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PyMongoArrow is a companion library to PyMongo that contains tools for loading MongoDB query result sets as Apache Arrow tables, Pandas DataFrames or NumPy arrays.
>>> from pymongoarrow.monkey import patch_all
... patch_all()
... from pymongoarrow.api import Schema
... schema = Schema({"_id": int, "qty": float})
... from pymongo import MongoClient
... client = MongoClient()
... client.db.data.insert_many(
... [{"_id": 1, "qty": 25.4}, {"_id": 2, "qty": 16.9}, {"_id": 3, "qty": 2.3}]
... )
... data_frame = client.db.test.find_pandas_all({}, schema=schema)
... data_frame
_id qty
0 1 25.4
1 2 16.9
2 3 2.3
... arrow_table = client.db.test.find_arrow_all({}, schema=schema)
# The schema may also be omitted
... arrow_table = client.db.test.find_arrow_all({})
... arrow_table
pyarrow.Table
_id: int64
qty: double
... ndarrays = client.db.test.find_numpy_all({}, schema=schema)
... ndarrays
{'_id': array([1, 2, 3]), 'qty': array([25.4, 16.9, 2.3])}
PyMongoArrow is the recommended way to materialize MongoDB query result sets as contiguous-in-memory, typed arrays suited for in-memory analytical processing applications.
PyMongoArrow is available on PyPI:
python -m pip install pymongoarrow
To use PyMongoArrow with MongoDB Atlas' mongodb+srv://
URIs, you will
need to also install PyMongo with the srv
extra:
python -m pip install 'pymongo[srv]' pymongoarrow
To use PyMongoArrow APIs that return query result sets as pandas
DataFrame instances, you will also need to have the pandas
package
installed:
python -m pip install pandas
Note: pymongoarrow
is not supported or tested on big-endian systems
(e.g. Linux s390x).
See the instructions in the [Contributing Guide][./CONTRIBUTING.md]
Full documentation is available on Read the Docs.
FAQs
Tools for using NumPy, Pandas, Polars, and PyArrow with MongoDB
We found that pymongoarrow demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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