I have defined a function to calculate the number of tickets, in which it needs to check whether employee took a one-way ticket or two-way ticket. if one-way, tickets should multiply by 0.5 and for two-way, it should be 1.

this is my code,

def get_no_of_tickets_used(self,cr,uid,data) 

employee_id = data.get('employee_id',False)

tkts = 0

if employee_id:

tkts_obj=self.pool['od.airfare.encashments'].search(cr,uid,[('employee_id','=',employee_id),('state','!=','refused'),('one_way','=',True)])

tkts += len(tkts_obj * 0.5 

tkts_obj=self.pool['od.airfare.encashments'].search(cr,uid,[('employee_id','=',employee_id),('state','!=','refused'),('one_way','=',False)])

tkts += len(tkts_obj * 1)

return tkts

getting an error as

File "/home/shaffaf/Documents/Client_Projects/Pizza/orchid_addons/orchid_pizza/hr/wizard/provision_xls.py", line 375, in get_no_of_tickets_used

tkts += len(tkts_obj * 0.5)

TypeError: can't multiply sequence by non-int of type 'float'

how to fix this issue?