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python应用_统计数字问题,计算书的页码

2011-11-21 09:34 274 查看
问题描述:对给定页码n,计算出全部页码中分别用到多少次数字0,1,2,3,4...,9

第一次写的代码:

def count_num1(page_num):
num_zero = 0
num_one = 0
num_two = 0
num_three = 0
num_four = 0
num_five = 0
num_six = 0
num_seven = 0
num_eight = 0
num_nine = 0
page_list = range(1,page_num + 1)
for page in page_list:
page = str(page)
num_zero += page.count('0')
num_one += page.count('1')
num_two += page.count('2')
num_three += page.count('3')
num_four += page.count('4')
num_five += page.count('5')
num_six += page.count('6')
num_seven += page.count('7')
num_eight += page.count('8')
num_nine += page.count('9')
result = [num_zero,num_one,num_two,num_three,num_four,num_five,num_six,num_seven,num_eight,num_nine]
return result

print count_num1(13)


发现代码写得太挫了,出门都不好意思和人打招呼了 所以改了下代码..

改后的代码:

def count_num2(page_num):
page_list = range(1,page_num + 1)
result = [0 for i in range(10)]
for page in page_list:
page = str(page)
for i in range(10):
temp = page.count(str(i))
result[i]  += temp
return result


优美了很多..

输出结果:

[1, 6, 2, 2, 1, 1, 1, 1, 1, 1]
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