s=" Python is beautiful!" print( s[0:7[].lower)的运行结果是什么
时间: 2024-03-20 13:43:16 浏览: 231
这段代码有语法错误,请修改为以下代码:
```
s = "Python is beautiful!"
print(s[0:7].lower())
```
运行结果为:
```
python
```
这是因为 `s[0:7]` 表示取字符串 `s` 的第0个到第6个字符(不包括第7个),即 `"Python "`,然后 `.lower()` 表示将这个字符串转化为小写字母,即 `"python "`。注意字符串末尾的空格也会被保留。
相关问题
编程实现:编程实现英文词频统计: 文件words.txt内容如下所示: Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex. Complex is better than complicated. 读取文件中内容,要求统计文件中英文单词的个数,输出单词及出现次数。
以下是Python代码实现:
```python
import re
# 读取文件内容
with open('words.txt', 'r') as f:
text = f.read()
# 将所有非字母字符替换为空格
text = re.sub(r'[^a-zA-Z]', ' ', text)
# 将所有单词转换为小写
text = text.lower()
# 将文本分割成单词列表
words = text.split()
# 统计单词出现次数
word_count = {}
for word in words:
if word in word_count:
word_count[word] += 1
else:
word_count[word] = 1
# 输出单词及出现次数
for word, count in word_count.items():
print(f'{word}: {count}')
```
运行结果:
```
beautiful: 1
is: 4
better: 4
than: 4
ugly: 1
explicit: 1
implicit: 1
simple: 1
complex: 2
complicated: 1
```
其中,`words.txt` 文件内容为:
```
Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex. Complex is better than complicated.
```
python用find找nihao,amigo,u are beautiful 中元音的位置
在Python中,你可以使用内置的`enumerate()`函数结合字符串的`index()`方法来找到特定单词(如'nihao', 'amigo', 'u are beautiful')中元音字母(即'a', 'e', 'i', 'o', 'u',在英文中还包括'y'作为元音)的位置。元音通常是不区分大小写的,所以我们可以先将整个字符串转为小写。
下面是一个例子:
```python
def find_vowels_in_words(words):
vowels = {'a', 'e', 'i', 'o', 'u', 'y'} # 英文元音集合
positions = {} # 存储每个单词元音位置的字典
for word in words.split(','):
word = word.lower() # 转换为小写
positions[word] = [i for i, char in enumerate(word) if char in vowels]
return positions
words = "nihao, amigo, u are beautiful"
result = find_vowels_in_words(words)
print(result)
```
运行这段代码会返回每个单词中元音字母的位置列表。注意,如果某个单词不含元音,它对应的键值对将是空列表。
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