j wrote:
On Nov 23, 12:37 pm, Neo <n...@picture-art.eu> wrote:
astral orange schrieb:
Hi, I am trying to teach myself Python and have a good book to help me
but I am stuck on something and I would like for someone to explain
the following piece of code for me and what it's actually doing.
Certain parts are very clear but once it enters the "def store(data,
full_name): ...." function and the "def lookup()..." function things
get a little confusing for me. Specifically, lines 103-108 *and* Lines
110-111.
Lastly, I am not sure how to print the results I've put into this
program either, the book I'm reading doesn't tell me. As you can tell,
I am a beginner and I don't truly understand everything that is going
on here...a lot, but not all....
Here is the code:
92 def init(data):
93 data['first'] = {}
94 data['middle'] = {}
95 data['last'] = {}
96
97 def store(data, full_name):
98 names = full_name.split()
100 if len(names) == 2: names.insert(1, '')
101 labels = 'first', 'middle', 'last'
103 for label, name in zip(labels, names):
104 people = lookup(data, label, name)
105 if people:
106 people.append(full_name)
107 else:
108 data[label][name] = [full_name]
109
110 def lookup(data, label, name):
111 return data[label].get(name)
112
113
114 MyNames = {}
115 init(MyNames)
116 store(MyNames, 'John Larry Smith')
117 lookup(MyNames, 'middle', 'Smith')
If it tells you so I'm not really sure its a good book - partially for
teaching you into the unpythonic way to do things (above stuff, if its
not a counter example, should really go into a class)
Have you tried the tutorial first? Its online and very easy to follow
from the very beginning but you can also skip parts if you are sure you
already understand it:
http://docs.python.org/tutorial/
HTH
Tino
The book is "Apress Beginning Python 2nd Edition". I think what you
are saying is if I don't understand all of the code I should go into a
class? Unfortunately I don't have the money or time to enroll into a
class and even if I did they wouldn't be teaching Python it would be
Java instead...and I've already taken Java before...so that's not
really an option...
[snip]
No, he's saying that the _functions_ shown in the code should go into a
class, but the main criticism is that judging by the code shown above it
doesn't look like a good book, and you should look at the on-line
tutorial first if you haven't already done so.
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