백준 2754 브론즈5 Python

score = input()
dict_score = {'A+': 4.3,
              'A0': 4.0,
              'A-': 3.7,

              'B+': 3.3,
              'B0': 3.0,
              'B-': 2.7,

              'C+': 2.3,
              'C0': 2.0,
              'C-': 1.7,
              
              'D+': 1.3,
              'D0': 1.0,
              'D-': 0.7,

              'F': 0.0
              }
print(dict_score[score])