Merging a dataframe and a series on 2 columns using Pandas/Python -

-

i using python/pandas , have dataframe (1) below. have grouped id, , taken max of revision number in each group of revisions against each id produce series (2) below.

i want merge (1) (2) in such way match first 2 columns of (1) corresponding columns of (2), pulling in other column in (2) appropriately [in data set of (1), 'id', 'revision' , 'colour' not consecutive columns, , there other columns].

i treating (2) key , pulling in appropriate data (1).

how do using pandas?

thanks in advance.

max.

(1) dataframe

id         revision colour 14446   0   red 14446   0   red 14446   0   red 14466   1   red 14466   1   red 14466   0   red 14466   1   red 14466   1   red 14466   0   red 14466   2   red 14466   0   red 14466   1   red 14466   0   red 14471   0   green 14471   0   green 14471   0   green 14471   0   green 14473   0   blue 14473   1   blue 14473   0   blue

(2) series

id                   revision 13125                 1 13213                 0 13266                 0 13276                 0 13277                 1 13278                 0 13280                 2 13285                 0 13287                 1 13288                 0 13291                 1 13292                 1

sort revision, group id , take last element each group.

in [2]: df.sort('revision').groupby(level=0).last() out[2]:         revision colour id                     14446         0    red 14466         2    red 14471         0  green 14473         1   blue

i assumed id index. if it's column, groupby('id') instead.


Comments

Post a Comment

Popular posts from this blog

ios - UICollectionView Self Sizing Cells with Auto Layout -

-
Image
i'm trying self sizing uicollectionviewcells working auto layout, can't seem cells size content. i'm having trouble understanding how cell's size updated contents of what's inside cell's contentview. here's setup i've tried: custom uicollectionviewcell uitextview in contentview. scrolling uitextview disabled. the contentview's horizontal constraint is: "h:|[_textview(320)]", i.e. uitextview pinned left of cell explicit width of 320. the contentview's vertical constraint is: "v:|-0-[_textview]", i.e. uitextview pinned top of cell. the uitextview has height constraint set constant uitextview reports fit text. here's looks cell background set red, , uitextview background set blue: i put project i've been playing on github here . updated ios 9 after seeing github solution break under ios 9 got time investigate issue fully. have updated repo include several examples of different configurations s
Read more

node.js - ldapjs - write after end error -

-
i have created authentication service using following code in node.js , ldapjs. var when = require ('when'); var authenticationerror = require('../errors/authenticationerror'); var sessionmanagerservice = require('./sessionmanagerservice'); var ldap = require('ldapjs'); var client = ldap.createclient({ url: 'ldaps://ad.mycompany.com:636', tlsoptions: {'rejectunauthorized': false} }); module.exports = { signin: function (email, password) { return this.ldapbind(email, password).then( function () { return sessionmanagerservice.createsessionhash({email: email}); } ); }, ldapbind: function (email, password) { var deferred = when.defer(); client.bind(email, password, function(err) { if (err) { deferred.reject (new authenticationerror('invalid username and/or password!', 'authentication.signin.error')
Read more

DOM Manipulation in Wordpress (and elsewhere) using php -

-
DOM Manipulation in Wordpress (and elsewhere) using php - i'm quite new dom manipulation world , head start in order avoid mutual errors. i looking efficient way manipulate content generated wordpress using php. @ moment using simple html dom seems work fine. found domdocument , few others , helpfull if cleared out 1 faster, improve or @ to the lowest degree generate less errors in case of bad markup. also on side can explain syntax (instead of $html @$html) thank much php wordpress domdocument simple-html-dom
Read more