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Python and pandas
Data Scientist
Python and pandas questions
10 questions on Python and pandas for data scientists, easiest first.
Easy
4
Counting missing values in pandas
easy
pandas mean with a missing value
easy
value_counts with normalize
easy
COUNT of a column with NULLs
easy
Medium
4
groupby with transform
medium
Row count after a merge
medium
groupby with a missing key
medium
NOT IN returns no rows
medium
Hard
2
Shape after NumPy broadcasting
hard
Rolling mean at the edges
hard
