Help in this code

Question

This is the last lesson of data structures course and when run i have two cases wrong (that are not shown ) the objective is print true or False if fhe input expression is parentheses equilibrated. this is my code:

def balanced(expression):
#tu código va aqu
par=[]
for i in expression:

if i== "(":
par.insert(0,"(")
elif i==")":
if par[0]=="(":
par.pop(0)
else:
return("False")
break

if par==[]:
return("True")

else:
return("False")

print(balanced(input()))

Answer 1

When list is empty and you encounter ')' from input then par[0]=='(' raise error because list is empty...