Question

import re
sentence = 'horses are fast'
regex = re.compile('(?P<animal>\w+) (?P<verb>\w+) (?P<adjective>\w+)')
matched = re.search(regex, sentence)
print(matched.groupdict())

此代码段生成输出

{'形容词'：'快'，'动词'：'是'，'动物'：'马'}

两个问题。

一个模式如何匹配句子？匹配的对象还包含用于创建它的模式吗？

Answer 1

不，正则表达式只是定义搜索模式。对于词性标注，您需要更强大的功能，即NLTK library。

/opt/web/env/lib/python3.5/site-packages/django/urls/resolvers.py in url_patterns
            iter(patterns)
Local Vars

Variable    Value
msg       ("The included URLconf '{name}' does not appear to have any patterns in it. If "
 'you see valid patterns in the file then the issue is probably caused by a '
 'circular import.')
patterns    <module 'app_name.urls' from '/opt/web/app/my_site/app_name/urls.py'>
self    <URLResolver 'app_name.urls' (None:None) '^/'>

During handling of the above exception ('module' object is not iterable), another exception occurred:

/opt/web/env/lib/python3.5/site-packages/django/core/handlers/exception.py in inner
            response = get_response(request)
[SNIP]

/opt/web/env/lib/python3.5/site-packages/django/urls/base.py in resolve
    return get_resolver(urlconf).resolve(path)
Local Vars

Variable    Value
path      '/4567/details'
urlconf   'app_name.urls'

/opt/web/env/lib/python3.5/site-packages/django/urls/resolvers.py in resolve
            for pattern in self.url_patterns:
Local Vars

Variable    Value
args         ()
kwargs       {}
match        ('4567/details', (), {})
new_path     '4567/details'
path         '/4567/details'
self         <URLResolver 'app_name.urls' (None:None) '^/'>
tried        []

/opt/web/env/lib/python3.5/site-packages/django/utils/functional.py in __get__
        res = instance.__dict__[self.name] = self.func(instance)
Local Vars

Variable    Value
cls         <class 'django.urls.resolvers.URLResolver'>
instance    <URLResolver 'app_name.urls' (None:None) '^/'>
self        <django.utils.functional.cached_property object at 0x7f06c7d2c550>

/opt/web/env/lib/python3.5/site-packages/django/urls/resolvers.py in url_patterns
            raise ImproperlyConfigured(msg.format(name=self.urlconf_name))
Local Vars

Variable    Value
msg        ("The included URLconf '{name}' does not appear to have any patterns in it. If "
 'you see valid patterns in the file then the issue is probably caused by a '
 'circular import.')
patterns    <module 'app_name.urls' from '/opt/web/app/my_site/app_name/urls.py'>
self    <URLResolver 'app_name.urls' (None:None) '^/'>

所有这一行都按顺序捕获每个组，然后命名。 See here以及标题为＆＃34;非捕获和命名群组的下一部分＆＃34;

正则表达式是否理解形容词和动词是什么？

1 个答案: