I'm looking at some of the shapely 1.8 deprecation impacts in a niche package, and I'm stumbling over one issue that can be represented in a small example:

import numpy as np
from shapely.geometry import Point, MultiPoint
mp = MultiPoint([Point(1, 2), Point(3, 4)])
mp_list = [mp]
a = np.empty(len(mp_list), dtype=object)
a[:] = mp_list
print(a[0].wkt)

This example works for all current and development versions of shapely, printing MULTIPOINT (1 2, 3 4) from the object array.

Shapely 1.7 does not show any warnings.

Shapely 1.8dev shows two warnings:

/usr/bin/ipython3:1: ShapelyDeprecationWarning: __len__ for multi-part geometries is deprecated and will be removed in Shapely 2.0. Check the length of the geoms property instead to get the number of parts of a multi-part geometry.
#! /bin/sh
/usr/lib/python3/dist-packages/IPython/core/interactiveshell.py:2882: ShapelyDeprecationWarning: The array interface is deprecated and will no longer work in Shapely 2.0. Convert the '.coords' to a numpy array instead.
exec(code_obj, self.user_global_ns, self.user_ns)

Shapely 2.0dev does not show any warnings, and works the same as any other version.

It seems that the warnings from shapely 1.8dev are crying wolf. I understand these shenanigans are permitted with object arrays. Is there any way for shapely 1.8 to omit these warnings? Or should I just refactor to ether of these?

a = np.empty(len(mp_list), dtype=object)
for idx, obj in enumerate(mp_list):
    a[idx] = obj

# or

import warnings
with warnings.catch_warnings():
    warnings.simplefilter("ignore")
    a = np.empty(len(mp_list), dtype=object)
    a[:] = mp_list