Pandas create new column based on two columns

- Pandas create new column based on two other columns
- Pandas create new column based on condition of two columns
- Pandas create new column from two columns
- Pandas create new column by concatenating two columns
- Pandas create new column by multiplying two columns
- Pandas create new column sum of two columns
- Pandas create new column based on comparing two columns
- Pandas create new column concatenate two columns
- Pandas create new column by adding two columns
- Pandas create new column by dividing two columns
- Pandas create new column by subtracting two columns