.ix does not warn when selecting a none-existing column

[jankatins]

df3 = DataFrame({"a":[1,2,3,4], "b":[1,2,3,4]})
df3.ix[:,["b","c"]]
Out[1]: 
   b   c
0  1 NaN
1  2 NaN
2  3 NaN
3  4 NaN

I would have (had...) expected that the df3.ix[:,["b","c"]] will throw an error :-(

[changhiskhan]

@wesm was the original idea for ix to have it work like reindex or getitem? Feels more natural as getitem to me but just double checking

[lodagro]

See also my comment on #1799, which has similar scenario`s.

[wesm]

0.10

[jreback]

@JanSchulz

old issue, but this is expected behavior when selecting via a slice/list

[jreback]

closing as not a bug, expected behavior