How to sort the Python dict type key (keys) or value (values)

How to sort the Dict type key (keys) (Python 2.4 or later):

Mydict = {'Carl': 40,          'Alan': 2,          'Bob': 1,          'Danny': 3} forKeyinchSorted (Mydict.iterkeys ()):Print "%s:%s"% (key, Mydict[key])

Results:

Alan:213

Excerpt from Python faq:http://www.python.org/doc/faq/general/#why-doesn-t-list-sort-return-the-sorted-list.

If you sort by key (keys) in the reverse order, you need to add the reverse=true parameter to the sorted function.

How to sort the Dict type key (keys) (older than Python 2.4):

Keylist = Mydict.keys () keylist.sort () for in keylist:    print"  %s:%s" % (key, Mydict[key])

This procedure results in the same result as above.

How to sort by value (values) for the Dict type (Python 2.4 or later):

 for  in Sorted (Mydict.iteritems (), key=Lambda  (k,v): (v,k)):    print" %s:%s " % (key, value)

Results:

Bob:12340

Excerpt from Nick Galbreath's Digital Sanitation Engineering Blog article

See:

• The documentation for with sorted 2.1 built-in Functions and the .sort() method in 3.6.4 Mutable Sequence typesin the Python Li Brary Reference.
• Sorting dictionaries by Value in Python (improved.) by Gregg Lind August 30, 2008

Original URL:http://www.saltycrane.com/blog/2007/09/how-to-sort-python-dictionary-by-keys/

How to sort the Python dict type key (keys) or value (values)