import warnings

def setopts(opts, kwargs):

import matplotlib

for key, value in kwargs.items():

if 'rcParams' in kwargs and key == 'rcParams':

continue

if key in opts:

opts[key] = value

else:

warnings.warn('Warning: Ignoring invalid keyword option "%s".' % key, SyntaxWarning)

# Override or add rcParams

if 'rcParams' in kwargs:

for key, value in kwargs['rcParams'].items():

opts['rcParams'][key] = kwargs['rcParams'][key]

if opts['backend'] != 'default':

try:

matplotlib.use(opts['backend'], force=True)

except:

matplotlib.use(matplotlib.get_backend(), force=True)

warnings.warn('Warning: matplotlib(' + opts['backend'] + \

') call failed. Using default backend of ' +

matplotlib.get_backend(), SyntaxWarning)

style = opts['style']

import matplotlib.style

rclib = matplotlib.style.library

if style in matplotlib.style.available:

# rc parameters for style that differ from default

rcstyle = dict(rclib[style])

else:

rcstyle = dict(rclib['fast'])

warnings.warn('style "' + style + \

'" is not in list of known styles: ' + \

str(matplotlib.style.available) + \

'. Using style=fast', SyntaxWarning)

# Get default rc parameters

rc = dict(matplotlib.rcParamsDefault)

# Override default rc value with a style value

for key in rcstyle:

rc[key] = rcstyle[key]

# Override default rc style values with user-provided values

for key in opts['rcParams']:

if key in rc: # Is an actual rc parameter

rc[key] = opts['rcParams'][key]

else:

warnings.warn('rc parameter "' + key + '" is not in a known rc parameter.', SyntaxWarning)

opts['rcParams'] = rc

return opts