pip3抛出未定义的符号：XML_SetHashSalt

如何解决pip3抛出未定义的符号：XML_SetHashSalt

我在oracle Linux EL7上具有python 3.6.8 我使用

安装了pip3

yum install python36-pip

但是，当我调用pip3时，它出现库错误

pip3

Traceback (most recent call last):
  File "/bin/pip3",line 8,in <module>
    from pip import main
  File "/usr/lib/python3.6/site-packages/pip/__init__.py",line 42,in <module>
    from pip.utils import get_installed_distributions,get_prog
  File "/usr/lib/python3.6/site-packages/pip/utils/__init__.py",line 27,in <module>
    from pip._vendor import pkg_resources
  File "/usr/lib/python3.6/site-packages/pip/_vendor/pkg_resources/__init__.py",line 35,in <module>
    import plistlib
  File "/usr/lib64/python3.6/plistlib.py",line 65,in <module>
    from xml.parsers.expat import ParserCreate
  File "/usr/lib64/python3.6/xml/parsers/expat.py",line 4,in <module>
    from pyexpat import *
ImportError: /usr/lib64/python3.6/lib-dynload/pyexpat.cpython-36m-x86_64-linux-gnu.so: undefined symbol: XML_SetHashSalt

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
  File "/bin/pip3",line 12,in <module>
    from pip._internal import main
  File "/usr/lib/python3.6/site-packages/pip/__init__.py",in <module>
    from pyexpat import *
ImportError: /usr/lib64/python3.6/lib-dynload/pyexpat.cpython-36m-x86_64-linux-gnu.so: undefined 
symbol: XML_SetHashSalt

我试图查看pyexpat。*。so是否有其他选择，但似乎没有 下面最后一行的ldd是输出

[root@whf00jkd python3.6]# ldd  /usr/lib64/python3.6/lib-dynload/pyexpat.cpython-36m-x86_64-linux-gnu.so
        linux-vdso.so.1 =>  (0x00007ffd76bf9000)
        libexpat.so.1 => /scratch/oraofss/app/oraofss/product/18.0.0/client_1/lib/libexpat.so.1 (0x00007fec3a94a000)
        libpython3.6m.so.1.0 => /lib64/libpython3.6m.so.1.0 (0x00007fec3a422000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fec3a206000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fec39e38000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007fec39c34000)
        libutil.so.1 => /lib64/libutil.so.1 (0x00007fec39a31000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fec3972f000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fec3ad81000)

我搜索了libexpat.so.1

[root@whf00jkd python3.6]# whereis libexpat.so.1
libexpat.so: /usr/lib/libexpat.so.1 /usr/lib/libexpat.so /usr/lib64/libexpat.so.1 /usr/lib64/libexpat.so
[root@whf00jkd python3.6]# ls -ltr /usr/lib/libexpat.so.1
lrwxrwxrwx. 1 root root 17 Apr  1  2019 /usr/lib/libexpat.so.1 -> libexpat.so.1.6.0
[root@whf00jkd python3.6]# ls -ltr /usr/lib64/libexpat.so.1
lrwxrwxrwx. 1 root root 17 Apr  1  2019 /usr/lib64/libexpat.so.1 -> libexpat.so.1.6.0

并添加了一个链接libexpat.so.1-> /usr/lib/libexpat.so.1 在/usr/lib64/python3.6/lib-dynload/中，但这不能消除错误

请帮助

解决方法

libexpat.so.1指向错误的位置修复了 导出LD_LIBRARY_PATH = / lib64 /：$ PATH

ldd /usr/lib64/python3.6/lib-dynload/pyexpat.cpython-36m-x86_64-linux-gnu.so
        linux-vdso.so.1 =>  (0x00007fff073f1000)
        libexpat.so.1 => /lib64/libexpat.so.1 (0x00007f9ba53ce000)
        libpython3.6m.so.1.0 => /lib64/libpython3.6m.so.1.0 (0x00007f9ba4ea9000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f9ba4c8d000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f9ba48bf000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f9ba46bb000)
        libutil.so.1 => /lib64/libutil.so.1 (0x00007f9ba44b8000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f9ba41b6000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f9ba5807000)

,

这就是为我解决问题的原因。我使用的是 Python 3.6，并尝试使用 PIP 安装模块。我收到以下错误。

导入错误：/opt/rh/rh-python36/root/usr/lib64/python3.6/lib-dynload/pyexpat.cpython-36m-x86_64-linux-gnu.so：未定义符号：XML_SetHashSalt

提供 ldd 后跟查找映射的路径。

ldd /opt/rh/rh-python36/root/usr/lib64/python3.6/lib-dynload/pyexpat.cpython-36m-x86_64-linux-gnu.so

检查 - libexpat.so.1 的映射。就我而言，它指的是不正确的 oracle 路径 -- /u01/oracle/product/12.1.0.2/lib/libexpat.so.1

所以我把上面目录下的libexpat.so.1重命名了

重命名后，再次给ldd，它应该指向/lib64/libexpat.so.1

一旦映射得到纠正，我就可以进行 pip install。

感谢大家的帮助。

对我有帮助的链接：

https://ubuntuforums.org/showthread.php?t=2094005

https://askubuntu.com/questions/546654/python-error-when-opening-software-center

,

我遇到了完全相同的错误。

系统信息

• 带有 CentOS 7.9 的虚拟机
• Python 3.6

解决方案

我们安装了另一个软件，它带有自己的 libexpat 版本。我们还修改了环境变量 LD_LIBRARY_PATH 以包含该软件的 lib 目录。这导致 pip 加载错误的库。

在取消设置 LD_LIBRARY_PATH/从 LD_LIBRARY_PATH 中删除软件后，一切都很好。

,

您是如何安装Python 3的？在我的Oracle Linux 7安装中，我从yum.oracle.com上的ol7_latest安装了python3：

$ yum info python3
Installed Packages
Name        : python3
Arch        : x86_64
Version     : 3.6.8
Release     : 13.0.1.el7
Size        : 39 k
Repo        : installed
From repo   : ol7_latest

未安装 python36-pip，pip3可以正常工作，例如：

$ pip3 install --user cx_Oracle
Collecting cx_Oracle
  Using cached https://files.pythonhosted.org/packages/16/1d/36ecde56e0522f1a1cea7b4d4333f88b1062e0c5287fc67f522ceacc053c/cx_Oracle-8.0.0-cp36-cp36m-manylinux1_x86_64.whl
Installing collected packages: cx-Oracle
Successfully installed cx-Oracle-8.0.0