python - pandas drop duplicates of one column with criteria -

-

I have such a datafile: 

  AB 239616412 none 239616414 Name 2 239616417 None 239616417 None 239616417 None 239616418 Name 1 23 9 616418 None 23 9 616428 Name 1 23 9 616429 None 23 9 616429 None 23 9 616429 Name 1

I I want to delete the duplicate of column A, and I want to put that line in which there is a name in it (! = None, originally) in column B, but if there is no value in all duplicates, then I still want to keep it (like 23 9 616417 ).

It should be reduced: 

  AB 239616412 None 23 9 616414 Name 2 23 9 616417 None 23 9 616418 Name 1 23 9 616428 Name 1 23 9 616429 Name 1  

  df.sort ('B', inplace = True) DF out [24]: AB 5 23 9 616418 Name 1 7 23 9 616428 Name 1 10 23 9 616429 Name 1 1 23 9616414 Name 2 0 23 9 616412 Nain 2 23 9 616417 Nain 3 23 9 616417 Nain 4 23 9 616417 NAN 6 23 9 616418 NAN 8 23 9 616429 Nain 9 23 9 616429 Nain

Then drop duplicate wrt column 'A': 

  df .drop_duplicates ('a', inplace = true) df out [26]: ab 5 23 9 616418 name 1 7 23 9 616428 Name 1 10 23 9 616429 Name 1 1 23 9 616414 Name 2 0 23 9 616412 NAN 2 239616417 NAN

You can re-sort the data frame to get exactly the same: 

  df.sort (inplace = True) df Out [30]: AB 0 23 9 616412 Nain 1 23 9 616414 Name 2 2 23 9 616417 Nain 5 23 9 616418 Name 1 7 23 9 616428 Name 1 10 23 9 616429 Name 1

Comments

Post a Comment

Popular posts from this blog

apache - 504 Gateway Time-out The server didn't respond in time. How to fix it? -

-
Using a form submission on an embedded iframe , the customer downloads a compressed log file Requested. The request was sent to the server, which is the compressed log files, perform some database operations and returns a compressed file. After just 2 minutes, 504 gateway time-out server did not respond timely message on browser net panel How to fix this error? The log files were taking a long time to compress, and timeout was set to 2min The error was fixed by extending the file file: # # timeout: The number of seconds before getting the time out. # # # Timeout 120 timeout 600
Read more

c# - .net WebSocket: CloseOutputAsync vs CloseAsync -

-
We have a working ASP.NET Web API REST service, which is one of the methods of our controller, HTTPTTEX. .) Socket handler code looks something like this ... Public async task socket handler (AspNetWebSocketContext context) {_webSocket = context.WebSocket; ... while (! Cts.IsCancellationRequested) {WebSocketReceiveResult Results = _webSocket.ReceiveAsync (Input Segment, cts.Token) .Result; WebSocketsStateCollusocketState = _webSocket.State; If (result.MessageType == WebSocketMessageType.Close || currentSocketState == WebSocketState.CloseReceived) {// What should I use. CloseAysnc () or. CloseOutputAsync ()? _webSocket.CloseOutputAsync (WebSocketCloseStatus.NormalClosure, "Client Requested", cts.Token). Wait (); } If (currentSocketState == WebSocketState.Open) {...}}} .What is the difference between .CooseAsync () and CloseOutputAysnc ()? I tried both of them and they both seemed to work fine but some difference should be the same they both describe very similar to...
Read more

c++ - How to properly scale qgroupbox title with stylesheet for high resolution display? -

-
I am trying to apply a stylesheet for QGroupBox (QT4.8), which works on the normal screen ( 96 dpi) high resolution screen (Yoga 2 Pro, 3200x1800, 275 dpi, windows 8.1). The following style looks good on the 275 dpi screen, but the top margins on a regular 96 dpi screen are far too big. QGroupBox {border: 1px solid red; Range radius: 7px; Margin-top: 12x; } QGroupBox :: Title {subcontrol-origin: margin; Subcontrol-position: left above; Padding-left: 10px; Padding-right: 10px; } Changing the top-margin has an effect, but I did not get a proper setting which works on both screens. If I shorten the value, the content of the group box overlaps with the title on 275 dpi screen. I was also playing with units "East", "PX", "MX", "PT". Reading the document I would have guessed, "2 X" was the correct solution, which should be scaled with different screen resolutions. Without the stylesheet, the groupbox works well on both screens. ...
Read more