upstream/ipython Files · IPython/zmq/__init__.py

Proper error handling for nbformat versions in client code....

Proper error handling for nbformat versions in client code. 1. Users are warned when an older nbformat notebook is converted. 2. The notebook notifies the user when a notebook that is too new is attempted to load. To test these things, create a simple notebook. Then change its nbformat field by hand to 2 (to test 1) and then 4 (to test 2).

Fernando Perez - - Load All Authors

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             __init__.py
        
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      #-----------------------------------------------------------------------------

      #  Copyright (C) 2010-2011  The IPython Development Team

      #

      #  Distributed under the terms of the BSD License.  The full license is in

      #  the file COPYING.txt, distributed as part of this software.

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Verify zmq version dependency >= 2.1.4

      #-----------------------------------------------------------------------------

      import warnings

      from distutils.version import LooseVersion as V

      def check_for_zmq(minimum_version, module='IPython.zmq'):

          try:

              import zmq

          except ImportError:

              raise ImportError("%s requires pyzmq >= %s"%(module, minimum_version))

          pyzmq_version = zmq.__version__

          if 'dev' not in pyzmq_version and V(pyzmq_version) < V(minimum_version):

              raise ImportError("%s requires pyzmq >= %s, but you have %s"%(

                              module, minimum_version, pyzmq_version))

          # fix missing DEALER/ROUTER aliases in pyzmq < 2.1.9

          if not hasattr(zmq, 'DEALER'):

              zmq.DEALER = zmq.XREQ

          if not hasattr(zmq, 'ROUTER'):

              zmq.ROUTER = zmq.XREP

          if V(zmq.zmq_version()) >= V('4.0.0'):

              warnings.warn("""libzmq 4 detected.

              It is unlikely that IPython's zmq code will work properly.

              Please install libzmq stable, which is 2.1.x or 2.2.x""",

              RuntimeWarning)

      check_for_zmq('2.1.4')

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				#-----------------------------------------------------------------------------
				# Copyright (C) 2010-2011 The IPython Development Team
				#
				# Distributed under the terms of the BSD License. The full license is in
				# the file COPYING.txt, distributed as part of this software.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Verify zmq version dependency >= 2.1.4
				#-----------------------------------------------------------------------------

				import warnings
				from distutils.version import LooseVersion as V

				def check_for_zmq(minimum_version, module='IPython.zmq'):
				try:
				import zmq
				except ImportError:
				raise ImportError("%s requires pyzmq >= %s"%(module, minimum_version))

				pyzmq_version = zmq.__version__

				if 'dev' not in pyzmq_version and V(pyzmq_version) < V(minimum_version):
				raise ImportError("%s requires pyzmq >= %s, but you have %s"%(
				module, minimum_version, pyzmq_version))

				# fix missing DEALER/ROUTER aliases in pyzmq < 2.1.9
				if not hasattr(zmq, 'DEALER'):
				zmq.DEALER = zmq.XREQ
				if not hasattr(zmq, 'ROUTER'):
				zmq.ROUTER = zmq.XREP

				if V(zmq.zmq_version()) >= V('4.0.0'):
				warnings.warn("""libzmq 4 detected.
				It is unlikely that IPython's zmq code will work properly.
				Please install libzmq stable, which is 2.1.x or 2.2.x""",
				RuntimeWarning)

				check_for_zmq('2.1.4')