## I want to create a bus schedule for a given time table. I have used PULP for the optimization problem (MIP). But I get multiple errors and I need some help with the entire code for scheduling. I also want to make spans and show the results.

### engineering

##### Description

I want to create a bus schedule for a given time table. I have used PULP for the optimization problem (MIP). But I get multiple errors and I need some help with the entire code for scheduling. I also want to make spans and show the results.

Error 1: '<=' not supported between instances of 'list' and 'int'

===My Code===

from mip.model import *

from itertools import product

from mip import Model, xsum, BINARY

model = Model()

(S, T) = (range(len(data)), range(max(data["bi"])))

Y = [model.add_var(name='Y({})'.format(i), var_type=BINARY)for i in S]

E = [model.add_var(name='E({})'.format(i), var_type=CONTINUOUS)for i in S]

C1=0.0662

d=2

C2=2

C3=0.5

R=180

l=26

Th=7

B=150

Emin=30

model.objective = minimize(xsum([Y[i]]*int((C1*d)+C2+(C3*R)) for i in S))

for i in S:

model+=[E[i]+[((Th*R)-d)*Y[i]]]<=B

model+=[E[i]+[((Th*R)-d)*Y[i]]-l]==E[i+1]

model+=E[i]>=Emin

model+=Y[i]=={0,1}

model+=E[1]==B

model.optimize()

print("Schedule: ")

for i in range(S):

print('({})'.format(i))

print('Makespan = {}'.format(model.objective_value))