Python 逐字遍历字符串
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Iterating through a string word by word
提问by Mohit Bhasi
I wanted to know how to iterate through a string word by word.
我想知道如何逐字遍历字符串。
string = "this is a string"
for word in string:
print (word)
The above gives an output:
上面给出了一个输出：
t
h
i
s
i
s
a
s
t
r
i
n
g
吨
H
一世
秒
一世
秒
一种
秒
吨
r
一世
n
G
But I am looking for the following output:
但我正在寻找以下输出：
this
is
a
string
这个
是
一种
细绳
采纳答案by Anand S Kumar
When you do -
当你这样做时——
for word in string:
You are not iterating through the words in the string, you are iterating through the characters in the string. To iterate through the words, you would first need to split the string into words , using str.split(), and then iterate through that . Example -
您不是遍历字符串中的单词，而是遍历字符串中的字符。要遍历单词，您首先需要将字符串拆分为 words ，使用str.split()，然后遍历 that 。例子 -
my_string = "this is a string"
for word in my_string.split():
print (word)
Please note, str.split(), without passing any arguments splits by all whitespaces (space, multiple spaces, tab, newlines, etc).
请注意，str.split(), 不传递任何由所有空格（空格、多个空格、制表符、换行符等）分割的参数。
回答by Joe T. Boka
This is one way to do it:
这是一种方法：
string = "this is a string"
ssplit = string.split()
for word in ssplit:
print (word)
Output:
输出：
this
is
a
string
回答by Connor
for word in string.split():
print word
回答by no?????z???
Using nltk.
使用nltk。
from nltk.tokenize import sent_tokenize, word_tokenize
sentences = sent_tokenize("This is a string.")
words_in_each_sentence = word_tokenize(sentences)
You may use TweetTokenizerfor parsing casual text with emoticons and such.
您可以使用TweetTokenizer来解析带有表情符号等的随意文本。
回答by Nandu Software Engineer
s = 'hi how are you'
l = list(map(lambda x: x,s.split()))
print(l)
Output: ['hi', 'how', 'are', 'you']
输出： ['hi', 'how', 'are', 'you']
