Python升级到2.7.11-演道网

python升级到2.7.11可解决 内置的 socket库的setdefaulttimeout方法和multiprocessing库的manage队列冲突的问题,在2.7.3版本是需要改源码才能解决。python 2.7.11,下载链接点击这里。问题如下

Traceback (most recent call last):
  File “/usr/local/lib/python2.7/multiprocessing/process.py”, line 232, in _bootstrap
    self.run()
  File “/usr/local/lib/python2.7/multiprocessing/process.py”, line 88, in run
    self._target(*self._args, **self._kwargs)
  File “agentInstaller.py”, line 445, in getInstallInfo
    lock.acquire()
  File “/usr/local/lib/python2.7/multiprocessing/managers.py”, line 960, in acquire
    return self._callmethod(‘acquire’, (blocking,))
  File “/usr/local/lib/python2.7/multiprocessing/managers.py”, line 729, in _callmethod
    self._connect()
  File “/usr/local/lib/python2.7/multiprocessing/managers.py”, line 716, in _connect
    conn = self._Client(self._token.address, authkey=self._authkey)
  File “/usr/local/lib/python2.7/multiprocessing/connection.py”, line 149, in Client
    answer_challenge(c, authkey)
  File “/usr/local/lib/python2.7/multiprocessing/connection.py”, line 383, in answer_challenge
    message = connection.recv_bytes(256)        # reject large message
IOError: [Errno 11] Resource temporarily unavailable

解决问题可以修改源代码文件 /usr/local/lib/python2.7/multiprocessing/connection.py

157    def Pipe(duplex=True):
158        ”’
159        Returns pair of connection objects at either end of a pipe
160        ”’
161        if duplex:
162            s1, s2 = socket.socketpair()
++163          s1.setblocking(True)                                                                                                                                                       
++164          s2.setblocking(True)
165            c1 = _multiprocessing.Connection(os.dup(s1.fileno()))
166            c2 = _multiprocessing.Connection(os.dup(s2.fileno()))
167            s1.close()
168            s2.close()
169        else:
170            fd1, fd2 = os.pipe()
171            c1 = _multiprocessing.Connection(fd1, writable=False)
172            c2 = _multiprocessing.Connection(fd2, readable=False)
173
174        return c1, c2

226    def __init__(self, address, family, backlog=1):
227        self._socket = socket.socket(getattr(socket, family))
228        self._socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
++229      self._socket.setblocking(True)                                                                                                                                                 
230        self._socket.bind(address)
231        self._socket.listen(backlog)
232        self._address = self._socket.getsockname()
233        self._family = family
234        self._last_accepted = None

243    def accept(self):
244        s, self._last_accepted = self._socket.accept()
++245      s.setblocking(True)                                                                                                                                                           
246        fd = duplicate(s.fileno())
247        conn = _multiprocessing.Connection(fd)
248        s.close()
249        return conn

257 def SocketClient(address):
258    ”’
259    Return a connection object connected to the socket given by `address`
260    ”’
261    family = address_type(address)
262    s = socket.socket( getattr(socket, family) )
++263  s.setblocking(True)                                                                                                                                                               
264    t = _init_timeout()

修改 /usr/local/lib/python2.7/test/test_multiprocessing.py

 assert sio.getvalue() == ‘foo’
2029
++2030 # Test interaction with socket timeouts – see Issue #6056
++ 2031 #
++ 2032
++ 2033 class TestTimeouts(unittest.TestCase):
++ 2034    @classmethod
++ 2035    def _test_timeout(cls, child, address):
++ 2036        time.sleep(1)
++ 2037        child.send(123)
++ 2038        child.close()
++ 2039        conn = multiprocessing.connection.Client(address)
++ 2040        conn.send(456)
++ 2041        conn.close()
++ 2042
++ 2043    def test_timeout(self):
++ 2044        old_timeout = socket.getdefaulttimeout()
++ 2045        try:
++ 2046            socket.setdefaulttimeout(0.1)
++ 2047            parent, child = multiprocessing.Pipe(duplex=True)
++ 2048            l = multiprocessing.connection.Listener(family=’AF_INET’)
++ 2049            p = multiprocessing.Process(target=self._test_timeout,
++ 2050                                        args=(child, l.address))
++ 2051            p.start()
++ 2052            child.close()
++ 2053            self.assertEqual(parent.recv(), 123)
++ 2054            parent.close()
++ 2055            conn = l.accept()
++ 2056            self.assertEqual(conn.recv(), 456)
++ 2057            conn.close()
++ 2058            l.close()
++ 2059            p.join(10)
++ 2060        finally:
++ 2061            socket.setdefaulttimeout(old_timeout)
++ 2062
++ 2063
++ 2064 testcases_other = [OtherTest, TestInvalidHandle, TestInitializers,
–2065 #-                  TestStdinBadfiledescriptor]
++ 2066                  TestStdinBadfiledescriptor, TestTimeouts]

升级2.7.11的其他好处就去看官网描述吧。安装过程如下:

curl -k https://www.python.org/ftp/python/2.7.11/Python-2.7.11.tgz -o python-2.7.11.tgz

yum -y install gcc gcc-c++ autoconf

yum -y install ncurses ncurses-devel

yum -y install mysql-devel

tar xf Python-2.7.11.tgz
cd Python-2.7.11/
./configure
make -j4 && make install

升级完重新打开secureCRT窗口

[root@master ~]# python
Python 2.7.11 (default, Nov  4 2016, 14:13:05)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux2
Type “help”, “copyright”, “credits” or “license” for more information.
>>>

安装readline

yum -y install readline-devel
yum -y install patch
yum -y  install gcc python-devel zlib-devel openssl-devel libffi-devel

easy_install readline

安装MySQLdb

tar zxf MySQL-python-1.2.3.tar.gz
cd MySQL-python-1.2.3
python setup.py build
python setup.py install

如果出现下面问题

>>> import MySQLdb
/usr/local/lib/python2.7/site-packages/MySQL_python-1.2.3-py2.7-linux-x86_64.egg/_mysql.py:3: UserWarning: Module _mysql was already imported from /usr/local/lib/python2.7/site-packages/MySQL_python-1.2.3-py2.7-linux-x86_64.egg/_mysql.pyc, but /home/opd/tmpFiles/singleExec/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.linux-x86_64/egg/_mysql.py”, line 7, in
  File “build/bdist.linux-x86_64/egg/_mysql.py”, line 6, in __bootstrap__
ImportError: libmysqlclient.so.20: cannot open shared object file: No such file or directory
>>>

解决方法如下

# 根据最后提示,应该是找不着一个交libmysqlclient.so.18的文件,于是到mysql安装目录里找到这个文件并且做一个软连接到/usr/lib
ln -s /usr/local/mysql/lib/libmysqlclient.so.20 /usr/lib64/libmysqlclient.so.20
# 如果是64系统则:
ln -s /usr/local/mysql/lib/libmysqlclient.so.20 /usr/lib64/libmysqlclient.so.20

零基础如何入门Python http://www.linuxidc.com/Linux/2016-10/136485.htm

Ubuntu 14.04安装Python 3.3.5  http://www.linuxidc.com/Linux/2014-05/101481.htm

CentOS上源码安装Python3.4  http://www.linuxidc.com/Linux/2015-01/111870.htm

《Python核心编程 第二版》.(Wesley J. Chun ).[高清PDF中文版] http://www.linuxidc.com/Linux/2013-06/85425.htm

《Python开发技术详解》.( 周伟,宗杰).[高清PDF扫描版+随书视频+代码] http://www.linuxidc.com/Linux/2013-11/92693.htm

在CentOS 6.5上安装Python2.7  http://www.linuxidc.com/Linux/2016-10/136206.htm

在Ubuntu下用Python搭建桌面算法交易研究环境 http://www.linuxidc.com/Linux/2013-11/92534.htm

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