python - reverse dataframe's rows' order with pandas -


how can reverse order of rows in pandas.dataframe?

i've looked everywhere , thing people talking sorting columns, reversing order of columns...

what want simple :

if dataframe looks this:

        b     c  ------------------   love          mat   ters

i want become this: 

        b     c  ------------------     mat   ters   love

i know can iterate on data in reverse order that's not want.

check out http://pandas.pydata.org/pandas-docs/stable/indexing.html

you can do

reversed_df = df.iloc[::-1]

Comments

Post a Comment

Popular posts from this blog

sublimetext3 - what keyboard shortcut is to comment/uncomment for this script tag in sublime -

Image
i have script tag in code, keyboard shortcut comment/uncomment script tag in sublime. after selecting script open , close tag. <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"> </script> i pressing ctrl + shift + / , getting this /*<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"> </script>*/ also pressed ctrl + / , got this // <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"> // </script> instead of <!-- <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"> </script> --> script open , close tag in 2 lines not in 1 line , not have spaces too. for mac,high light lines want comment. hold 'command , / ' commented. for windows: high line or select lines ,then hold ctrl + / if not work: ...
Read more

ios - MKMapView fails to load tiles with HTTP 410 error -

i have problem mkmapview . map fails load tiles when zoom in. -(void)mapviewdidfailloadingmap:(mkmapview *)mapview witherror:(nserror *)error error: domain=geoerrordomain code=-204 "(null)" userinfo={simpletilerequesterunderlyingerrors=( "error domain=geoerrordomain code=-204 \"(null)\" userinfo={httpstatus=410, nserrorfailingurlstringkey= http://gspe19.ls.apple.com/tile.vf?flags=1&style=20&size=2&scale=0&v=11037825&z=15&x=6205&y=12336&sid=0246704635757302674107153038443966765357&accesskey=1454685602_q3bvuyvhbdxsso0a_j0fk7eyq9b21npshv7grlzr4wfkkhxb4vo7%2blxcgsxj4zzhvhtalvwsypa3plu60cdrmrfwmwcybgrla9mchv%2fhorhotu9agi72vqp9ukzw%2b0gkqfrhpcw4xr%2f%2fttvgjz7wu4u4kna8k2rvvq%2foffhjq7oo4nyectvy0ur4i9d3sxf%2btn9dcxu8agdrjignb }", ... edit: seems related cache somehow, i'm not sure. problem disappears time after loading same map region in maps application. thanks in advance i analysed , d...
Read more

c# - How to utilize EF and LINQ to add filters and specify tables, columns, filters and order by dynamically -

Image
i have database structure (all parent , childs tables), what doing now want create ad hoc reporting page, let user select tables , columns in these tables. when user select tables , columns, can add filters (is in list or contains or filter etc..) columns. i send information json web service create, in web service planning use entityframework required dataset. what have done i able create html ui, web services, database layer repositories , uow, database etc.. question i mean can this, var result = context.parenta.include("child1.subchild1").include(....).where(.. but not sure how can specify columns want or add filters. for specifying column names can use select linq query : var result = context.parenta.include("child1.subchild1").include(....).where(..).select(s=> new {name = s.parentname , subname = s.subchild.name }); for adding filters need define them in clause .where(p=>p.name.contains("somevalue")) ...
Read more