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Script to autogenerate pyplot wrappers.
When this script is run, the current contents of pyplot are
split into generatable and non-generatable content (via the magic header
:attr:`PYPLOT_MAGIC_HEADER`) and the generatable content is overwritten.
Hence, the non-generatable content should be edited in the file
itself, whereas the generatable content must be edited via templates in
this file.
# We did try to do the wrapping the smart way,
# with callable functions and new.function, but could never get the
# docstrings right for python2.2. See
# For some later history, see
import os
import inspect
import random
import types
import textwrap
# import the local copy of matplotlib, not the installed one
#sys.path.insert(0, './lib')
from matplotlib.axes import Axes
# this is the magic line that must exist in pyplot, after which the boilerplate content will be
# appended
PYPLOT_MAGIC_HEADER = '################# REMAINING CONTENT GENERATED BY ##############\n'
PYPLOT_PATH = os.path.join(os.path.dirname(__file__), 'lib',
'matplotlib', '')
# This function was autogenerated by Do not edit as
# changes will be lost"""
def %(func)s(%(argspec)s):
%(ax)s = gca()
# allow callers to override the hold state by passing hold=True|False
%(washold)s = %(ax)s.ishold()
if hold is not None:
%(ret)s = %(ax)s.%(func)s(%(call)s)
return %(ret)s
# Used for misc functions such as cla/legend etc.
def %(func)s(%(argspec)s):
%(ret)s = gca().%(func)s(%(call)s)
return %(ret)s
# Used for colormap functions
def {name}():
set the default colormap to {name} and apply to current image if any.
See help(colormaps) for more information
rc('image', cmap='{name}')
im = gci()
if im is not None:
def boilerplate_gen():
"""Generator of lines for the automated part of pyplot."""
# these methods are all simple wrappers of Axes methods by the same
# name.
_plotcommands = (
_misccommands = (
cmappable = {
'contour' : 'if %(ret)s._A is not None: sci(%(ret)s)',
'contourf': 'if %(ret)s._A is not None: sci(%(ret)s)',
'hexbin' : 'sci(%(ret)s)',
'scatter' : 'sci(%(ret)s)',
'pcolor' : 'sci(%(ret)s)',
'pcolormesh': 'sci(%(ret)s)',
'hist2d' : 'sci(%(ret)s[-1])',
'imshow' : 'sci(%(ret)s)',
#'spy' : 'sci(%(ret)s)', ### may return image or Line2D
'quiver' : 'sci(%(ret)s)',
'specgram' : 'sci(%(ret)s[-1])',
'streamplot' : 'sci(%(ret)s)',
'tricontour' : 'if %(ret)s._A is not None: sci(%(ret)s)',
'tricontourf': 'if %(ret)s._A is not None: sci(%(ret)s)',
'tripcolor' : 'sci(%(ret)s)',
def format_value(value):
Format function default values as needed for inspect.formatargspec.
The interesting part is a hard-coded list of functions used
as defaults in pyplot methods.
if isinstance(value, types.FunctionType):
if value.__name__ in ('detrend_none', 'window_hanning'):
return '=mlab.' + value.__name__
if value.__name__ == 'mean':
return '=np.' + value.__name__
raise ValueError(('default value %s unknown to boilerplate.' + \
'formatvalue') % value)
return '='+repr(value)
text_wrapper = textwrap.TextWrapper(break_long_words=False)
for fmt, cmdlist in [(PLOT_TEMPLATE, _plotcommands),
(MISC_FN_TEMPLATE, _misccommands)]:
for func in cmdlist:
# For some commands, an additional line is needed to set the
# color map
if func in cmappable:
mappable = cmappable[func] % locals()
mappable = ''
# Get argspec of wrapped function
args, varargs, varkw, defaults = inspect.getargspec(getattr(Axes, func))
args.pop(0) # remove 'self' argument
if defaults is None:
defaults = ()
# How to call the wrapped function
call = []
for i, arg in enumerate(args):
if len(defaults) < len(args) - i:
call.append('%s' % arg)
call.append('%s=%s' % (arg, arg))
if varargs is not None:
if varkw is not None:
call = ', '.join(call)
text_wrapper.width = 80 - 19 - len(func)
join_with = '\n' + ' ' * (18 + len(func))
call = join_with.join(text_wrapper.wrap(call))
# Add a hold keyword argument if needed (fmt is PLOT_TEMPLATE) and
# possible (if *args is used, we can't just add a hold
# argument in front of it since it would gobble one of the
# arguments the user means to pass via *args)
if varargs:
sethold = "hold = %(varkw)s.pop('hold', None)" % locals()
elif fmt is PLOT_TEMPLATE:
defaults = defaults + (None,)
sethold = ''
# Now we can build the argspec for defining the wrapper
argspec = inspect.formatargspec(args, varargs, varkw, defaults,
argspec = argspec[1:-1] # remove parens
text_wrapper.width = 80 - 5 - len(func)
join_with = '\n' + ' ' * (5 + len(func))
argspec = join_with.join(text_wrapper.wrap(argspec))
# A gensym-like facility in case some function takes an
# argument named washold, ax, or ret
washold, ret, ax = 'washold', 'ret', 'ax'
bad = set(args) | set((varargs, varkw))
while washold in bad or ret in bad or ax in bad:
washold = 'washold' + str(random.randrange(10**12))
ret = 'ret' + str(random.randrange(10**12))
ax = 'ax' + str(random.randrange(10**12))
# Since we can't avoid using some function names,
# bail out if they are used as argument names
for reserved in ('gca', 'gci', 'draw_if_interactive'):
if reserved in bad:
msg = 'Axes method %s has kwarg named %s' % (func, reserved)
raise ValueError(msg)
yield fmt % locals()
cmaps = (
'gray' ,
'jet' ,
# add all the colormaps (autumn, hsv, ....)
for name in cmaps:
yield CMAP_TEMPLATE.format(name=name)
yield ''
yield '_setup_pyplot_info_docstrings()'
def build_pyplot():
pyplot_path = os.path.join(os.path.dirname(__file__), 'lib',
'matplotlib', '')
pyplot_orig = open(pyplot_path, 'r').readlines()
pyplot_orig = pyplot_orig[:pyplot_orig.index(PYPLOT_MAGIC_HEADER)+1]
except IndexError:
raise ValueError('The file *must* have the exact line: %s' % PYPLOT_MAGIC_HEADER)
pyplot = open(pyplot_path, 'w')
if __name__ == '__main__':
# Write the matplotlib.pyplot file
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