Remove unnecessary try/except around ETSConfig.provisional_toolkit

[rahulporuri]

pyface/pyface/base_toolkit.py

Lines 81 to 103 in 004d6ee

	try:
	provisional_toolkit = ETSConfig.provisional_toolkit
	except AttributeError:
	from contextlib import contextmanager
	# for backward compatibility
	@contextmanager
	def provisional_toolkit(toolkit_name):
	""" Perform an operation with toolkit provisionally set
	This sets the toolkit attribute of the ETSConfig object set to the
	provided value. If the operation fails with an exception, the toolkit
	is reset to nothing.
	"""
	if ETSConfig.toolkit:
	raise AttributeError("ETSConfig toolkit is already set")
	ETSConfig.toolkit = toolkit_name
	try:
	yield
	except:
	# reset the toolkit state
	ETSConfig._toolkit = ""
	raise