flake8: remove trailing whitespace; blank lines for definitions E305 expected 2 blank lines after class or function definition, found 1 E306 expected 1 blank line before a nested definition, found 0 W291 trailing whitespace

try:
    # Python 3+
    from ssl import SSLError
except (ImportError, AttributeError):
    # Python 2.5-2.7
    from socket import sslerror as SSLError