--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DebugClients/Python3/DebugVariables.py Wed Sep 14 20:08:16 2016 +0200
@@ -0,0 +1,282 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2016 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing classes and functions to dump variable contents.
+"""
+
+#
+# This code was inspired by pydevd.
+#
+
+MaxItemsToHandle = 300
+TooLargeMessage = ("Too large to show contents. Max items to show: " +
+ str(MaxItemsToHandle))
+TooLargeAttribute = "Too large to be handled."
+
+############################################################
+## Classes implementing resolvers for various compund types
+############################################################
+
+class BaseResolver(object):
+ """
+ Base class of the resolver class tree.
+ """
+ def resolve(self, var, attribute):
+ """
+ Public method to get an attribute from a variable.
+
+ @param var variable to extract an attribute or value from
+ @type any
+ @param attribute name of the attribute to extract
+ @type str
+ @return value of the attribute
+ @rtype any
+ """
+ raise NotImplementedError
+
+ def getDictionary(self, var):
+ """
+ Public method to get the attributes of a variable as a dictionary.
+
+ @param var variable to be converted
+ @type any
+ @return dictionary containing the variable attributes
+ @rtype dict
+ """
+ raise NotImplementedError
+
+
+class DefaultResolver(BaseResolver):
+ """
+ Class used to resolve the default way.
+ """
+ def resolve(self, var, attribute):
+ """
+ Public method to get an attribute from a variable.
+
+ @param var variable to extract an attribute or value from
+ @type any
+ @param attribute name of the attribute to extract
+ @type str
+ @return value of the attribute
+ @rtype any
+ """
+ return getattr(var, attribute)
+
+ def getDictionary(self, var):
+ """
+ Public method to get the attributes of a variable as a dictionary.
+
+ @param var variable to be converted
+ @type any
+ @return dictionary containing the variable attributes
+ @rtype dict
+ """
+ names = dir(var)
+ if not names and hasattr(var, "__members__"):
+ names = var.__members__
+
+ d = {}
+ for name in names:
+ try:
+ attribute = getattr(var, name)
+ d[name] = attribute
+ except Exception:
+ pass # if we can't get it, simply ignore it
+
+ return d
+
+
+class DictResolver(BaseResolver):
+ """
+ Class used to resolve from a dictionary.
+ """
+ def resolve(self, var, attribute):
+ """
+ Public method to get an attribute from a variable.
+
+ @param var variable to extract an attribute or value from
+ @type dict
+ @param attribute name of the attribute to extract
+ @type str
+ @return value of the attribute
+ @rtype any
+ """
+ if attribute in ('__len__', TooLargeAttribute):
+ return None
+
+ if "(" not in attribute:
+ try:
+## if attribute[0] == "'" and attribute[-1] == "'":
+## attribute = attribute[1:-1]
+ return var[attribute]
+ except Exception:
+ return getattr(var, attribute)
+
+ expectedID = int(attribute.split("(")[-1][:-1])
+ for key, value in var.items():
+ if id(key) == expectedID:
+ return value
+
+ return None
+
+ def __keyToStr(self, key):
+ if isinstance(key, str):
+ return repr(key)
+ else:
+ return key
+
+ def getDictionary(self, var):
+ """
+ Public method to get the attributes of a variable as a dictionary.
+
+ @param var variable to be converted
+ @type any
+ @return dictionary containing the variable attributes
+ @rtype dict
+ """
+ d = {}
+ count = 0
+ for key, value in var.items():
+ count += 1
+ key = "{0} ({1})".format(self.__keyToStr(key), id(key))
+ d[key] = value
+ if count > MaxItemsToHandle:
+ d[TooLargeAttribute] = TooLargeMessage
+ break
+
+ d["__len__"] = len(var)
+
+ # in case it has additional fields
+ additionals = defaultResolver.getDictionary(var)
+ d.update(additionals)
+
+ return d
+
+
+class ListResolver(BaseResolver):
+ """
+ Class used to resolve from a tuple or list.
+ """
+ def resolve(self, var, attribute):
+ """
+ Public method to get an attribute from a variable.
+
+ @param var variable to extract an attribute or value from
+ @type tuple or list
+ @param attribute name of the attribute to extract
+ @type str
+ @return value of the attribute
+ @rtype any
+ """
+ if attribute in ('__len__', TooLargeAttribute):
+ return None
+
+ try:
+ return var[int(attribute)]
+ except Exception:
+ return getattr(var, attribute)
+
+ def getDictionary(self, var):
+ """
+ Public method to get the attributes of a variable as a dictionary.
+
+ @param var variable to be converted
+ @type any
+ @return dictionary containing the variable attributes
+ @rtype dict
+ """
+ length = len(var)
+ d = {}
+ formatStr = "{0:0" + str(len(str(length))) + "d}"
+ count = 0
+ for value in var:
+ d[formatStr.format(count)] = value
+ count += 1
+ if count > MaxItemsToHandle:
+ d[TooLargeAttribute] = TooLargeMessage
+ break
+
+ d["__len__"] = length
+
+ # in case it has additional fields
+ additionals = defaultResolver.getDictionary(var)
+ d.update(additionals)
+
+ return d
+
+
+defaultResolver = DefaultResolver()
+dictResolver = DictResolver()
+listResolver = ListResolver()
+
+# TODO: add resolver for set and frozenset
+# TODO: add resolver for numpy arrays
+# TODO: add resolver for Django MultiValueDict
+# TODO: add resolver for collections.deque
+
+############################################################
+## Methods to determine the type of a variable and the
+## resolver class to use
+############################################################
+
+_TypeMap = None
+
+def _initTypeMap():
+ """
+ Protected function to initialize the type map
+ """
+ global _TypeMap
+
+ _TypeMap = [
+ (type(None), None,),
+ (int, None),
+ (float, None),
+ (complex, None),
+ (str, None),
+ (tuple, listResolver),
+ (list, listResolver),
+ (dict, dictResolver),
+ ]
+
+ try:
+ _TypeMap.append((long, None)) # __IGNORE_WARNING__
+ except Exception:
+ pass # not available on all python versions
+
+ try:
+ _TypeMap.append((unicode, None)) # __IGNORE_WARNING__
+ except Exception:
+ pass # not available on all python versions
+
+
+def getType(obj):
+ """
+ Public method to get the type information for an object.
+
+ @param obj object to get type information for
+ @type any
+ @return tuple containing the type, type name, type string and resolver
+ @rtype tuple of type, str, str, BaseResolver
+ """
+ typeObject = type(obj)
+ typeName = typeObject.__name__
+ typeStr = str(typeObject)[8:-2]
+
+ if typeStr.startswith(("PyQt5.", "PyQt4.")):
+ resolver = None
+ else:
+ if _TypeMap is None:
+ _initTypeMap()
+
+ for typeData in _TypeMap:
+ if isinstance(obj, typeData[0]):
+ resolver = typeData[1]
+ break
+ else:
+ resolver = defaultResolver
+
+ return typeObject, typeName, typeStr, resolver
