Utiliser l'opérateur dans Python List

list1 = [10, 20, 4, 45, 99]
 
mx=max(list1[0],list1[1])
secondmax=min(list1[0],list1[1])
n =len(list1)
for i in range(2,n):
    if list1[i]>mx:
        secondmax=mx
        mx=list1[i]
    elif list1[i]>secondmax and \
        mx != list1[i]:
        secondmax=list1[i]
 
print("Second highest number is : ",\
      str(secondmax))
      
 Output:-     
      
Second highest number is :  45
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