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Fix bug where numpy datetime contained in Python list gets converted to integer #5415

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Merged
emilykl merged 3 commits into from
Nov 12, 2025
+32 −2
Merged

Fix bug where numpy datetime contained in Python list gets converted to integer #5415

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0a13e4f
add handling for special case where np datetime contained in Python l…
emilykl Nov 10, 2025
4d4fa4f
add test for datetime64[ns]
emilykl Nov 11, 2025
aa30be5
Update _plotly_utils/basevalidators.py
emilykl Nov 12, 2025
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add test for datetime64[ns]
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@emilykl
emilykl committed Nov 11, 2025
commit 4d4fa4f99b1ba555f1346776fb6d03311e0ef69e
16 changes: 16 additions & 0 deletions tests/test_optional/test_graph_objs/test_numpy.py
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from datetime import datetime

import numpy as np

import plotly.graph_objs as go


def test_np_ns_datetime():
x = [np.datetime64("2025-09-26").astype("datetime64[ns]")]
y = [1.23]
scatter = go.Scatter(x=x, y=y, mode="markers")

# x value should be converted to native datetime
assert isinstance(scatter.x[0], datetime)
# x value should match original numpy value at microsecond precision
assert x[0].astype("datetime64[us]").item() == scatter.x[0]