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MongoDf

Python Package PyPI Documentation

A mongoDB to pandas DataFrame converter with a pandas filter style.

Install

pip install mongodf

Filter Example

import mongodf
import pymongo

mongo = pymongo.MongoClient("mongodb://mongo:27017")

# create a dataframe from a mongoDB collection
df = mongodf.from_mongo(mongo, "DB", "Collection")

# filter values
df = df[(df["colA"] == "Test") & (df.ColB.isin([1, 2]))]

# filter columns
df = df[["colA", "colC"]]

# compute a pandas.DataFrame
df.compute()
colA colC
0 Test NaN
1 Test 12

Cache Example

import plotly.express as px
df = px.data.gapminder()

cache = MongoDFCache(
    host="mongodb://mongo:27017",
    database="mongodfcache",
    expire_after_seconds=20,
)

# put the dataframe into the mongo cache
# the name can be auto generated, array_group can be a list of cols
id = cache.cache_dataframe(df, "test_df", array_group=True)

# get a mongodf without reading all the data
cdf = cache.get_dataframe(id)

# get the metadata and the content of the dataframe
gcdf.get_meta()
gcdf.compute()

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