Get keys from a dicionary

[John Gordon]

In <aac0b123-673b-4d8f-bc05-1f639515a951 at c18g2000yqj.googlegroups.com> macm <moura.mario at gmail.com> writes:

> >>> myDict = {}
> >>> myDict['foo'] = {}
> >>> myDict['foo']['bar'] = 'works'

> -----

> >>> def myFunction( MyObj ):
> ...	# MyObj is a nested dicionary (normaly 2 steps like myDict['foo']
> ['bar'])
> ...	# I want inspect this MyObj
> ...	# what keys was pass
> ...	print MyObj.keys() ## WRONG
> ...	# So What I want is :
> ...	# return foo bar

> ----------------

> >>> result = myFunction( myDict['foo']['bar'] )
> >>> result

> Should print :

> ... foo bar

I don't think there's a simple way to do what you want.

You could inspect the whole dictionary to find the keys that map to a
given value, like so:

def MyFunction(mydict, x):
  for k1 in mydict:
    for k2 in mydict[k1]:
      if mydict[k1][k2] == x:
        return "%s %s" % (k1, k2)

>>> print MyFunction(myDict, 'works')
>>> foo bar

-- 
John Gordon                   A is for Amy, who fell down the stairs
gordon at panix.com              B is for Basil, assaulted by bears
                                -- Edward Gorey, "The Gashlycrumb Tinies"