sqlalchemy: `from sqlalchemy import create_engine` import error

Describe the bug Getting the following when importing 1.4.0 sqlalchemy’s create_engine method:

Python 2.7.5 (default, Aug  7 2019, 00:51:29)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)] on linux2
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>>> from sqlalchemy import create_engine
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/__init__.py", line 9, in <module>
    from .engine import create_engine
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/__init__.py", line 18, in <module>
    from . import events
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/events.py", line 9, in <module>
    from .base import Engine
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 12, in <module>
    from .interfaces import Connectable
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/interfaces.py", line 11, in <module>
    from ..sql.compiler import Compiled  # noqa
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/sql/__init__.py", line 13, in <module>
    from .expression import Alias
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/sql/expression.py", line 144, in <module>
    from .lambdas import lambda_stmt
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/sql/lambdas.py", line 1067
    exec(code, vars_, vars_)
SyntaxError: unqualified exec is not allowed in function '_rewrite_code_obj' it contains a nested function with free variables