Filtering Rows in a Pandas DataFrame Based on Conditions and Using the Shift Function

Using Selenium and Pandas to Automate Exporting Google Colab Output to Excel Files

Removing Middle Initials from Name Strings in Python Using Regular Expressions

Replacing Part of a String in a Column by Position Using Pandas in Python

To calculate the sum of sales for each salesman in a month before their training date, we need to group by "salesman" and "transaction_month", then apply the aggregation function `sum` to the 'sales' column.

Understanding the Problem with Parsing Nested XML Files Using Python and lxml Library

Formatting String Digits in Python Pandas for Better Data Readability and Performance

Optimizing Pandas DataFrames for Speed: A Comparative Analysis of Vectorization and Multiprocessing

Parsing JSON-Like Strings with Python's ast Module: A Safe Alternative to json.loads()

Iterating Over Multiple Columns and Replacing Values with Null After a Specified Increment in Pandas DataFrames