python用sort求平均值,列表存放了10个整数,分别代表10个评委的评分,编...答:!/usr/bin/python3 arr = [36, 49, 64, 81, 100, 66, 78, 94, 57, 96]print("排序前%s" % arr)arr.sort()print("排序后%s" % arr)temp = 0 for a in arr:temp = temp + a print("平均分是:%.2f" % (temp/len(arr)))...
如何使用python来对二维数组进行复合排序答:import numpy as np data = np.array([[1,2,3,4,5], [1,2,3,6,7], [2,3,4,5,7], [3,4,5,6,7], [4,5,6,7,8]])idex=np.lexsort([-1*data[:,2], data[:,1], data[:,0]])先按第一列升序,再按第二列升序,再按第三列降序 注意先按后边的关键词排序 sorted_...
各位大神,用python对数据库中的某列数据排序怎么搞???不是用sql来排序...答:通过例子来说明sorted的用法: 1. 对由tuple组成的List排序 Python代码 >>> students = [('john', 'A', 15), ('jane', 'B', 12), ('dave', 'B', 10),] 用key函数排序(lambda的用法见 注释1) Python代码 >>> sorted(students, key=lambda student : student[2]) # sort ...
如何使用python来对二维数组进行复合排序?答:例子import numpy as npdata = np.array([[1,2,3,4,5], [1,2,3,6,7], [2,3,4,5,7], [3,4,5,6,7], [4,5,6,7,8]])sorted_cols = []for col_no in range(data.shape[1]): sorted_cols.append(data[np.argsort(data[:,col_no])][...