How to add column to dataframe pandas

- How to add empty column to dataframe pandas
- How to add column names to pandas dataframe
- How to add new column to pandas dataframe with default value
- How to add id column to pandas dataframe
- How to add another column to pandas dataframe
- How to add index column to pandas dataframe
- How to add date column to pandas dataframe
- How to add column to beginning of dataframe pandas
- How to add a calculated column to pandas dataframe
- How to add new column to existing pandas dataframe
- Add column to dataframe pandas with default value
- Add column to dataframe pandas based on other columns
- Add column to dataframe pandas with same value
- Add column to dataframe pandas based on condition
- Add column to dataframe pandas from list