在Linux 系统下安装有多个python版本时，运行python报如下错误。

[vfy_xp@login_a09 ~]$ python
Fatal Python error: init_import_size: Failed to import the site module
Python runtime state: initialized
Traceback (most recent call last):
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/site.py", line 541, in <module>
    main()
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/site.py", line 522, in main
    known_paths = addusersitepackages(known_paths)
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/site.py", line 282, in addusersitepackages
    user_site = getusersitepackages()
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/site.py", line 258, in getusersitepackages
    user_base = getuserbase() # this will also set USER_BASE
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/site.py", line 248, in getuserbase
    USER_BASE = get_config_var('userbase')
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/sysconfig.py", line 659, in get_config_var
    return get_config_vars().get(name)
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/sysconfig.py", line 633, in get_config_vars
    conda_customize_compiler(_CONFIG_VARS)
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/sysconfig.py", line 528, in conda_customize_compiler
    from _osx_support import _find_executable
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/_osx_support.py", line 4, in <module>
    import re
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/re.py", line 123, in <module>
    import sre_compile
  File "/g1/app/apps/python/3.6.3/gnu/lib/python3.6/sre_compile.py", line 17, in <module>
    assert _sre.MAGIC == MAGIC, "SRE module mismatch"
AssertionError: SRE module mismatch

在 .bashrc 设置了module load apps/python/3.6.3/gnu，报存后 source .bashrc ，但运行python 时仍然报同样错误。 解决方案是

vi .bash_profile

在文件末尾添加

export PYTHON_HOME=/g1/app/apps/python/3.6.3/gnu/
export PATH=$PYTHON_HOME/bin:$PATH

报存后 source .bash_profile

重新运行python 问题解决。