ScalaBoy questions

• How to transform rows into columns for my case?
• Error: mysql57-community-release conflicts with mysql-community-release-el7-7.noarch
• How to select multiple columns of dataset, given a list of column names?
• ValueError: index must be monotonic when applying rolling("2H").mean()
• How to add suffix to column names except some columns?
• Pandas and scikit-learn: KeyError: [....] not in index
• How to solve CORS problem of my Django API?
• How to check the schema of DataFrame?

ScalaBoy answers