[英]Using Regex in Python to find words with certain characters and without other characters
First off, I am new to regex and am using https://regex101.com/r/arkkVE/3 to help me learn it.首先,我是正则表达式的新手,我正在使用https://regex101.com/r/arkkVE/3来帮助我学习它。
I'd like to find words from a.txt file that I have using re.我想从我使用 re 的 a.txt 文件中查找单词。 So far I am able to do this, but it is very verbose and I am trying to cut back on repeated sequences of regex expressions.
到目前为止,我能够做到这一点,但它非常冗长,我正试图减少正则表达式的重复序列。
currently this is what I have目前这就是我所拥有的
Possibility = list()
with open('5LetterWords.txt') as f:
for line in f.readlines():
Possibility += re.findall(r'(?=\w)(?=.*[@#t])[\w]+(?=\w)(?=.*[@#o])[\w]+(?=\w)(?=.*[@#u])[\w]+'
, line)
print(Possibility)
This finds words that have the letters "t" and "o" and "u" in no particular order, which is the first step in what I want.这会找到没有特定顺序的字母“t”、“o”和“u”的单词,这是我想要的第一步。
I want to add additional regex expressions that will omit words that have other characters, but I don't know how to exclude using regex.我想添加其他正则表达式,这些表达式将省略具有其他字符的单词,但我不知道如何使用正则表达式进行排除。
As you can see this is starting to get really long and ugly.正如你所看到的,这开始变得非常长而且丑陋。
Should I be using regex?我应该使用正则表达式吗? Is there a better/more concise way to solve this problem?
有没有更好/更简洁的方法来解决这个问题?
Thanks谢谢
Ideally you would read the file line by line and check each word for the existence of t
, o
, and u
and additionally check that a
does not exist.理想情况下,您将逐行读取文件并检查每个单词是否存在
t
、 o
和u
并另外检查a
是否存在。
I'm not a Python dev but this seems relevant: https://stackoverflow.com/a/5189069/2191572我不是 Python 开发人员,但这似乎相关: https://stackoverflow.com/a/5189069/2191572
if ('t' in word) and ('o' in word) and ('u' in word) and ('a' not in word):
print('yay')
else:
print('nay')
If you insist on regex, then this would work:如果您坚持使用正则表达式,那么这将起作用:
^(?=.*t)(?=.*o)(?=.*u)(?!.*a).*$
^
- start line anchor ^
- 起始线锚点(?=.*t)
- ahead of me there exists a t
(?=.*t)
- 在我前面有一个t
(?=.*o)
- ahead of me there exists a o
(?=.*o)
- 在我前面有一个o
(?=.*u)
- ahead of me there exists a u
(?=.*u)
- 在我面前有一个u
(?..*a)
- ahead of me are no a
s (?..*a)
- 在我前面没有a
s.*
- capture everything .*
- 捕捉一切$
- end line anchor $
- 结束线锚Note: (?..*a).*
can be substituted with [^a]*
注意:
(?..*a).*
可以替换为[^a]*
https://regex101.com/r/WtVr8S/1 https://regex101.com/r/WtVr8S/1
I guess you could iterate through your list of words and filter out which word you want or don't want, for example我想您可以遍历您的单词列表并过滤掉您想要或不想要的单词,例如
words = ['about', 'alout', 'aotus', 'apout', 'artou', 'atour', 'blout', 'bottu', 'bouet', 'boult', 'bouto', 'bouts', 'chout', 'clout', 'count', 'court', 'couth', 'crout', 'donut', 'doubt', 'flout', 'fotui', 'fount', 'foute', 'fouth', 'fouty', 'glout', 'gouty', 'gouts', 'grout', 'hoult', 'yourt', 'youth', 'joust', 'keout', 'knout', 'lotus', 'louty', 'louts', 'montu', 'moult', 'mount', 'mouth', 'nobut', 'notum', 'notus', 'plout', 'pluto', 'potus', 'poult', 'pouty', 'pouts', 'roust', 'route', 'routh', 'routs', 'scout', 'shout', 'skout', 'smout', 'snout', 'south', 'spout', 'stoun', 'stoup', 'stour', 'stout', 'tatou', 'taupo', 'thous', 'throu', 'thuoc', 'todus', 'tofus', 'togue', 'tolus', 'tonus', 'topau', 'toque', 'torus', 'totum', 'touch', 'tough', 'tould', 'tourn', 'tours', 'tourt', 'touse', 'tousy', 'toust', 'touts', 'troue', 'trout', 'trouv', 'tsubo', 'voust']
result = []
for word in words:
if ('a' in word) or ('y' in word):
continue #to skip
elif ('t' in word) or ('u' in word) or ('o' in word):
result.append(word)
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