在OSX上使用MySQLdb时出现问题：找不到符号 _mysql_affected_rows
这和之前的一个问题有关。
不过，那里的主要解决方案对我来说不管用。我在使用Snow Leopard系统，安装的是32位的5.1.49版本的MySQL dmg文件。我在用内置的python（显然，正如评论中提到的，我的Python版本不同），看起来是32位的2.6.5版本：
Python 2.6.5 (r265:79359, Mar 24 2010, 01:32:55) [GCC 4.0.1 (Apple Inc. build 5493)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import sys >>> sys.maxint 2147483647
我从常用的地方下载了MySQL-python 1.2.3，并修改了site.cfg文件，让mysql_config指向正确的位置，同时把registry_key这一行注释掉。这个包似乎可以正常构建和安装：
caywork:MySQL-python-1.2.3 carl$ python setup.py clean running clean caywork:MySQL-python-1.2.3 carl$ python setup.py build running build running build_py copying MySQLdb/release.py -> build/lib.macosx-10.3-fat-2.6/MySQLdb running build_ext caywork:MySQL-python-1.2.3 carl$ sudo python setup.py install running install running bdist_egg running egg_info writing MySQL_python.egg-info/PKG-INFO writing top-level names to MySQL_python.egg-info/top_level.txt writing dependency_links to MySQL_python.egg-info/dependency_links.txt reading manifest file 'MySQL_python.egg-info/SOURCES.txt' reading manifest template 'MANIFEST.in' warning: no files found matching 'MANIFEST' warning: no files found matching 'ChangeLog' warning: no files found matching 'GPL' writing manifest file 'MySQL_python.egg-info/SOURCES.txt' installing library code to build/bdist.macosx-10.3-fat/egg running install_lib running build_py copying MySQLdb/release.py -> build/lib.macosx-10.3-fat-2.6/MySQLdb running build_ext creating build/bdist.macosx-10.3-fat/egg copying build/lib.macosx-10.3-fat-2.6/_mysql.so -> build/bdist.macosx-10.3-fat/egg copying build/lib.macosx-10.3-fat-2.6/_mysql_exceptions.py -> build/bdist.macosx-10.3-fat/egg creating build/bdist.macosx-10.3-fat/egg/MySQLdb copying build/lib.macosx-10.3-fat-2.6/MySQLdb/__init__.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb copying build/lib.macosx-10.3-fat-2.6/MySQLdb/connections.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb creating build/bdist.macosx-10.3-fat/egg/MySQLdb/constants copying build/lib.macosx-10.3-fat-2.6/MySQLdb/constants/__init__.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb/constants copying build/lib.macosx-10.3-fat-2.6/MySQLdb/constants/CLIENT.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb/constants copying build/lib.macosx-10.3-fat-2.6/MySQLdb/constants/CR.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb/constants copying build/lib.macosx-10.3-fat-2.6/MySQLdb/constants/ER.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb/constants copying build/lib.macosx-10.3-fat-2.6/MySQLdb/constants/FIELD_TYPE.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb/constants copying build/lib.macosx-10.3-fat-2.6/MySQLdb/constants/FLAG.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb/constants copying build/lib.macosx-10.3-fat-2.6/MySQLdb/constants/REFRESH.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb/constants copying build/lib.macosx-10.3-fat-2.6/MySQLdb/converters.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb copying build/lib.macosx-10.3-fat-2.6/MySQLdb/cursors.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb copying build/lib.macosx-10.3-fat-2.6/MySQLdb/release.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb copying build/lib.macosx-10.3-fat-2.6/MySQLdb/times.py -> build/bdist.macosx-10.3-fat/egg/MySQLdb byte-compiling build/bdist.macosx-10.3-fat/egg/_mysql_exceptions.py to _mysql_exceptions.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/__init__.py to __init__.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/connections.py to connections.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/constants/__init__.py to __init__.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/constants/CLIENT.py to CLIENT.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/constants/CR.py to CR.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/constants/ER.py to ER.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/constants/FIELD_TYPE.py to FIELD_TYPE.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/constants/FLAG.py to FLAG.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/constants/REFRESH.py to REFRESH.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/converters.py to converters.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/cursors.py to cursors.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/release.py to release.pyc byte-compiling build/bdist.macosx-10.3-fat/egg/MySQLdb/times.py to times.pyc creating stub loader for _mysql.so byte-compiling build/bdist.macosx-10.3-fat/egg/_mysql.py to _mysql.pyc creating build/bdist.macosx-10.3-fat/egg/EGG-INFO copying MySQL_python.egg-info/PKG-INFO -> build/bdist.macosx-10.3-fat/egg/EGG-INFO copying MySQL_python.egg-info/SOURCES.txt -> build/bdist.macosx-10.3-fat/egg/EGG-INFO copying MySQL_python.egg-info/dependency_links.txt -> build/bdist.macosx-10.3-fat/egg/EGG-INFO copying MySQL_python.egg-info/top_level.txt -> build/bdist.macosx-10.3-fat/egg/EGG-INFO writing build/bdist.macosx-10.3-fat/egg/EGG-INFO/native_libs.txt zip_safe flag not set; analyzing archive contents... creating 'dist/MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg' and adding 'build/bdist.macosx-10.3-fat/egg' to it removing 'build/bdist.macosx-10.3-fat/egg' (and everything under it) Processing MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg Removing /Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg Copying MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg to /Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages MySQL-python 1.2.3 is already the active version in easy-install.pth Installed /Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg Processing dependencies for MySQL-python==1.2.3 Finished processing dependencies for MySQL-python==1.2.3
但是当我尝试使用它时，却出现了这个错误：
caywork:MySQL-python-1.2.3 carl$ python -c "import MySQLdb"
/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg/_mysql.py:3: UserWarning: Module _mysql was already imported from /Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg/_mysql.pyc, but /Users/carl/Source/MySQL-python-1.2.3 is being added to sys.path
Traceback (most recent call last):
File "", line 1, in
File "MySQLdb/__init__.py", line 19, in
import _mysql
File "build/bdist.macosx-10.3-fat/egg/_mysql.py", line 7, in
File "build/bdist.macosx-10.3-fat/egg/_mysql.py", line 6, in __bootstrap__
ImportError: dlopen(/Users/carl/.python-eggs/MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg-tmp/_mysql.so, 2): Symbol not found: _mysql_affected_rows
Referenced from: /Users/carl/.python-eggs/MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg-tmp/_mysql.so
Expected in: dynamic lookup
我在网上找到的都是这个问题的旧例子，还有很多关于在OSX上让MySQL-python正常工作有多困难的抱怨。如果有人能帮忙，我将非常感激！！
1 个回答
0
我找到的唯一一个（虽然有点笨拙）能用的解决办法是使用 MySQL-python-1.2.2，然后应用了这个补丁。这个补丁是根据这里的一些建议拼凑出来的（http://www.mangoorange.com/2008/08/01/installing-python-mysqldb-122-on-mac-os-x/）和这里的建议（http://flo.nigsch.com/?p=62）。抱歉没有提供更多链接，因为我没有足够的积分来发布多个链接。