在Python 3.4 BeautifulSoup无效的语法（2to3.py后） [英] BeautifulSoup invalid syntax in Python 3.4 (after 2to3.py)

问题描述

我想在Python 3.4安装美味的汤4。我安装了它的命令行，（得到了无效的语法错误，因为我没有将它转换），跑了 2to3.py 转换脚本，以 BS4 ，现在我得到一个新的无效语法错误。

I am trying to install Beautiful Soup 4 in Python 3.4. I installed it from the command line, (got the invalid syntax error because I had not converted it), ran the 2to3.py conversion script to bs4 and now I get a new invalid syntax error.

>>> from bs4 import BeautifulSoup
Traceback (most recent call last):
File "<pyshell#0>", line 1, in <module>
    from bs4 import BeautifulSoup
  File "C:\Python34\bs4\__init__.py", line 30, in <module>
    from .builder import builder_registry, ParserRejectedMarkup
  File "C:\Python34\bs4\builder\__init__.py", line 4, in <module>
    from bs4.element import (
  File "C:\Python34\bs4\element.py", line 1213
    print 'Running CSS selector "%s"' % selector
                                    ^
SyntaxError: Missing parentheses in call to 'print'

任何想法？

推荐答案

BeautifulSoup 4确实的不可以需要手工转换为Python的3​​运行您尝试运行code仅与Python兼容2代替;看来你没有正确地转换codeBase的。

BeautifulSoup 4 does not need manual converting to run on Python 3. You are trying to run code only compatible with Python 2 instead; it appears you failed to correctly convert the codebase.

从 BeautifulSoup 4首页：

美丽的汤4作品在两个Python 2中（2.6+）和Python 3。

Beautiful Soup 4 works on both Python 2 (2.6+) and Python 3.

该行现在抛出异常的应的阅读：

The line now throwing the exception should read:

print('Running CSS selector "%s"' % selector)

在codeBase的不使用Python语法2，但 setup.py 安装程序将它转换为你的Python兼容3语法。请确保安装项目PIP ：

The codebase does use Python 2 syntax, but the setup.py installer converts this for you to compatible Python 3 syntax. Make sure to install the project with pip:

pip install beautifulsoup4

或使用 PIP 版本与Python 3.4捆绑：

or using the pip version bundled with Python 3.4:

python3.4 -m pip install beautifulsoup4

或使用的easy_install ：

easy_install beautifulsoup4

如果您刚刚下载的压缩包，的最起码的运行

If you downloaded just the tarball, at the very least run

python3.4 setup.py install

让安装程序正确地转换codeBase的你;转换后code是的复制到您的Python安装的。您可以在运行该命令后丢弃下载的源目录，请参见的安装工作原理的。

to have the installer correctly convert the codebase for you; the converted code is copied into your Python setup. You can discard the downloaded source directory after running the command, see How installation works.

另外，运行：

python3.4 setup.py build

和跨建立/ lib目录目录复制。同样，做的不可以使用原来的源目录，因为它是保持不变。

and copy across the build/lib directory. Again, do not use the original source directory as it is left untouched.

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