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Learning pandas - Second Edition by Michael Heydt

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Retrieval

Once you have an idea you must then find data to try and support your hypothesis. This data can come from within your organization or from external data providers. This data normally is provided as archived data or can be provided in real-time (although pandas is not well known for being a real-time data processing tool).

Data is often very raw, even if obtained from data sources that you have created or from within your organization. Being raw means that the data can be disorganized, may be in various formats, and erroneous; relative to supporting your analysis, it may be incomplete and need manual augmentation.

There is a lot of free data in the world. Much data is not free and actually costs significant amounts of money to obtain. ...

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