** Python Support Thread **
07-03-2011
, 10:37 PM
07-03-2011
, 11:40 PM
07-05-2011
, 01:25 PM
07-06-2011
, 05:01 PM
dave,
not a ton of time so i'm not going to give your post a colonic or anything, but a few comments (some of which might even be useful):
for most software problems, once you've solved it for two or three, you've solved it for N.
this is one of the things about python that drives me nuts. keys() is a method that returns something related to the object, but sort() is a method that acts on the contents of the object and returns nothing. how am i supposed to know this? i just have to remember it. this violates the principle of least surprise and, y'know, drives me nuts.
ruby has a simple and elegant way to deal with this problem. the sort() method returns an array containing the sorted elements. if you want to do the sort in place, you have sort!(). the ! notation is simple and consistent throughout the language, a beautiful thing.
you aren't packing the values correctly, so the consuming code gets confused, leading to erroneous output.
1. don't know if it's because of pasting into the forum or whatever but keep your comments at the same indentation level as the code they're commenting. the above is unnecessarily difficult to read and understand.
2. i'm not entirely clear on what you're trying to do but the consuming function wants a dictionary so your function should create and return a dictionary. not sure why you think you need to return multiple things; looks like you just return one thing: a dictionary.
hth/prepared for flames from the python fanboys
,
tyler
not a ton of time so i'm not going to give your post a colonic or anything, but a few comments (some of which might even be useful):
Quote:
Code:
subNames = subjects.keys()
subNames.sort()
ruby has a simple and elegant way to deal with this problem. the sort() method returns an array containing the sorted elements. if you want to do the sort in place, you have sort!(). the ! notation is simple and consistent throughout the language, a beautiful thing.
Quote:
So the code that I output via my own function should print out. I assume this from the mouthful they asked for and the fact that it somewhat works:
{'2.00': (5, 9)}
{'2.01': (2, 2)}
{'2.02': (1, 17)}
{'2.03': (6, 1)}
{'2.04': (3, 2)}
{'2.05': (2, 2)}
{'2.00': (5, 9)}
{'2.01': (2, 2)}
{'2.02': (1, 17)}
{'2.03': (6, 1)}
{'2.04': (3, 2)}
{'2.05': (2, 2)}
Quote:
Code:
# The following sample code reads lines from the specified file and prints
# each one.
inputFile = open(filename)
#t = ()
t = []
for line in inputFile:
#erase \n and convert string to tuple (quoted string, lol).
line = str(line).strip('\n').split(',')
#convert the first elements in each tuple to a dictionary key.
r = line[0]
#convert the second and third elements to integer key values represented as tuples.
s = int(line [1]), int(line[2])
#create the actual dictionary
d = {r:s}
#create a tuple
#t += d,
#create a list since tuple idea didn't work too well.
#t.append(d)
#Heck, why not try this list conversion, too?
#t += d
#the helper code does not accept tuple or lists as my answer.
#return t
return d
#return d
2. i'm not entirely clear on what you're trying to do but the consuming function wants a dictionary so your function should create and return a dictionary. not sure why you think you need to return multiple things; looks like you just return one thing: a dictionary.
hth/prepared for flames from the python fanboys
,tyler
07-06-2011
, 11:25 PM
I don't always agree with the code style they give me.
For example, using the globals seems unneccessary to me:
Not sure what you are talking about irt to .sort(). It appears to sort the data into something more organized, which is what is suggested by the word 'sort.' Mind that I am not a very sophisticated coder.
I read all of it and just concluded that Python is for people who haven't discovered Ruby.
As far as the dictionary issue. I over-thunk the idea and forgot YAGNI.
For example, using the globals seems unneccessary to me:
Code:
VALUE, WORK = 0,1
def myFunction():
####
for s in subNames:
val = subjects[s][VALUE]
work = subjects[s][WORK]
###
I read all of it and just concluded that Python is for people who haven't discovered Ruby.
As far as the dictionary issue. I over-thunk the idea and forgot YAGNI.
07-06-2011
, 11:43 PM
07-07-2011
, 12:03 AM
I remember reading an interview with Yukihiro Matsumoto (Ruby creator) where he stated that if he was aware of Python when he started, he probably wouldn't have started writing Ruby at all.
07-07-2011
, 08:41 AM