Merge branch 'python-selenium' of https://github.com/realpython/materials into python-selenium

Author: martin-martin

pandas-reset-index/Main_Code.ipynb

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+# How to Reset a pandas DataFrame Index
+
+These are the download files you can use with the Real Python tutorial [How to Reset a pandas DataFrame Index](https://realpython.com/how-to-pandas-reset-index-dataframe/):
+
+- `Main_Code.ipynb` contains the main code from the tutorial.
+- `Solutions.ipynb` contains sample solutions to the various exercises.
+- `band_members`, `cereals.csv`, `week1_record_sales.csv`, and `week2_record_sales.csv`, each contain source data used in the tutorial.