报错解决：ImportError: /usr/lib64/libstdc++.so.6: version GLIBCXX_3.4.20 not found

问题描述

使用LAC（https://github.com/baidu/lac/blob/master/README.md）时，使用如下指令安装lac：

pip install lac

执行如下代码：

from LAC import LAC

报错：

Error: Can not import paddle core while this file exists: /root/miniconda3/envs/root/lib/python3.8/site-packages/paddle/fluid/libpaddle.so
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/root/miniconda3/envs/root/lib/python3.8/site-packages/LAC/__init__.py", line 23, in <module>
    from .lac import LAC
  File "/root/miniconda3/envs/root/lib/python3.8/site-packages/LAC/lac.py", line 28, in <module>
    import paddle.fluid as fluid
  File "/root/miniconda3/envs/root/lib/python3.8/site-packages/paddle/__init__.py", line 31, in <module>
    from .framework import monkey_patch_variable
  File "/root/miniconda3/envs/root/lib/python3.8/site-packages/paddle/framework/__init__.py", line 17, in <module>
    from . import random  # noqa: F401
  File "/root/miniconda3/envs/root/lib/python3.8/site-packages/paddle/framework/random.py", line 17, in <module>
    from paddle import fluid
  File "/root/miniconda3/envs/root/lib/python3.8/site-packages/paddle/fluid/__init__.py", line 36, in <module>
    from . import framework
  File "/root/miniconda3/envs/root/lib/python3.8/site-packages/paddle/fluid/framework.py", line 35, in <module>
    from . import core
  File "/root/miniconda3/envs/root/lib/python3.8/site-packages/paddle/fluid/core.py", line 356, in <module>
    raise e
  File "/root/miniconda3/envs/root/lib/python3.8/site-packages/paddle/fluid/core.py", line 269, in <module>
    from . import libpaddle
ImportError: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /root/miniconda3/envs/root/lib/python3.8/site-packages/paddle/fluid/libpaddle.so)

解决方法

该报错的原因为Pytorch与LAC冲突。只需要先import LAC，后import torch，即可解决该问题。

这里做一个测试，在python脚本中直接先导入LAC、后导入torch，不报错：

在python脚本中直接先导入torch、后导入LAC，报错：