Avoid invalid syntax warning when installing with Python3

Author: Flamefire

easybuild/tools/py2vs3/py2.py

@@ -57,9 +57,12 @@ def subprocess_popen_text(cmd, **kwargs):
     return subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, **kwargs)
 
 
+# Wrapped in exec to avoid invalid syntax warnings for Python 3
+exec('''
 def raise_with_traceback(exception_class, message, traceback):
     """Raise exception of specified class with given message and traceback."""
     raise exception_class, message, traceback  # noqa: E999
+''')
 
 
 def extract_method_name(method_func):