python二维数组中的每一组元素重复的次数怎么统计答:代码如下:coding=utf-8if __name__ == '__main__': a = [ [2,3,34,56], [14,23,45,6], [2,3,34,56] ] map = {} for item in a: s = str(item) if s in map.keys(): map[s] = map[s] + 1 else: map[s] = 1 for...
1.二维数组3X4求每列的平均值答:pythonCopy Code# 二维数组3x4array = [[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12]]# 记录每列元素的和col_sum = [0] * len(array[0])# 遍历累加每列元素for i in range(len(array)): for j in range(len(array[i])): col_sum[j] += array[i][j]# ...
python 二维数组如何对应相加急~~答:这个如果用numpy我不怎么熟,我觉得用pandas是常态- -,代码如下:import pandas as pd a = [[1,2,3,4],[1,2,3,4],[1,2,3,4],[1,2,3,4],[1,2,3,4]]b=pd.DataFrame(a)print(list(b.sum()))