python - Multiple conditions in selecting pandas dataframe -


i have 2 similar dataframes. df1 , df2 same structure. , have same data in 1 column(policyid) , other columns may have different data , 1 column contains timestamp based on need segregate them. df1 - 

policyid,statecode,county,timestamp 114455,fl,clay county,2015-12-23

df2- 

policyid,statecode,county,timestamp 114455,fl,clay county,2016-12-34

i need create new dataframe df3 contains data df1 if timestamp of df1 higher , df2 if timestamp of df2 higher.

i think need concat sort_values, last need groupby first or first:

print (df1)             0    1             2           3 0  114453   fl   clay county  2016-12-23 1  114455  fl1  clay county1  2016-12-11 2  114457  fl1  clay county1  2016-12-11  print (df2)         0    1             2           3 0  114453  fl1  clay county1  2016-12-15 1  114455  fl1  clay county1  2016-12-15 2  114457  fl1  clay county1  2016-12-15  df1.iloc[:,3] = pd.to_datetime(df1.iloc[:,3]) df2.iloc[:,3] = pd.to_datetime(df2.iloc[:,3])  df3 = pd.concat([df1,df2]) df3 = df3.sort_values(df3.columns[3]).groupby(df3.columns[0]).first() print (df3)           1             2          3 0                                    114453  fl1  clay county1 2016-12-15 114455  fl1  clay county1 2016-12-11 114457  fl1  clay county1 2016-12-11 
df3 = pd.concat([df1,df2]) df4 = df3.sort_values(df3.columns[3]).groupby(df3.columns[0]).last() print (df4)           1             2          3 0                                    114453   fl   clay county 2016-12-23 114455  fl1  clay county1 2016-12-15 114457  fl1  clay county1 2016-12-15

Comments

Post a Comment

Popular posts from this blog

asynchronous - C# WinSCP .NET assembly: How to upload multiple files asynchronously -

i using winscp .net assembly uploading files. want upload multiple files asynchronous way. have created method works single upload. public class uploadingdata { private sessionoptions _sessionoptions; private session _session; //connection etc private void onconnected() { foreach (var fileinfo in localfileslist) { var task = task.factory.startnew(() => uploadfilesasync(fileinfo)); } } private async task uploadfilesasync(string file) { string remotefilepath = _session.translatelocalpathtoremote(file, @"/", "/test_data_upload"); var uploading = _session.putfiles(file, remotefilepath, false); //when done await task.run(() => thread.sleep(1000)); } } please suggest me correct way. thanks you can use backgroundworker class this: string[] images = new string[50]; foreach (var path in images) { backgroundworker
Read more

aws api gateway - SerializationException in posting new Records via Dynamodb Proxy Service in API -

i getting "__type": "com.amazon.coral.service#serializationexception" as reply in postman & in test console in api gateway trying post record directly dynamodb using api proxy services.. referring aws article - https://aws.amazon.com/blogs/compute/using-amazon-api-gateway-as-a-proxy-for-dynamodb/ here's mapping { "tablename": "tablenamegoeshere", "item": { "id" : "$context.requestid" "eventname" : "$input.path('$.eventname')", "timestamp" : $input.path('$.timestamp'), "answers": "$util.parsejson($input.path('$.answers'))" } } update: did asked ... , worked if try add array of json objects gives me above same error - here's trying now. please - couldnt find on google well #set($inputroot = $input.path('$')) { "tablename": "answer", "item": {
Read more

asp.net - Problems sending emails from forum -

i have been redesigning site has message board, has been written guy looked after site. it has few problems , written in .asp , uses .mdb files database. you can see whole thing here . feel free post if helps, test thing have set using original files , new database. the basic problem when posts message, supposed email sent them, have posted it. when replies, originator supposed message, replier has been posted. i’d have thought @ point in process there should script/file in postmessage.asp? the postmessage.asp page below. <% option explicit %> <!-- #include virtual="common/adovbs.inc" --> <html> <head> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="microsoft frontpage 4.0"> <meta name="progid" content="frontpage.editor.document"> <title>new page 2</title> <base target="_self"
Read more