Question

我正在尝试一个教程代码，它从网站上获取html代码并打印出来。我在ubuntu上使用python 3.4.0。代码：

import urllib.request
page = urllib.request.urlopen("http://www.brainjar.com/java/host/test.html")
text = page.read().decode("utf8")
print(text)

我看到以前的解决方案并尝试过它们，我也尝试仅导入urllib，但它仍然无效。显示的错误消息如下所示：

Traceback (most recent call last):
File "string.py", line 1, in <module>
import urllib.request
File "/usr/lib/python3.4/urllib/request.py", line 88, in <module>
import http.client
File "/usr/lib/python3.4/http/client.py", line 69, in <module>
import email.parser
File "/usr/lib/python3.4/email/parser.py", line 12, in <module>
from email.feedparser import FeedParser, BytesFeedParser
File "/usr/lib/python3.4/email/feedparser.py", line 27, in <module>
from email import message
File "/usr/lib/python3.4/email/message.py", line 15, in <module>
from email import utils
File "/usr/lib/python3.4/email/utils.py", line 40, in <module>
from email.charset import Charset
File "/usr/lib/python3.4/email/charset.py", line 15, in <module>
import email.quoprimime
File "/usr/lib/python3.4/email/quoprimime.py", line 44, in <module>
from string import ascii_letters, digits, hexdigits
File "/media/saiwal/D89602199601F930/Documents/Copy/codes/python/headfirst/string.py", line 2, in <module>
page = urllib.request.urlopen("http://www.brainjar.com/java/host/test.html")
AttributeError: 'module' object has no attribute 'request'
Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in apport_excepthook
from apport.fileutils import likely_packaged, get_recent_crashes
File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>
from apport.report import Report
File "/usr/lib/python3/dist-packages/apport/report.py", line 21, in <module>
from urllib.request import urlopen
File "/usr/lib/python3.4/urllib/request.py", line 88, in <module>
import http.client
File "/usr/lib/python3.4/http/client.py", line 69, in <module>
import email.parser
File "/usr/lib/python3.4/email/parser.py", line 12, in <module>
from email.feedparser import FeedParser, BytesFeedParser
File "/usr/lib/python3.4/email/feedparser.py", line 27, in <module>
from email import message
File "/usr/lib/python3.4/email/message.py", line 15, in <module>
from email import utils
File "/usr/lib/python3.4/email/utils.py", line 40, in <module>
from email.charset import Charset
File "/usr/lib/python3.4/email/charset.py", line 15, in <module>
import email.quoprimime
File "/usr/lib/python3.4/email/quoprimime.py", line 44, in <module>
from string import ascii_letters, digits, hexdigits
File "/media/saiwal/D89602199601F930/Documents/Copy/codes/python/headfirst/string.py", line 2, in <module>
page = urllib.request.urlopen("http://www.brainjar.com/java/host/test.html")
AttributeError: 'module' object has no attribute 'request'

Original exception was:
Traceback (most recent call last):
File "string.py", line 1, in <module>
import urllib.request
File "/usr/lib/python3.4/urllib/request.py", line 88, in <module>
import http.client
File "/usr/lib/python3.4/http/client.py", line 69, in <module>
import email.parser
File "/usr/lib/python3.4/email/parser.py", line 12, in <module>
from email.feedparser import FeedParser, BytesFeedParser
File "/usr/lib/python3.4/email/feedparser.py", line 27, in <module>
from email import message
File "/usr/lib/python3.4/email/message.py", line 15, in <module>
from email import utils
File "/usr/lib/python3.4/email/utils.py", line 40, in <module>
from email.charset import Charset
File "/usr/lib/python3.4/email/charset.py", line 15, in <module>
import email.quoprimime
File "/usr/lib/python3.4/email/quoprimime.py", line 44, in <module>
from string import ascii_letters, digits, hexdigits
File "/media/saiwal/D89602199601F930/Documents/Copy/codes/python/headfirst/string.py", line 2, in <module>
page = urllib.request.urlopen("http://www.brainjar.com/java/host/test.html")
AttributeError: 'module' object has no attribute 'request'

Answer 1

这看起来像是一个令人讨厌的巧合。

TL; DR：不要将脚本命名为string.py。

那么这里发生了什么？

您正尝试导入urllib.request。
urllib.request尝试导入http.client，尝试导入email.parser，尝试导入email.feedparser，尝试导入email.message，尝试导入email.utils，尝试导入email.charset，尝试导入email.quoprimime。
email.quoprimime尝试导入string，期望它为the standard Python string module - 但由于当前工作目录优先于标准Python库目录，因此会找到string.py string.py 1}}而是尝试导入它。
导入urllib.request时，您尝试导入urllib.request。由于仍会导入urllib，因此您仍然可以找回没有request属性的骨架string.py。
因为导入的request因为无法找到apt-get属性而失败，所以异常会重新开始传播。
但等等，还有更多！由于导入过程中出错，Ubuntu会通过查看您是否缺少dpkg包来尝试提供帮助。如果是这样，它可以说“嘿，看起来你错过了这个模块;想要urllib.request吗？“所以查找相应包的机制已经激活......
...但查找相应包本身的模块取决于string.py，因此它会尝试导入它，并再次失败...

简而言之，因为你选择{{1}}作为文件名，你覆盖了the standard string module，这打破了很多其他模块，甚至打破了你失踪时应该有用的模块一个模块，造成了很大的破坏。幸运的是，解决方案很简单：重命名脚本。

python urllib错误 - AttributeError：'module'对象没有属性'request'

1 个答案: