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Learning pandas - Second Edition by Michael Heydt

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Accessing Data

In almost any real-world data analysis, you need to load data from outside your program. Since pandas is built on Python, you can use any means available in Python to retrieve data. This makes it possible to access data from an almost unlimited set of sources, including but not limited to files, Excel spreadsheets, websites and services, databases, and cloud services.

However, when using standard Python functions to load data, you need to convert Python objects into pandas Series or DataFrame objects. This increases the complexity of your code. To help with managing this complexity, pandas offers a number of facilities to load data from various sources directly into pandas objects. We will examine many of these in this chapter. ...

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