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Pandas 101

How to Filter Rows Based on Column Values with query function in Pandas?

April 15, 2020 by cmdlinetips

In this post, we will learn how to use Pandas query() function. Using query() function is a great way to to filter rows of Pandas dataframe based on values of another column in the dataframe. Basically Let us load Pandas and Numpy first. We use Numpy to generate data using its random module and create […]

Filed Under: Pandas 101

How to Convert to Best Data Types Automatically in Pandas?

April 13, 2020 by cmdlinetips

When you load your data as Pandas dataframe, Pandas automatically assigns a datatype to the variables/columns in the data frame. For example, typically the datatypes would beint, float and object datatypes. With the recent Pandas 1.0.0, we can make Pandas infer the best datatypes for the variables in a dataframe. We will use Pandas’ convert_dtypes() […]

Filed Under: Pandas 101

How to Select Numerical Columns from a Pandas Dataframe

April 7, 2020 by cmdlinetips

In this post, we will learn how to use Pandas to select columns based on their datatypes. For example, if we have Pandas dataframe with multiple data types, like numeric and object and we will learn how to select columns that are numeric. We can use Pandas’ seclect_dtypes() function and specify which data type to […]

Filed Under: Pandas 101 Tagged With: Pandas select_dtypes, Select Columns by Data Type, select numerical columns Pandas

How To Insert a Column at Specific Location in Pandas DataFrame?

April 1, 2020 by cmdlinetips

In this post, we will learn how to insert a column at specific location in a Pandas dataframe. We will use Pandas insert() function to insert column into DataFrame at a specified location with a specific name. Let us create a data frame using NumPy’s random module. Our data frame looks like this. We have […]

Filed Under: Pandas 101, Python Tips Tagged With: Insert a column in Pandas, pandas insert()

How To Get The Memory Usage of Pandas Dataframe?

March 31, 2020 by cmdlinetips

Getting to know how much memory used by a Pandas dataframe can be extremely useful when working with bigger dataframe. In this post we will see two examples of estimating memory usage of a Pandas dataframe using Pandas functionalities. We will first see how to find the total memory usage of Pandas dataframe using Pandas […]

Filed Under: Pandas 101

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