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General Functions in Python

How to Convert Datetime to Date in Pandas

Often you may want to convert a datetime to a date in pandas. Fortunately this is easy to do using the .dt.date function, which...

How to Count Missing Values in a Pandas DataFrame

Often you may be interested in counting the number of missing values in a pandas DataFrame. This tutorial shows several examples of how to count...

How to Find Unique Values in Multiple Columns in Pandas

Often you may be interested in finding all of the unique values across multiple columns in a pandas DataFrame. Fortunately this is easy to...

How to Merge Pandas DataFrames on Multiple Columns

Often you may want to merge two pandas DataFrames on multiple columns. Fortunately this is easy to do using the pandas merge() function, which...

How to Merge Two Pandas DataFrames on Index

Often you may want to merge two pandas DataFrames by their indexes. There are three ways to do so in pandas: 1. Use join: By...

How to Stack Multiple Pandas DataFrames

Often you may wish to stack two or more pandas DataFrames. Fortunately this is easy to do using the pandas concat() function. This tutorial shows...

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