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# -*- coding: utf-8 -*-
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"""Support for wildcard pattern matching in object inspection.
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$Id: OInspect.py 608 2005-07-06 17:52:32Z fperez $
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#*****************************************************************************
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# Copyright (C) 2005 Jörgen Stenarson <jorgen.stenarson@bostream.nu>
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#*****************************************************************************
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from IPython import Release
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__author__ = "Jörgen Stenarson <jorgen.stenarson@bostream.nu>"
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__license__ = Release.license
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from IPython.genutils import dir2
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def create_typestr2type_dicts(dont_include_in_type2type2str=["lambda"]):
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"""Return dictionaries mapping lower case typename to type objects, from
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the types package, and vice versa."""
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for tname in dir(types):
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if tname[-4:]=="Type":
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typenamelist.append(tname)
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for tname in typenamelist:
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name=tname[:-4].lower()
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obj=getattr(types,tname)
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typestr2type[name]=getattr(types,tname)
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if name in dont_include_in_type2type2str:
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type2typestr[obj]=name
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return typestr2type,type2typestr
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typestr2type,type2typestr=create_typestr2type_dicts()
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def is_type(obj,typestr_or_type):
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"""is_type(obj,typestr_or_type) verifies if obj is of a certain type or
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group of types takes strings as parameters of the for 'tuple'<->TupleType
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'all' matches all types. TODO: Should be extended for choosing more than
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if typestr_or_type=="all":
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if type(typestr_or_type)==types.TypeType:
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test_type=typestr_or_type
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test_type=typestr2type.get(typestr_or_type,False)
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return isinstance(obj,test_type)
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def show_hidden(str,show_all=False):
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"""Return true for strings starting with single _ if show_all is true."""
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return show_all or str.startswith("__") or not str.startswith("_")
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class NameSpace(object):
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"""NameSpace holds the dictionary for a namespace and implements filtering
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def __init__(self,obj,name_pattern="*",type_pattern="all",ignore_case=True,
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self.show_all = show_all #Hide names beginning with single _
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self.name_pattern = name_pattern
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self.type_pattern = type_pattern
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self.ignore_case = ignore_case
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# We should only match EXACT dicts here, so DON'T use isinstance()
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if type(obj) == types.DictType:
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if isinstance(key, basestring):
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# This seemingly unnecessary try/except is actually needed
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# because there is code out there with metaclasses that
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# create 'write only' attributes, where a getattr() call
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# will fail even if the attribute appears listed in the
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# object's dictionary. Properties can actually do the same
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# thing. In particular, Traits use this pattern
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kv.append((key,getattr(obj,key)))
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except AttributeError:
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"""Return name space dictionary with objects matching type and name patterns."""
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return self.filter(self.name_pattern,self.type_pattern)
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def get_ns_names(self):
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"""Return list of object names in namespace that match the patterns."""
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return self.ns.keys()
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ns_names=property(get_ns_names,doc="List of objects in name space that "
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"match the type and name patterns.")
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def filter(self,name_pattern,type_pattern):
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"""Return dictionary of filtered namespace."""
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def glob_filter(lista,name_pattern,hidehidden,ignore_case):
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"""Return list of elements in lista that match pattern."""
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pattern=name_pattern.replace("*",".*").replace("?",".")
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reg=re.compile(pattern+"$",re.I)
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reg=re.compile(pattern+"$")
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result=[x for x in lista if reg.match(x) and show_hidden(x,hidehidden)]
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#Filter namespace by the name_pattern
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all=[(x,ns[x]) for x in glob_filter(ns.keys(),name_pattern,
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self.show_all,self.ignore_case)]
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#Filter namespace by type_pattern
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all=[(key,obj) for key,obj in all if is_type(obj,type_pattern)]
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#TODO: Implement dictionary like access to filtered name space?
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def list_namespace(namespace,type_pattern,filter,ignore_case=False,show_all=False):
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"""Return dictionary of all objects in namespace that matches type_pattern
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pattern_list=filter.split(".")
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if len(pattern_list)==1:
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ns=NameSpace(namespace,name_pattern=pattern_list[0],type_pattern=type_pattern,
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ignore_case=ignore_case,show_all=show_all)
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# This is where we can change if all objects should be searched or
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# only modules. Just change the type_pattern to module to search only
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ns=NameSpace(namespace,name_pattern=pattern_list[0],type_pattern="all",
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ignore_case=ignore_case,show_all=show_all)
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for name,obj in nsdict.iteritems():
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ns=list_namespace(obj,type_pattern,".".join(pattern_list[1:]),
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ignore_case=ignore_case,show_all=show_all)
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for inner_name,inner_obj in ns.iteritems():
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res["%s.%s"%(name,inner_name)]=inner_obj