On Wed, 22 Oct 2014 14:35:18 -0700 (PDT), sohcahto...@gmail.com wrote: >On Wednesday, October 22, 2014 2:06:35 PM UTC-7, Seymore4Head wrote: >> On Wed, 22 Oct 2014 16:57:00 -0400, Joel Goldstick >> <joel.goldst...@gmail.com> wrote: >> >> >On Wed, Oct 22, 2014 at 4:30 PM, Seymore4Head >> ><Seymore4Head@hotmail.invalid> wrote: >> >> def nametonumber(name): >> >> lst=[""] >> >> for x,y in enumerate (name): >> >> lst=lst.append(y) >> >> print (lst) >> >> return (lst) >> >> a=["1-800-getcharter"] >> >> print (nametonumber(a))#18004382427837 >> >> >> >> >> >> The syntax for when to use a () and when to use [] still throws me a >> >> curve. >> >() is tuples which are immutable which means that the items can't be >> >changed. [] is list which means that each item can be changed. >> >Tuples are useful because they can be used as keys in dictionaries and >> >are guarantied not to change. Lists are useful because they can be >> >updated. >> > >> >What you are doing confuses me. You don't use x, which is the enumerated >> >value. >> > >> >FIrst lst should be lst = [] . You don't need to set the first >> >element in the list to an empty string. You just want to establish >> >that you have an empty list called lst >> >Second, you don't need lst = lst.append(y) because you can just say >> >lst.append(y). This will append the y value to the end of the list. >> >As to converting letters to the corresponding numbers on a phone >> >keypad, you don't show you code here for that >> >> >> >> For now, I am trying to end up with a list that has each character in >> >> "a" as a single item. >> >> >> >> I get: >> >> None >> >> None >> >> -- >> >> https://mail.python.org/mailman/listinfo/python-list >> >> The lst=lst.append(y) >> Was the mistake I never could see. >> >> I am using enumerate just for practice. To me that is just as easy as >> typing len(something) and it seems more flexible. >> >> and.......the reason I don't show the code for the conversions is that >> I haven't got that far yet. :) >> >> Thank you > >I'm still confused as to why you're using enumerate. Using it when you don't >need to for "practice" just seems strange. You don't even need to use >len(something) in your case. You should just be using 'for y in name:' if you >don't need that x. Enumerate is essentially just a shortcut to zipping a >range based on the length. For example... > >for x, y in enumerate(name): > >is equivalent to: > >for x, y in zip(range(len(name)), name): > >And both are pointless if you're not using the x. > >Also, is there a reason why you're defining 'a' to be a list with a single >string value, rather than just defining it as a string? It seems like you >should probably just have: > >a = "1-800-getcharter"
The lst=lst part was throwing an error I didn't understand. That was the only reason I added brackets around the 'a'. I was getting in to trial and error stuff. Mostly error. -- https://mail.python.org/mailman/listinfo/python-list
