Question

我正在尝试使用Centos 6.7根据mutalyzer 2.0.14说明在Anaconda Python 2.7上安装these。

我的安装很顺利，但是当我尝试运行py.test套件时，我遇到了一系列失败。

我怀疑操作系统与操作系统之间存在版本冲突。版本libmagic和python2.7包python-magic。

如果有人能够解释这里发生的事情或者更好地建议修复此问题，我会非常感兴趣。

我的libmagic安装：

$ rpm -qa | grep 'file-'
file-libs-5.04-21.el6.x86_64
file-5.04-21.el6.x86_64
file-devel-5.04-21.el6.x86_64

相应的Python包：

$ source activate  py27
discarding /opt/anaconda2/bin from PATH
prepending /opt/anaconda2/envs/py27/bin to PATH
(py27) $ pip list | grep magic 
Magic-file-extensions (0.2, /home/chris.guest/temp/mutalyzer/src/magic-file-extensions)
python-magic (0.4.10)

py.test就像这样开始：

# py.test
======================================================= test session starts =======================================================
platform linux2 -- Python 2.7.11, pytest-2.8.2, py-1.4.30, pluggy-0.3.1
rootdir: /home/chris.guest/temp/mutalyzer, inifile: 
collected 610 items / 3 errors 

tests/test_backtranslator.py ......
tests/test_base.py .
tests/test_crossmap.py .......................
tests/test_grammar.py ........................................................................................
tests/test_mapping.py ..............................
tests/test_migrations.py .
tests/test_mutator.py ................................................................................................................................................................
tests/test_ncbi.py ............................................................................................................
tests/test_parsers_genbank.py ..........

并且完成了很多错误。由于undefined symbol: magic_list：

，许多测试失败了

_________________________________________ ERROR at setup of test_batch_unicode[sqlite://] _________________________________________

    @pytest.fixture
    def website():
>       return create_app().test_client()

tests/test_website.py:29: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
mutalyzer/website/__init__.py:35: in create_app
    from mutalyzer.website.views import website
mutalyzer/website/views.py:26: in <module>
    from mutalyzer import (announce, backtranslator, File, Retriever, Scheduler,
mutalyzer/File.py:23: in <module>
    import magic           # open(), MAGIC_MIME, MAGIC_NONE
src/magic-file-extensions/magic.py:94: in <module>
    _list = _libraries['magic'].magic_list
/opt/anaconda2/envs/py27/lib/python2.7/ctypes/__init__.py:378: in __getattr__
    func = self.__getitem__(name)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <CDLL 'libmagic.so.1', handle 160cc50 at 7f23b97340d0>, name_or_ordinal = 'magic_list'

    def __getitem__(self, name_or_ordinal):
>       func = self._FuncPtr((name_or_ordinal, self))
E       AttributeError: /usr/lib64/libmagic.so.1: undefined symbol: magic_list

/opt/anaconda2/envs/py27/lib/python2.7/ctypes/__init__.py:383: AttributeError
______________________________________ ERROR at setup of test_batch_unicode_email[sqlite://] ______________________________________

    @pytest.fixture
    def website():
>       return create_app().test_client()

tests/test_website.py:29: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
mutalyzer/website/__init__.py:35: in create_app
    from mutalyzer.website.views import website
mutalyzer/website/views.py:26: in <module>
    from mutalyzer import (announce, backtranslator, File, Retriever, Scheduler,
mutalyzer/File.py:23: in <module>
    import magic           # open(), MAGIC_MIME, MAGIC_NONE
src/magic-file-extensions/magic.py:94: in <module>
    _list = _libraries['magic'].magic_list
/opt/anaconda2/envs/py27/lib/python2.7/ctypes/__init__.py:378: in __getattr__
    func = self.__getitem__(name)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <CDLL 'libmagic.so.1', handle 160cc50 at 7f23b984ef50>, name_or_ordinal = 'magic_list'

    def __getitem__(self, name_or_ordinal):
>       func = self._FuncPtr((name_or_ordinal, self))
E       AttributeError: /usr/lib64/libmagic.so.1: undefined symbol: magic_list

/opt/anaconda2/envs/py27/lib/python2.7/ctypes/__init__.py:383: AttributeError
============================================== 548 passed, 65 error in 41.42 seconds ==============================================
(py27)[root@localhost mutalyzer]#

Answer 1

我们有一个用户尝试在CentOS 6上安装Mutalyzer的早期报告，他们也遇到了libmagic的麻烦。除了转换到CentOS 7之外，我认为这个问题没有得到解决。

不幸的是，我们的资源非常有限，Debian是我们自己使用的唯一操作系统，这是我们可以实际支持的。当然，我们很乐意接受补丁或文档更新：）

感谢您使用Mutalyzer！

Answer 2

与Centos 6.7一起打包的magiclib版本缺少magic_list函数。

我能够将此补丁发送到src/magic-file-extensions/magic.py，以便py.test运行时没有错误。

$ diff -u src/magic-file-extensions/magic.old.py src/magic-file-extensions/magic.py
--- src/magic-file-extensions/magic.old.py  2015-12-31 14:04:50.769635453 +1100
+++ src/magic-file-extensions/magic.py  2016-01-11 15:17:49.987270845 +1100
@@ -91,9 +91,13 @@
 _check.restype = c_int
 _check.argtypes = [magic_t, c_char_p]

-_list = _libraries['magic'].magic_list
-_list.restype = c_int
-_list.argtypes = [magic_t, c_char_p]
+try:
+    _list = _libraries['magic'].magic_list
+    _list.restype = c_int
+    _list.argtypes = [magic_t, c_char_p]
+except AttributeError, e:
+    _list = None
+    

 _errno = _libraries['magic'].magic_errno
 _errno.restype = c_int

虽然使用此修补程序处理了直接AttributeError，但Magic.list中的src/magic-file-extensions/magic.py方法如果被调用仍然会失败。这不是一个直接的问题，因为它似乎没有在mutalyzer代码库中调用。

Mutalyzer py.test因python-magic错误而失败

2 个答案: