pd.option_context without 'with' changes option values

[jorisvandenbossche]

Just wondering if this is a bug, from http://stackoverflow.com/questions/26246864/restoring-the-default-display-context-in-pandas

If you use pd.option_context accidentally without with, this changes the default option values.

[jorisvandenbossche]

BTW, using reset_options generates deprecation warnings:

In [22]: pd.reset_option('all')
height has been deprecated.

line_width has been deprecated, use display.width instead (currently both are identical)

These should be suppressed here I think.

[jorisvandenbossche]

Should the option setting (https://github.com/pydata/pandas/blob/master/pandas/core/config.py#L394) happen in the __enter__ instead of __init__?

[jreback]

yep it looks like it should be happening in __enter__, then I suppose you could do:

i = pd.option_context(.......)
j = pd.option_context(.....different ones...)

with i:
    do something

with j:
    do something else