9. Parsing and Extracting Data

Extract relevant information from complex data types such as strings or dates. Use string methods or regex (regular expressions).

Example: df['year'] = df['date'].dt.year
 
10. Combining Multiple Data Sources

Merge or concatenate multiple datasets to create a comprehensive dataset.

Use merge() or concat() in pandas.

 Example: df_combined = pd.merge(df1, df2, on='key_column')