Open suvayu opened 5 years ago
@suvayu
Can you post more information about your issue, as there's some known potential issues with some .csv files, but most of the .csvs i have been trying do open properly
Firstly, can you try to open up the data.csv in test/data included within this repository
1.Steps to reproduce(including the dateset you're trying) 2.Any relevant logs from jupyterlab 3.Any relevant logs from JavaScript console
@playermanny2 I digged a bit deeper, it turns out this error happens when there is an empty column name in the csv. In my case I had exported the csv from pandas with DataFrame.to_csv(..)
. By default (if you specify only the file name and nothing else, then header=True, index=True, index_label=None
), the column name for index is empty. When I manually edit and add the index column name, the csv opens without issues.
Since this is rather common, maybe Voyager should assume a place holder like: column_n
, if the column name is empty?
@suvayu
Thanks for digging into this deeper --will have to take a look at this a bit deeper to see if this is a problem with voyager itself not being able to handle empty column names or our extension.
The fallback seems like it could be a viable route
@suvayu per a quick test on http://vega.github.io/voyager/
This is the behavior directly from Voyager. I'm not sure if they chose not to create fallbacks for a valid reason -- usually it's best practice to not manipulate data received in anyway.
@saulshanabrook what do you think about adding in a fallback for handling empty columns in data?
When I open a CSV from the "Open with ..." menu, I get the error
![jupyterlab-voyager-bug](https://user-images.githubusercontent.com/229540/56786871-0e4de300-6818-11e9-94f9-009a3eb4a857.png)
String(...).match(...) is null
in a popup from Firefox, with a "OK" button. Clicking the button opens voyager, but none of the CSV columns are detected, and I can't visualise anything.