Getting error when initialize ColumnDataSource for a datetime value

Community Support
1

tried this exact code :

import pandas as pd

import numpy as np

from bokeh.models import ColumnDataSource, HoverTool, CDSView, GroupFilter

from datetime import datetime

last_value=100

last_timestamp = datetime.now()

data = ColumnDataSource(dict(timestamp=, value=))

value_df = pd.DataFrame({“value”:last_value,

“timestamp”:last_timestamp}, index=[0])

data.stream(dict(timestamp=value_df[“timestamp”], value=value_df[“value”]), 10)

i get the following error :

TypeError: invalid type promotion

Plz help.

1 Like
2

Using lists instead of dataframe solved the problem.

···

On Sunday, October 21, 2018 at 10:48:00 PM UTC+5:30, sidbazinga wrote:

tried this exact code :

import pandas as pd

import numpy as np

from bokeh.models import ColumnDataSource, HoverTool, CDSView, GroupFilter

from datetime import datetime

last_value=100

last_timestamp = datetime.now()

data = ColumnDataSource(dict(timestamp=, value=))

value_df = pd.DataFrame({“value”:last_value,

“timestamp”:last_timestamp}, index=[0])

data.stream(dict(timestamp=value_df[“timestamp”], value=value_df[“value”]), 10)

i get the following error :

TypeError: invalid type promotion

Plz help.