Get name of current class

Question

How do I get the name of the class I am currently in   Example   def get input class name        do things      return class name result  class foo        input   get input  class name goes here     Due to the nature of the program I am interfacing with  vistrails   I cannot use   init     to initialize input

User · Answer

Within the body of a class  the class name isn t defined yet  so it is not available   Can you not simply type the name of the class   Maybe you need to say more about the problem so we can find a solution for you   I would create a metaclass to do this work for you   It s invoked at class creation time  conceptually at the very end of the class  block   and can manipulate the class being created   I haven t tested this   class InputAssigningMetaclass type       def   new   cls  name  bases  attrs           cls input   get input name          return super MyType  cls    new   cls  name  bases  newattrs   class MyBaseFoo object         metaclass     InputAssigningMetaclass  class foo MyBaseFoo         etc  no need to create  input   class foo2 MyBaseFoo         etc  no need to create  input

User · Answer

I think  it should be like this       class foo            input   get input   qualname

User · Answer

obj   class     name   will get you any objects name  so you can do this   class Clazz        def getName self           return self   class     name     Usage    gt  gt  gt  c   Clazz    gt  gt  gt  c getName    Clazz

User · Answer

EDIT  Yes  you can  but you have to cheat  The currently running class name is present on the call stack  and the traceback module allows you to access the stack    gt  gt  gt  import traceback  gt  gt  gt  def get input class name           return class name encode  rot13         gt  gt  gt  class foo object             name   traceback extract stack   -1  2          input   get input  name        gt  gt  gt    gt  gt  gt  foo input  sbb    However  I wouldn t do this   My original answer is still my own preference as a solution   Original answer   probably the very simplest solution is to use a decorator  which is similar to Ned s answer involving metaclasses  but less powerful  decorators are capable of black magic  but metaclasses are capable of ancient  occult black magic    gt  gt  gt  def get input class name           return class name encode  rot13         gt  gt  gt  def inputize cls           cls input   get input cls   name            return cls       gt  gt  gt   inputize     class foo object           pass       gt  gt  gt  foo input  sbb   gt  gt  gt

User · Answer

import sys  def class meta frame       class context      module    in frame f locals     assert class context   Frame is not a class context       module name   frame f locals    module         class name   frame f code co name     return module name  class name  def print class path        print   s  s    class meta sys  getframe 1     class MyClass object       print class path

User · Answer

You can access it by the class  private attributes   cls name   self   class     name     EDIT   As said by Ned Batcheler  this wouldn t work in the class body  but it would in a method

User · Answer

PEP 3155 introduced   qualname    which was implemented in Python 3 3      For top-level functions and classes  the   qualname   attribute is equal to the   name   attribute  For nested classes  methods  and nested functions  the   qualname   attribute contains a dotted path leading to the object from the module top-level    It is accessible from within the very definition of a class or a function  so for instance   class Foo      print   qualname      will effectively print Foo  You ll get the fully qualified name  excluding the module s name   so you might want to split it on the   character   However  there is no way to get an actual handle on the class being defined    gt  gt  gt  class Foo          print  Foo  in globals         False

[python] Get name of current class?

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