--

Python

Python 37

Python 39

Python 38

[Python 100] Python 100

3*3

fora[i][i]

#!/usr/bin/python # -*- coding: UTF-8 -*- if __name__ == '__main__': a = [] sum = 0.0 for i in range(3): a.append([]) for j in range(3): a[i].append(float(input("input num:\n"))) for i in range(3): sum += a[i][i] print (sum)

input num:
78
input num:
34
input num:
23
input num:
34
input num:
56
input num:
33
input num:
12
input num:
21
input num:
2
136.0

[Python 100] Python 100

AI ...

Python 37

Python 39

4

# coding: utf-8
"""
    1  2  3
    4  5  6 
    7  8  9
"""
matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
sum_ = 0
for i in range(0, 3):
    sum_ += matrix[i][i]
print sum_

9 (2017-05-17)

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import numpy as np

a=np.random.randint(1,100,9).reshape(3,3)
print(a)
(m,n)=np.shape(a)
sum=0
for i in range(m):
    for j in range(n):
        if i==j:
            sum+=a[i,j]
print(sum)

9 (2017-07-27)

# encoding:utf-8
import re
stopword = ''
str = ''
num = []
result = 0
print 'n:\n' \
        ' 11 12 13\n' \
        '      21 22 23\n' \
        '      31 32 33\n'
for line in iter(raw_input, stopword):#
    str = str + line + '\n'
row = len(re.findall(r'\n', str))
for x in re.finditer(r'\d+', str):#num
    num.append(int(x.group()))
i = 0
for j in range(row):#
    result += num[i]
    i = i + row + 1
print ':',result

chengxuyuan9 (2017-08-18)

Python2.x Python3.x

A = {}
for i in range(3):
    for j in range(3):
        A[i,j] = int(input('Enter a number:'))
diag = []
for m in A.keys():
    if m[0] == m[1]:
        diag.append(A[m])
print(sum(diag))

haruka_119 (2017-12-09)