cartesian product in pandas

Question

I have two pandas dataframes:

from pandas import DataFrame
df1 = DataFrame({\'col1\':[1,2],\'col2\':[3,4]})
df2 = DataFrame({\'col3\':[5,6]})     
         


        

Answer 1

With method chaining:

product = (
    df1.assign(key=1)
    .merge(df2.assign(key=1), on="key")
    .drop("key", axis=1)
)