Fixed E303 flake8 errors

too many blank lines (3)

_pytest/python.py

@@ -48,7 +48,6 @@ def filter_traceback(entry):
     return p != cutdir1 and not p.relto(cutdir2) and not p.relto(cutdir3)
 
 
-
 def pyobj_property(name):
     def get(self):
         node = self.getparent(getattr(__import__('pytest'), name))
@@ -193,7 +192,6 @@ def pytest_make_parametrize_id(config, val, argname=None):
     return None
 
 
-
 class PyobjContext(object):
     module = pyobj_property("Module")
     cls = pyobj_property("Class")