Support passing np.timedelta64 to parameters that expect a sequence (e.g., 'region')

[seisman]

Related to #2848.

import pygmt
import numpy as np

fig = pygmt.Figure()
fig.basemap(
    projection="X8c/5c",
    region=[np.timedelta64(0, "D"), np.timedelta64(8, "D"), 0, 10],
    frame=["WSne", "xaf+lForecast Days", "yaf+lRMSE"],
)
fig.plot(
    x=np.arange(np.timedelta64(0, "D"), np.timedelta64(8, "D")),
    y=np.geomspace(start=0.1, stop=9, num=8),
    style="c0.2c",
    pen="1p",
)
fig.show()

[Copilot]

Pull request overview

This PR adds support for passing np.timedelta64 objects to parameters that expect a sequence, such as the region parameter in GMT plotting functions. The implementation converts timedelta64 objects to their numeric values in their original units when joining sequences into strings.

Changes:

• Modified sequence_join function in pygmt/helpers/utils.py to handle np.timedelta64 objects by extracting their numeric values
• Updated test_plot_timedelta64 test to use timedelta64 objects in the region parameter, testing the new functionality
• Added comprehensive docstring examples showing timedelta64 handling with various time units

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
pygmt/helpers/utils.py	Added timedelta64 handling logic to convert timedelta64 objects to numeric strings, and updated docstring with examples
pygmt/tests/test_plot.py	Refactored test to use timedelta64 objects in the region parameter, testing the new functionality

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[codspeed-hq]

CodSpeed Performance Report

Merging this PR will not alter performance

_{Comparing timedelta64/support (e222f52) with main (88dcf01)¹}

Summary

✅ 104 untouched benchmarks

Footnotes

1. No successful run was found on main (2276659) during the generation of this report, so 88dcf01 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩