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import inspect
import types
import sys
import pydoc
__all__ = ['info','source']
# NOTE: pydoc defines a help function which works simliarly to this
# except it uses a pager to take over the screen.
# combine name and arguments and split to multiple lines of
# width characters. End lines on a comma and begin argument list
# indented with the rest of the arguments.
def split_line(name, arguments, width):
firstwidth = len(name)
k = firstwidth
newstr = name
sepstr = ", "
arglist = arguments.split(sepstr)
for argument in arglist:
if k == firstwidth:
addstr = ""
else:
addstr = sepstr
k = k + len(argument) + len(addstr)
if k > width:
k = firstwidth + 1 + len(argument)
newstr = newstr + ",\n" + " "*(firstwidth+2) + argument
else:
newstr = newstr + addstr + argument
return newstr
_namedict = None
_dictlist = None
# Traverse all module directories underneath globals to see if something is defined
def makenamedict():
import scipy
thedict = {'scipy':scipy.__dict__}
dictlist = ['scipy']
totraverse = [scipy.__dict__]
while 1:
if len(totraverse) == 0:
break
thisdict = totraverse.pop(0)
for x in thisdict.keys():
if isinstance(thisdict[x],types.ModuleType):
modname = thisdict[x].__name__
if modname not in dictlist:
moddict = thisdict[x].__dict__
dictlist.append(modname)
totraverse.append(moddict)
thedict[modname] = moddict
return thedict, dictlist
def info(object=None,maxwidth=76,output=sys.stdout,):
"""Get help information for a function, class, or module.
Example:
>>> from scipy import *
>>> info(polyval)
polyval(p, x)
Evaluate the polymnomial p at x.
Description:
If p is of length N, this function returns the value:
p[0]*(x**N-1) + p[1]*(x**N-2) + ... + p[N-2]*x + p[N-1]
"""
global _namedict, _dictlist
if hasattr(object,'_ppimport_importer') or \
hasattr(object, '_ppimport_module'):
object = object._ppimport_module
elif hasattr(object, '_ppimport_attr'):
object = object._ppimport_attr
if object is None:
info(info)
elif isinstance(object, types.StringType):
if _namedict is None:
_namedict, _dictlist = makenamedict()
numfound = 0
objlist = []
for namestr in _dictlist:
try:
obj = _namedict[namestr][object]
if id(obj) in objlist:
print >> output, "\n *** Repeat reference found in %s *** " % namestr
else:
objlist.append(id(obj))
print >> output, " *** Found in %s ***" % namestr
info(obj)
print >> output, "-"*maxwidth
numfound += 1
except KeyError:
pass
if numfound == 0:
print >> output, "Help for %s not found." % object
else:
print >> output, "\n *** Total of %d references found. ***" % numfound
elif inspect.isfunction(object):
name = object.func_name
arguments = apply(inspect.formatargspec, inspect.getargspec(object))
if len(name+arguments) > maxwidth:
argstr = split_line(name, arguments, maxwidth)
else:
argstr = name + arguments
print >> output, " " + argstr + "\n"
print >> output, inspect.getdoc(object)
elif inspect.isclass(object):
name = object.__name__
if hasattr(object, '__init__'):
arguments = apply(inspect.formatargspec, inspect.getargspec(object.__init__.im_func))
arglist = arguments.split(', ')
if len(arglist) > 1:
arglist[1] = "("+arglist[1]
arguments = ", ".join(arglist[1:])
else:
arguments = "()"
else:
arguments = "()"
if len(name+arguments) > maxwidth:
argstr = split_line(name, arguments, maxwidth)
else:
argstr = name + arguments
print >> output, " " + argstr + "\n"
doc1 = inspect.getdoc(object)
if doc1 is None:
if hasattr(object,'__init__'):
print >> output, inspect.getdoc(object.__init__)
else:
print >> output, inspect.getdoc(object)
methods = pydoc.allmethods(object)
if methods != []:
print >> output, "\n\nMethods:\n"
for meth in methods:
if meth[0] == '_':
continue
thisobj = getattr(object, meth, None)
if thisobj is not None:
methstr, other = pydoc.splitdoc(inspect.getdoc(thisobj) or "None")
print >> output, " %s -- %s" % (meth, methstr)
elif type(object) is types.InstanceType: ## check for __call__ method
print >> output, "Instance of class: ", object.__class__.__name__
print >> output
if hasattr(object, '__call__'):
arguments = apply(inspect.formatargspec, inspect.getargspec(object.__call__.im_func))
arglist = arguments.split(', ')
if len(arglist) > 1:
arglist[1] = "("+arglist[1]
arguments = ", ".join(arglist[1:])
else:
arguments = "()"
if hasattr(object,'name'):
name = "%s" % object.name
else:
name = "<name>"
if len(name+arguments) > maxwidth:
argstr = split_line(name, arguments, maxwidth)
else:
argstr = name + arguments
print >> output, " " + argstr + "\n"
doc = inspect.getdoc(object.__call__)
if doc is not None:
print >> output, inspect.getdoc(object.__call__)
print >> output, inspect.getdoc(object)
else:
print >> output, inspect.getdoc(object)
elif inspect.ismethod(object):
name = object.__name__
arguments = apply(inspect.formatargspec, inspect.getargspec(object.im_func))
arglist = arguments.split(', ')
if len(arglist) > 1:
arglist[1] = "("+arglist[1]
arguments = ", ".join(arglist[1:])
else:
arguments = "()"
if len(name+arguments) > maxwidth:
argstr = split_line(name, arguments, maxwidth)
else:
argstr = name + arguments
print >> output, " " + argstr + "\n"
print >> output, inspect.getdoc(object)
elif hasattr(object, '__doc__'):
print >> output, inspect.getdoc(object)
def source(object, output=sys.stdout):
"""Write source for this object to output.
"""
try:
print >> output, "In file: %s\n" % inspect.getsourcefile(object)
print >> output, inspect.getsource(object)
except:
print >> output, "Not available for this object."
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