python 2 syntax error while importing import pybtex.database

I am trying to run the package on power on cpu arch ppc64le and facing issue in test with invalid synTax $ pytest --cov-report=xml --cov=pybtex_docutils . ============================= test session starts ============================== platform linux2 -- Python 2.7.15, pytest-4.6.11, py-1.7.0, pluggy-0.12.0 rootdir: /home/travis/build/asellappen/pybtex-docutils plugins: cov-2.10.1 collected 3 items / 1 errors / 2 selected ==================================== ERRORS ==================================== ____ ERROR collecting test/test_backend.py _______ ../../../../virtualenv/python2.7.15/lib/python2.7/site-packages/_pytest/python.py:507: in _importtestmodule mod = self.fspath.pyimport(ensuresyspath=importmode) ../../../../virtualenv/python2.7.15/lib/python2.7/site-packages/py/_path/local.py:668: in pyimport import(modname) ../../../../virtualenv/python2.7.15/lib/python2.7/site-packages/_pytest/assertion/rewrite.py:304: in load_module exec(co, mod.dict) test_backend.py:7: in import pybtex.database E File "/home/travis/virtualenv/python2.7.15/lib/python2.7/site-packages/pybtex/database/init.py", line 124 E f" entries={repr_entry},\n\n" E ^ E SyntaxError: invalid syntax ---------- coverage: platform linux2, python 2.7.15-final-0 ---------- Coverage XML written to file coverage.xml !!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!! =========================== 1 error in 0.33 seconds ============================ The command "pytest --cov-report=xml --cov=pybtex_docutils ." exited with 2. Done. Your build exited with 1.

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