python2安装brian2

想用python2安装brian2 模块 结果一直报错
被困扰好多天了
求解答

```python
C:\Users\shiyan>python2 -m pip install brian2
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality.
Collecting brian2
  Using cached Brian2-2.3.0.2.tar.gz (1.6 MB)
Requirement already satisfied: numpy>=1.10 in c:\python27\lib\site-packages (from brian2) (1.16.6)
Collecting cython>=0.29
  Using cached Cython-0.29.32-py2.py3-none-any.whl (986 kB)
Collecting sympy>=1.2
  Using cached sympy-1.5.1-py2.py3-none-any.whl (5.6 MB)
Requirement already satisfied: pyparsing in c:\python27\lib\site-packages (from brian2) (2.4.7)
Collecting jinja2>=2.7
  Using cached Jinja2-2.11.3-py2.py3-none-any.whl (125 kB)
Requirement already satisfied: setuptools>=24 in c:\python27\lib\site-packages (from brian2) (39.0.1)
Collecting future
  Using cached future-0.18.2.tar.gz (829 kB)
Collecting py-cpuinfo
  Using cached py-cpuinfo-8.0.0.tar.gz (99 kB)
Collecting mpmath>=0.19
  Using cached mpmath-1.2.1.tar.gz (2.1 MB)
    ERROR: Command errored out with exit status 1:
     command: 'C:\Users\shiyan\AppData\Local\Programs\Python\Scripts\python2.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'c:\\users\\shiyan\\appdata\\local\\temp\\pip-install-qsgpzx\\mpmath\\setup.py'"'"'; __file__='"'"'c:\\users\\shiyan\\appdata\\local\\temp\\pip-install-qsgpzx\\mpmath\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'c:\users\shiyan\appdata\local\temp\pip-pip-egg-info-gtuiw2'
         cwd: c:\users\shiyan\appdata\local\temp\pip-install-qsgpzx\mpmath\
    Complete output (58 lines):
    C:\Python27\lib\site-packages\setuptools\pep425tags.py:89: RuntimeWarning: Config variable 'Py_DEBUG' is unset, Python ABI tag may be incorrect
      warn=(impl == 'cp')):
    C:\Python27\lib\site-packages\setuptools\pep425tags.py:93: RuntimeWarning: Config variable 'WITH_PYMALLOC' is unset, Python ABI tag may be incorrect
      warn=(impl == 'cp')):
    C:\Python27\lib\site-packages\setuptools\pep425tags.py:99: RuntimeWarning: Config variable 'Py_UNICODE_SIZE' is unset, Python ABI tag may be incorrect
      sys.version_info < (3, 3))) \
    Traceback (most recent call last):
      File "", line 1, in 
      File "c:\users\shiyan\appdata\local\temp\pip-install-qsgpzx\mpmath\setup.py", line 6, in 
        setuptools.setup(use_scm_version=True)
      File "C:\Python27\lib\site-packages\setuptools\__init__.py", line 128, in setup
        _install_setup_requires(attrs)
      File "C:\Python27\lib\site-packages\setuptools\__init__.py", line 123, in _install_setup_requires
        dist.fetch_build_eggs(dist.setup_requires)
      File "C:\Python27\lib\site-packages\setuptools\dist.py", line 513, in fetch_build_eggs
        replace_conflicting=True,
      File "C:\Python27\lib\site-packages\pkg_resources\__init__.py", line 774, in resolve
        replace_conflicting=replace_conflicting
      File "C:\Python27\lib\site-packages\pkg_resources\__init__.py", line 1057, in best_match
        return self.obtain(req, installer)
      File "C:\Python27\lib\site-packages\pkg_resources\__init__.py", line 1069, in obtain
        return installer(requirement)
      File "C:\Python27\lib\site-packages\setuptools\dist.py", line 580, in fetch_build_egg
        return cmd.easy_install(req)
      File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 673, in easy_install
        return self.install_item(spec, dist.location, tmpdir, deps)
      File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 699, in install_item
        dists = self.install_eggs(spec, download, tmpdir)
      File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 884, in install_eggs
        return self.build_and_install(setup_script, setup_base)
      File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 1152, in build_and_install
        self.run_setup(setup_script, setup_base, args)
      File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 1138, in run_setup
        run_setup(setup_script, args)
      File "C:\Python27\lib\site-packages\setuptools\sandbox.py", line 253, in run_setup
        raise
      File "C:\Python27\Lib\contextlib.py", line 35, in __exit__
        self.gen.throw(type, value, traceback)
      File "C:\Python27\lib\site-packages\setuptools\sandbox.py", line 195, in setup_context
        yield
      File "C:\Python27\Lib\contextlib.py", line 35, in __exit__
        self.gen.throw(type, value, traceback)
      File "C:\Python27\lib\site-packages\setuptools\sandbox.py", line 166, in save_modules
        saved_exc.resume()
      File "C:\Python27\lib\site-packages\setuptools\sandbox.py", line 141, in resume
        six.reraise(type, exc, self._tb)
      File "C:\Python27\lib\site-packages\setuptools\sandbox.py", line 154, in save_modules
        yield saved
      File "C:\Python27\lib\site-packages\setuptools\sandbox.py", line 195, in setup_context
        yield
      File "C:\Python27\lib\site-packages\setuptools\sandbox.py", line 250, in run_setup
        _execfile(setup_script, ns)
      File "C:\Python27\lib\site-packages\setuptools\sandbox.py", line 44, in _execfile
        code = compile(script, filename, 'exec')
      File "c:\users\shiyan\appdata\local\temp\easy_install-mfbele\setuptools_scm-7.0.5\setup.py", line 20
        def scm_version() -> str:
                          ^
    SyntaxError: invalid syntax
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

```