By Swaroop C H

'A Byte of Python' is a ebook on programming utilizing the Python language. It serves as an instructional or consultant to the Python language for a newbie viewers. If all you recognize approximately pcs is how one can keep textual content records, then this is often the e-book for you.

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Multiprocessing is also a feasible approach sometimes, as Python has good library support for creating and managing threads with several libraries such as multiprocessing, threading, and thread. If processing huge files is a repeated process for a project, we suggest building your data pipeline so that every time you need data ready in a specific format on the output end, you don't have to go to the source and do it manually. Reading streaming data sources What if the data that is coming from the source is continuous?

But just for clarity, we will explain the SQL query in this code sample: SELECT ID, Name, Population FROM City ORDER BY Population DESC LIMIT 1000 ID, Name, and Population are columns (fields) of the table City from which we select data. ORDER BY tells the database engine to sort our data by the Population column, and DESC means descending order. LIMIT allows us to get just the first 1,000 records found. sql example table, which holds the world's city names and populations. This table has more than 5,000 entries.

The function for import needs to change if we want to import a new kind of data source. If we want to add a new export format, we need to first add functions that will return a stream of formatted data. Then, we need to update the write_data() function to add the new elif branch to have it call our new write_* function. 35 Knowing Your Data One thing we could also do is make this a Python package, so we can re-use it over more projects. In that case, we would like to make import more flexible and maybe add some more configuration features for import.

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