Book Image

Python Business Intelligence Cookbook

Book Image

Python Business Intelligence Cookbook

Overview of this book

The amount of data produced by businesses and devices is going nowhere but up. In this scenario, the major advantage of Python is that it's a general-purpose language and gives you a lot of flexibility in data structures. Python is an excellent tool for more specialized analysis tasks, and is powered with related libraries to process data streams, to visualize datasets, and to carry out scientific calculations. Using Python for business intelligence (BI) can help you solve tricky problems in one go. Rather than spending day after day scouring Internet forums for “how-to” information, here you’ll find more than 60 recipes that take you through the entire process of creating actionable intelligence from your raw data, no matter what shape or form it’s in. Within the first 30 minutes of opening this book, you’ll learn how to use the latest in Python and NoSQL databases to glean insights from data just waiting to be exploited. We’ll begin with a quick-fire introduction to Python for BI and show you what problems Python solves. From there, we move on to working with a predefined data set to extract data as per business requirements, using the Pandas library and MongoDB as our storage engine. Next, we will analyze data and perform transformations for BI with Python. Through this, you will gather insightful data that will help you make informed decisions for your business. The final part of the book will show you the most important task of BI—visualizing data by building stunning dashboards using Matplotlib, PyTables, and iPython Notebook.
Table of Contents (12 chapters)
Python Business Intelligence Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Creating a Pandas DataFrame from a MongoDB query


To create a Pandas DataFrame from a MongoDB query, we will leverage our knowledge of creating MongoDB queries to get the information that we want.

Getting ready

Before running a query against MongoDB, determine the information you want to look at. By creating a query filter, you will save time by only retrieving the information that you want. This is very important when you have millions or billions of rows of data.

How to do it…

The following code can be run in an IPython Notebook or copied/pasted into a standalone Python script:

  1. To create a Pandas DataFrame from a MongoDB query, the first thing we need to do is import the Python libraries that we need:

    import pandas as pd
    from pymongo import MongoClient
  2. Next, create a connection to the MongoDB database:

    client = MongoClient('localhost', 27017)
  3. After that, use the connection we just created, and select the database and collection to query:

    db = client.pythonbicookbook
    collection = db.accidents
  4. Next...