# Introduction In this lab, we will learn how to use the `combine_first()` method in the Pandas DataFrame. This method allows us to combine two DataFrame objects by filling null values in one DataFrame with non-null values from another DataFrame. It can be useful when we have missing data in one DataFrame and want to fill it with data from another DataFrame. ## VM Tips After the VM startup is done, click the top left corner to switch to the **Notebook** tab to access Jupyter Notebook for practice. Sometimes, you may need to wait a few seconds for Jupyter Notebook to finish loading. The validation of operations cannot be automated because of limitations in Jupyter Notebook. If you face issues during learning, feel free to ask Labby. Provide feedback after the session, and we will promptly resolve the problem for you.
Click the virtual machine below to start practicing