Output a variable name

[Muffinthief]

Is there any way to output a variable name, without knowing the variable in advance. (Ex. Myvar = 0, could i output "Myvar" )?

[ilikepython]

Is there any way to output a variable name, without knowing the variable in advance. (Ex. Myvar = 0, could i output "Myvar" )?

I don't really understand what you're asking. Could you please clarify?

Thanks

[bvdet]

Is there any way to output a variable name, without knowing the variable in advance. (Ex. Myvar = 0, could i output "Myvar" )?

You would have to have some means to identify the string for output (eg keep the data stored in a dictionary where the variable names are the dictionary keys). The global and local dictionaries contain these variables, so you may be able to access them that way.

>>> def var_name():
...     xyz = 0
...     for item in locals():
...         print item
...         
>>> var_name()
xyz
>>> 
>>> def var_names():
...     abc = 12
...     xyz = 13
...     for item in locals():
...         yield item
...         
>>> for i in var_names():
...     print i
...     
xyz
abc
>>> 

[ilikepython]

You would have to have some means to identify the string for output (eg keep the data stored in a dictionary where the variable names are the dictionary keys). The global and local dictionaries contain these variables, so you may be able to access them that way.

>>> def var_name():
...     xyz = 0
...     for item in locals():
...         print item
...         
>>> var_name()
xyz
>>> 
>>> def var_names():
...     abc = 12
...     xyz = 13
...     for item in locals():
...         yield item
...         
>>> for i in var_names():
...     print i
...     
xyz
abc
>>> 

Ah, now I know :)

[bartonc]

Is there any way to output a variable name, without knowing the variable in advance. (Ex. Myvar = 0, could i output "Myvar" )?

I always use the inspect module:

>>> import inspect
>>> class aClass:
...     aValue = 1
...     bValue = 'test'
...     
>>> anInstance = aClass()
>>> print [(name, value) for name, value in inspect.getmembers(anInstance) if not name.startswith("_")]
[('aValue', 1), ('bValue', 'test')]
>>>

[Muffinthief]

Thanks bvdet i understand now.