PandasdrillDrop rows missing a key field
A pandas exercise from Pandasdrill. Solve it with a Python editor in your browser running real pandas, and it is checked the moment you submit.
The task
Drop the contacts that have no email. Contacts without a phone number stay. Keep the original row labels.
What this exercise teaches
dropna() with no arguments drops a row if any column is missing, which would also remove contacts that only lack a phone. subset=["email"] checks just the email column.
A hint if you get stuck
dropna has a subset parameter that limits which columns are checked for missing values.
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