Help misuse of options argument.

[ueshin]

I have sometimes seen misuse of a keyword argument options in read_xxx/to_xxx functions. E.g.,

kdf = ks.read_csv(..., options={ ... })

In this case, the argument options is actually {'options': { ... }}, which is not what the user wants to do.

We can help those cases by getting the 'options' value.

[itholic]

This way is not currently supported in pandas, right?

>>> pd.read_csv('test.csv', options={'engine': None})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: parser_f() got an unexpected keyword argument 'options'

But It's LGTM though since I think It will not not harm the experience of the existing pandas users.

[HyukjinKwon]

It's not supported in pandas because options here means PySpark specific options.