Hello ,i have a problem to reinstall dev-python/extras-1.0.0-r1

log:

• Package: dev-python/extras-1.0.0-r1
• Repository: python-modules-kit
• USE: amd64 elibc_glibc kernel_linux python_targets_python2_7 python_targets_python3_7 userland_GNU
• FEATURES: network-sandbox preserve-libs sandbox userpriv usersandbox
  >>> Unpacking source...
  >>> Unpacking extras-1.0.0.tar.gz to /var/tmp/portage/dev-python/extras-1.0.0-r1/work
  >>> Source unpacked in /var/tmp/portage/dev-python/extras-1.0.0-r1/work
  >>> Preparing source in /var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0 ...
• Build system packages:
• dev-python/setuptools : 63.1.0
  >>> Source prepared.
  >>> Configuring source in /var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0 ...
  >>> Source configured.
  >>> Compiling source in /var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0 ...
• python3_7: running distutils-r1_run_phase distutils-r1_python_compile
  python3.7 setup.py build -j 41
  running build
  running build_py
  creating /var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0-python3_7/lib/extras
  copying extras/_init_.py -> /var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0-python3_7/lib/extras
  creating /var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0-python3_7/lib/extras/tests
  copying extras/tests/_init_.py -> /var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0-python3_7/lib/extras/tests
  copying extras/tests/test_extras.py -> /var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0-python3_7/lib/extras/tests
  warning: build_py: byte-compiling is disabled, skipping.

• python2_7: running distutils-r1_run_phase distutils-r1_python_compile
  python2.7 setup.py build
  Traceback (most recent call last):
  File "setup.py", line 8, in <module>
  testtools_cmd = extras.try_import('testtools.TestCommand')
  File "/var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0/extras/_init_.py", line 50, in try_import
  _import_(module_name)
  File "/usr/lib64/python2.7/site-packages/testtools/_init_.py", line 71, in <module>
  from testtools.testcase import (
  File "/usr/lib64/python2.7/site-packages/testtools/testcase.py", line 193, in <module>
  fixtures = try_import('fixtures')
  File "/var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0/extras/_init_.py", line 50, in try_import
  _import_(module_name)
  File "/usr/lib64/python2.7/site-packages/fixtures/_init_.py", line 89, in <module>
  from fixtures._fixtures import (
  File "/usr/lib64/python2.7/site-packages/fixtures/fixtures/init_.py", line 55, in <module>
  from fixtures._fixtures.mockpatch import (
  File "/usr/lib64/python2.7/site-packages/fixtures/_fixtures/mockpatch.py", line 70
  class MockPatchMultiple(_Base, metaclass=_MockPatchMultipleMeta):
  ^
  SyntaxError: invalid syntax
• ERROR: dev-python/extras-1.0.0-r1::python-modules-kit failed (compile phase):
• (no error message)
  *
• Call stack:
• ebuild.sh, line 93: Called src_compile
• environment, line 3569: Called distutils-r1_src_compile
• environment, line 1591: Called _distutils-r1_run_foreach_impl 'distutils-r1_python_compile'
• environment, line 694: Called python_foreach_impl 'distutils-r1_run_phase' 'distutils-r1_python_compile'
• environment, line 3170: Called multibuild_foreach_variant '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'distutils-r1_python_compile'
• environment, line 2644: Called _multibuild_run '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'distutils-r1_python_compile'
• environment, line 2642: Called _python_multibuild_wrapper 'distutils-r1_run_phase' 'distutils-r1_python_compile'
• environment, line 1080: Called distutils-r1_run_phase 'distutils-r1_python_compile'
• environment, line 1573: Called distutils-r1_python_compile
• environment, line 1380: Called esetup.py 'build'
• environment, line 2179: Called die
• The specific snippet of code:
• "${@}" || die "${die_args[@]}";
  *
• If you need support, post the output of `emerge --info '=dev-python/extras-1.0.0-r1::python-modules-kit'`,
• the complete build log and the output of `emerge -pqv '=dev-python/extras-1.0.0-r1::python-modules-kit'`.
• The complete build log is located at '/var/tmp/portage/dev-python/extras-1.0.0-r1/temp/build.log'.
• The ebuild environment file is located at '/var/tmp/portage/dev-python/extras-1.0.0-r1/temp/environment'.
• Working directory: '/var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0'
• S: '/var/tmp/portage/dev-python/extras-1.0.0-r1/work/extras-1.0.0'