Join through expression variable as on condition in databricks using PySpark

 Lets see how to join 2 table with a parameterized on condition in PySpark

Eg: I have 2 dataframes A and B and I want to join them with id,inv_no,item and subitem

onExpr = [(A.id == B.id) &

                    (A.invc_no == B.invc_no) & 
                    (A.item == B.item) & 
                    (A.subItem == B.subItem)] 

 dailySaleDF = A.join(B, onExpr, 'left').select([c for c in df.columns])