On Tuesday, April 5, 2016 at 9:53:30 AM UTC+5:30, Chris Angelico wrote: > On Tue, Apr 5, 2016 at 2:08 PM, Rustom Mody wrote: > >> 'import tk.ttk' looks for 'tk' in sys.modules, does not find it, looks > >> for a module named 'tk' on disk, does not find it, and says so. > > > > A well-known quote comes to mind: > > > > | There are only two hard things in Computer Science: cache invalidation and > > | naming things. > > > > eg. http://martinfowler.com/bliki/TwoHardThings.html > > > > particularly since this seems to be in both categories :-) > > sys.modules isn't really a cache in that sense, though. The "hard > problem" of cache invalidation comes from the fundamental assumption > that a cache hit should be semantically identical to a cache miss;
Following looks like a cache miss to me (certainly did to the OP): On Monday, April 4, 2016 at 9:01:41 PM UTC+5:30, ast wrote: > hello > > >>> import tkinter as tk > >>> import tk.ttk as ttk > > Traceback (most recent call last): > File "<pyshell#3>", line 1, in <module> > import tk.ttk as ttk > ImportError: No module named 'tk' > -- https://mail.python.org/mailman/listinfo/python-list
