problems with Methods in Python 3.4.2

[claudemirxavier49 at gmail.com]

Traceback (most recent call last):
  File "<pyshell#12>", line 1, in <module>
    nome = input("Digite seu nome:")
  File "<string>", line 1, in <module>
NameError: name 'rick' is not defined
>>> 
Estou com esse problema alguem me ajuda pfvr