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TypeError: Object of type 'Timestamp' is not JSON serializable
See original GitHub issueTrying to make a chart with pandas.Timestamp on the X axis and a floating point value on the Y axis.
alt.Chart(data).mark_line().encode(
x='timestamp:T',
y='value:Q'
)
I get the following error:
TypeError: Object of type 'Timestamp' is not JSON serializable
Tried various date/time methods described here but I always get this error.
Issue Analytics
- State:
- Created 5 years ago
- Comments:9 (5 by maintainers)
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Yeah, altair will serialize the entire dataset that you build a chart with, because it’s difficult to determine from the Python side which columns the renderer will reference.
Glad the problem is fixed!
Ahh, I had some other columns that were of type
objectand dropping those resolves the error. I was not aware that unused columns would cause an issue like that. Thanks for you help!