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how do you filter pandas dataframes by multiple columns

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Are tuples more efficient than lists in Python?

... When working with ~50k lists of ~100 element lists, moving this structure to tuples decreased lookup times by multiple orders of magnitude for multiple lookups. I believe this to be due to the greater cache locality of the tuple once you start ...
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XML Validation with XSD in Visual Studio IDE

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How to copy data to clipboard in C#

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Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc

... thought of. – Ankur Jun 4 '10 at 6:50 1 +1 for risks of breaking/catching mistakes early. I thin...
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Changing the size of a column referenced by a schema-bound view in SQL Server

... ALTER TABLE [table_name] ALTER COLUMN [column_name] varchar(150) share | improve this answer | follow | ...
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How to add an extra source directory for maven to compile and include in the build jar?

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How do I pull files from remote without overwriting local files?

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What does the caret operator (^) in Python do?

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Android preferences onclick event

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