On Thu, Nov 27, 2014 at 4:51 AM, Alan Gauld <alan.ga...@btinternet.com> wrote: > On 27/11/14 04:18, boB Stepp wrote:
[...] >> So any variables lower in the program are accessible to those above it? > > > No. > Its not whether they are defined above or below each other its the level of > indentation. Both f and g are defined at the outer level of the module. They > are therefore global(within that module) and can each see the other. Steven > could just as well have written: > > def f(): return "Hello!" > > def g(): return f() Level of indentation is the key? Can you give me an example, not involving functions, where a variable is defined at an "inner" level of indentation, but is not accessible at the outermost level of indentation? I tried to construct such an example myself, but was unsuccessful. [...] >> day today. Despite having Grayson's book on Tkinter, it has been hard >> going for me. > > > Grayson's book is hard going and is very old now so some things have > improved and changed. In particular you now have access to Tix and ttf > on newer versions of Python. But since you are still using 2.4 that probably > doesn't affect you! :-) That is the main reason I got the book, because of the version of Python I am forced to use at work. > However, if you have access to it, you should consider getting Mark Lutz's > book Programming Python (4th ed). It's a massive 1600 pages > of which 400+ are about Tkinter programming (more than Grayson!) I actually purchased that book and his 4th edition of Learning Python when I first started getting interested in Python a couple of years ago. I will check out his Tkinter coverage and see if it is easier going. > And there is the bonus of 1200 other pages of detailed info about > the OS, Networking, databases etc. Again its a bit dry but full > of information. I looked at his discussion of scope last night in the latter book. I still don't think I am fully getting it yet. But I will continue to persevere. -- boB _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
