[Bug]: `ModuleNotFoundError: No module named 'scipy'`

[JakeSummers]

Describe the bug

Importing almost anything from pymilvus, for example:

from pymilvus import Collection

Results in an exception being raised:

  File "/Users/jacob.summers/repos/ads-korok-pipeline/korok_inference/datamodels/request_context.py", line 5, in <module>
    from pymilvus import Collection
  File "/Users/jacob.summers/Library/Caches/pypoetry/virtualenvs/korok-inference-jyWwJgRH-py3.10/lib/python3.10/site-packages/pymilvus/__init__.py", line 30, in <module>
    from .client.abstract import AnnSearchRequest, Hit, Hits, RRFRanker, SearchResult, WeightedRanker
  File "/Users/jacob.summers/Library/Caches/pypoetry/virtualenvs/korok-inference-jyWwJgRH-py3.10/lib/python3.10/site-packages/pymilvus/client/abstract.py", line 10, in <module>
    from . import entity_helper
  File "/Users/jacob.summers/Library/Caches/pypoetry/virtualenvs/korok-inference-jyWwJgRH-py3.10/lib/python3.10/site-packages/pymilvus/client/entity_helper.py", line 7, in <module>
    from scipy import sparse
ModuleNotFoundError: No module named 'scipy'

Root cause

It looks like this issue was introduce somewhere between 2.3.7 and 2.4.0.

In version2.4.0 scipy is imported in pymilvus/client/entity_helper.py despite the fact that scipy is not listed as a dependency of pymilvus:

$ poetry show pymilvus
 name         : pymilvus
 version      : 2.4.0
 description  : Python Sdk for Milvus

dependencies
 - azure-storage-blob *
 - environs <=9.5.0
 - grpcio >=1.49.1,<=1.60.0
 - minio >=7.0.0
 - pandas >=1.2.4
 - protobuf >=3.20.0
 - pyarrow >=12.0.0
 - requests *
 - setuptools >=67
 - ujson >=2.0.0

Workaround

Install scipy via poetry add scipy or pip ....

[zhengbuqian]

thanks! dependency for scipy has been removed in #2074, though pymilvus may still use it if available in the env.