thanks!

FYI, when you push again, I don't know you updated (e.g. there is no notiifcation on that, only on a new PR). So if you want me to have a look, ping!