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  • python list示例

     1 grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]
     2 
     3 def print_grades(grades_input):
     4   for grade in grades_input:
     5     print grade
     6 print_grades(grades)
     7 def grades_sum(scores):
     8   total = 0
     9   for score in scores: 
    10     total += score
    11   return total
    12 print grades_sum(grades)
    13 def grades_average(grades_input):
    14   sum_of_grades = grades_sum(grades_input)
    15   average = sum_of_grades / float(len(grades_input))
    16   return average
    17 print grades_average(grades)
    18 def grades_variance(scores):
    19   average=grades_average(scores)
    20   variance=0
    21   for score in scores:
    22     variance+=(average-score)**2
    23   return variance/float(len(scores))
    24 
    25 print grades_variance(grades)
    26 
    27 def grades_std_deviation(variance):
    28   return variance**0.5
    29 
    30 variance=grades_variance(grades)
    31 
    32 print grades_std_deviation(variance)
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  • 原文地址:https://www.cnblogs.com/stringAdmin/p/7719515.html
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