Must stream updates to all existing columns

Streaming a data frame with same columns and index raises ‘Must stream updates to all existing columns’

from bokeh.plotting import figure
from bokeh.models import ColumnDataSource
import pandas as pd

df = pd.DataFrame(index= pd.date_range('20160701', '20160710', freq='1T', name='time'), 
                                      columns=['X', 'Y'])
df['X'] = df.reset_index().index
df['Y'] = df.X * df.X

source = ColumnDataSource(df)
source.stream(df) 

[satyan-g]

Hi, point taken about the process. That said, this is still an issue, so not sure why this was closed. Note that the ColumnDataSource was created and stream’d using the same dataframe with no structural changes to the dataframe in between (there is no addition or deletion of columns going on here), and it still fails. It seems both the constructor and stream() are converting ‘time’, the index, to a regular column, but the check in stream() is not taking index in to account.

In fact, this also fails with a simple dataframe with default index. For example:

In [13]: df = pd.DataFrame({‘X’ : range(100)}) In [14]: source = ColumnDataSource(df) In [15]: source.stream(df)

---

ValueError Traceback (most recent call last) <ipython-input-15-fdf154a68872> in <module>() ----> 1 source.stream(df)

e:\3rdParty\Enthought1.5.5b\lib\site-packages\bokeh\models\sources.pyc in stream(self, new_data, roll over) 231 raise ValueError(“Must stream updates to all existing columns (missing: %s, e xtra: %s)” % (", ".join(sorted(missing)), ", ".join(sorted(extra)))) 232 elif missing: –> 233 raise ValueError(“Must stream updates to all existing columns (missing: %s)” % ", ".join(sorted(missing))) 234 else: 235 raise ValueError(“Must stream updates to all existing columns (extra: %s)” % ", ".join(sorted(extra)))

ValueError: Must stream updates to all existing columns (missing: index)

[bryevdv]

was this fixed?

it would be easier to answer your question if you had included version information. (Please always include version information, in any issue, anywhere) It would be even better if you had included a complete code sample. I would have been able to just run it on master and answer definitively immediately. As it is, all I can say is there were previous PRs merged that were possibly related:

https://github.com/bokeh/bokeh/pull/6738 https://github.com/bokeh/bokeh/pull/7379

If either of those is later than your installed version, try upgrading.