import matplotlib import inspect import warnings # ipython relies on interactive_bk being defined here from matplotlib.rcsetup import interactive_bk __all__ = ['backend','show','draw_if_interactive', 'new_figure_manager', 'backend_version'] backend = matplotlib.get_backend() # validates, to match all_backends def pylab_setup(): 'return new_figure_manager, draw_if_interactive and show for pylab' # Import the requested backend into a generic module object if backend.startswith('module://'): backend_name = backend[9:] else: backend_name = 'backend_'+backend backend_name = backend_name.lower() # until we banish mixed case backend_name = 'matplotlib.backends.%s'%backend_name.lower() backend_mod = __import__(backend_name, globals(),locals(),[backend_name]) # Things we pull in from all backends new_figure_manager = backend_mod.new_figure_manager # image backends like pdf, agg or svg do not need to do anything # for "show" or "draw_if_interactive", so if they are not defined # by the backend, just do nothing def do_nothing_show(*args, **kwargs): frame = inspect.currentframe() fname = frame.f_back.f_code.co_filename if fname in ('', ''): warnings.warn(""" Your currently selected backend, '%s' does not support show(). Please select a GUI backend in your matplotlibrc file ('%s') or with matplotlib.use()""" % (backend, matplotlib.matplotlib_fname())) def do_nothing(*args, **kwargs): pass backend_version = getattr(backend_mod,'backend_version', 'unknown') show = getattr(backend_mod, 'show', do_nothing_show) draw_if_interactive = getattr(backend_mod, 'draw_if_interactive', do_nothing) # Additional imports which only happen for certain backends. This section # should probably disappear once all backends are uniform. if backend.lower() in ['wx','wxagg']: Toolbar = backend_mod.Toolbar __all__.append('Toolbar') matplotlib.verbose.report('backend %s version %s' % (backend,backend_version)) return new_figure_manager, draw_if_interactive, show