ER: In HDFStore create warnings for mode, quiet

[jreback]

• If mode == 'w' and warn==True then weird raw_input is requested. Change this to raise/warn as appropriate
• change the _quiet field (default is False) to a warning (about duplicates in readback)

[jtratner]

When I was looking at this before, was thinking that store could change mode from w after opening so that it doesn't overwrite on a second write. (i.e., at end of the handle open part, just change mode to whatever seems appropriate - user can change mode explicitly if they want...)

[jreback]

I always open as append mode (personally)

I simulate w by removing the file

I think that might be the way to go here

then u don't need to track status of the mode

[jreback]

@jtratner changed the API slightly on open/closes....let me know if you think it makes sens

[jtratner]

I think I proposed it but then never got to it, because I wasn't sure what real-world uses would do.

[jtratner]

heh, so what I proposed is actually at the top of this issue 😝