Question

我是一个绝对的初学者，我无法弄清楚为什么我的代码没有给出预期的结果。我想编写一个函数，计算给定字符串中大小写字母的数量。示例如下。

String：“你好，Rogers先生，你星期二过得怎么样？预期输出：

不。大写字母：4

不。小写字符：33

def up_low(s):
    upper_case_count = 0
    lower_case_count = 0

    split_s = s.split()

    for word in split_s:

        if word.islower() == False:
            upper_case_count +=1
            lower_case_count += len(word) - 1
        elif word.islower() == True:
            letter_count = len(word)
            lower_case_count += letter_count

    print(f'No. of Upper case characters is {upper_case_count}')
    print(f'No. of Lower case characters is {lower_case_count}')

如果运行在上一个示例中编写的函数，则得到4和36，而不是33。此外，我非常确定我编写的内容还是不正确的，因为仅当字符串中的单词具有只能有一个大写字母，但是我不知道如何解决这个问题，以便无论单词中有多少个大写字母都可以

Answer 1

分别用于小写和大写计数（字符串在a中）

sum(i.islower() for i in a)
sum(i.isupper() for i in a)

并感谢@Jean-FrançoisFabre使用map的建议。

sum(map(str.islower,a))
sum(map(str.isupper,a))

完整程序

print(f"The number of lower case characters is {sum(map(str.islower,a))}")
print(f"The number of upper case characters is {sum(map(str.isupper,a))}")

Answer 2

#!/usr/bin/env python3

def up_low(s):
    upper_case_count = 0
    lower_case_count = 0

    for letter in s:
        #If letter is uppercase, add 1 to upper count
        if letter.isupper():
            upper_case_count +=1

        #If letter is lowercase, add 1 to upper count
        if letter.islower() == True:
            lower_case_count +=1

        #All other characters, such as punctuation and questions, will be ignored.


    print('No. of Upper case characters is {}'.format(upper_case_count))
    print('No. of Upper case characters is {}'.format(lower_case_count))


s = 'Hello Mr. Rogers, how are you this fine Tuesday?'

up_low(s)

输出：

No. of Upper case characters is 4
No. of Upper case characters is 33

Answer 3

def up_low(s):
    upper_case_count = 0
    lower_case_count = 0

    for char in s:
        if char.isupper():
            upper_case_count += 1
        elif char.islower():
            lower_case_count += 1

    print(f'No. of Upper case characters is {upper_case_count}')
    print(f'No. of Lower case characters is {lower_case_count}')

Python函数可计算字符串中小写字母和大写字母的数量

3 个答案: