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4. Use [code] tags to format code blocks. |
On December 04 2012 05:04 Recognizable wrote:
original = raw_input('Enter a word:')
word = original.lower()
pyg = 'ay'
new_wordV = word+pyg #w/Vowel
new_wordC = original[1:]+word[0]+pyg #w/Consonant
first = original[0]
if len(original) > 0 and original.isalpha():
if first == "a" or first == "i" or first == "e" or first == "o" or first == "u" or first == "A" or first == "I" or first == "E" or first == "O" or first == "U" :
print new_wordV
else:
print new_wordC
else:
print 'empty'
Can this be made to look easier/less lines of code? If so could you give me some pointers what I could do(don't do it for me) Because I once posted something here 5+ lines and it was all done in like 2 :O. Especially the line with all the first==, it bugs me. I tried messing around a bit but nothing worked.
(1) Don't use locals unless its necessary. In particular, you shouldn't need to pre-compute new_wordV and new_wordC until you actually need them (i.e., inside of the if-statement).
(2) The inner if-guard can be greatly simplified by using lower() as well as set inclusion (e.g., x in [1, 2, 3]) rather than repeated equality checks.
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On December 04 2012 05:04 Recognizable wrote:
original = raw_input('Enter a word:')
word = original.lower()
pyg = 'ay'
new_wordV = word+pyg #w/Vowel
new_wordC = original[1:]+word[0]+pyg #w/Consonant
first = original[0]
if len(original) > 0 and original.isalpha():
if first == "a" or first == "i" or first == "e" or first == "o" or first == "u" or first == "A" or first == "I" or first == "E" or first == "O" or first == "U" :
print new_wordV
else:
print new_wordC
else:
print 'empty'
Can this be made to look easier/less lines of code? If so could you give me some pointers what I could do(don't do it for me) Because I once posted something here 5+ lines and it was all done in like 2 :O. Especially the line with all the first==, it bugs me. I tried messing around a bit but nothing worked. Also I'd like to add coding yourself(mostly) is really fun, I just spent 10 minutes pressing in random words and I was amazed at how it worked haha.
I don't know enough python to tell you the exact code, but for your "first == ..." line, i prefer to use arrays and then a function like indexof() or in_array() or whatever it might be called in python. In your specific case, the string "aieouAIEOU" with a string indexof() or strpos() function would also work.
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On December 04 2012 05:18 Kambing wrote:Show nested quote +On December 04 2012 05:04 Recognizable wrote:original = raw_input('Enter a word:')
word = original.lower()
pyg = 'ay'
new_wordV = word+pyg #w/Vowel
new_wordC = original[1:]+word[0]+pyg #w/Consonant
first = original[0]
if len(original) > 0 and original.isalpha():
if first == "a" or first == "i" or first == "e" or first == "o" or first == "u" or first == "A" or first == "I" or first == "E" or first == "O" or first == "U" :
print new_wordV
else:
print new_wordC
else:
print 'empty'Can this be made to look easier/less lines of code? If so could you give me some pointers what I could do(don't do it for me) Because I once posted something here 5+ lines and it was all done in like 2 :O. Especially the line with all the first==, it bugs me. I tried messing around a bit but nothing worked. (1) Don't use locals unless its necessary. In particular, you shouldn't need to pre-compute new_wordV and new_wordC until you actually need them (i.e., inside of the if-statement). (2) The inner if-guard can be greatly simplified by using lower() as well as set inclusion (e.g., x in [1, 2, 3]) rather than repeated equality checks.
1) and 2) Do you mean this?
vowels=["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"]
original = raw_input('Enter a word:').lower()
if len(original) > 0 and original.isalpha():
if original[0]in vowels:
print original()+"ay"
else:
print original[1:]+original[0]+"ay"
else:
print 'empty'
I don't know enough python to tell you the exact code, but for your "first == ..." line, i prefer to use arrays and then a function like indexof() or in_array() or whatever it might be called in python. In your specific case, the string "aieouAIEOU" with a string indexof() or strpos() function would also work.
I understand some of these words ^.^
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On December 04 2012 05:04 Recognizable wrote:
original = raw_input('Enter a word:')
word = original.lower()
pyg = 'ay'
new_wordV = word+pyg #w/Vowel
new_wordC = original[1:]+word[0]+pyg #w/Consonant
first = original[0]
if len(original) > 0 and original.isalpha():
if first == "a" or first == "i" or first == "e" or first == "o" or first == "u" or first == "A" or first == "I" or first == "E" or first == "O" or first == "U" :
print new_wordV
else:
print new_wordC
else:
print 'empty'
Can this be made to look easier/less lines of code? If so could you give me some pointers what I could do(don't do it for me) Because I once posted something here 5+ lines and it was all done in like 2 :O. Especially the line with all the first==, it bugs me. I tried messing around a bit but nothing worked. Also I'd like to add coding yourself(mostly) is really fun, I just spent 10 minutes pressing in random words and I was amazed at how it worked haha.
+ Show Spoiler +
word = raw_input("Enter a word: ").lower()
if (not word.isalpha()) or word.isspace():
print "Invalid input for word generation"
else:
vowels_lowercase = ["a", "e", "i", "o", "u"]
pyg = "ay"
if word[0] in vowels_lowercase: #word with first letter as vowel
print word+pyg
else: #word with first letter as consonant
print word[1:]+word[0]+pyg
raw_input()
I don't remember how pig latin works so there could be some optimizations beyond this with more knowledge of exactly the rules.
You use "in" to automatically check for the existence of something in a list.
You do the exception handling at the beginning of the code.
You use the isalpha() and isspace() functions on strings to make it more verbose. (netherh said isspace() is in isalpha()? lolol) (oh, isalpha checks for empty string, not spaces. kk xD) (wait no I still think isspace() might be unnecessary, better safe than sorry?)
You use not isalpha() because it makes a lot more sense and is verbose as an exception handler; if it's not alphabetical, then it's an exception, instead of having just an "else" for everything.
You put the variables in the scope in which they're used, so if you don't use them, you didn't create them needlessly.
You can use sequences of string methods like lower() and upper() in one line.
If you've already used lower() on a string, it can't possibly have uppercase letters, right? So no need to check for those.
On December 04 2012 05:51 Recognizable wrote:Show nested quote +I don't know enough python to tell you the exact code, but for your "first == ..." line, i prefer to use arrays and then a function like indexof() or in_array() or whatever it might be called in python. In your specific case, the string "aieouAIEOU" with a string indexof() or strpos() function would also work. I understand some of these words ^.^
They're not really relevant for this situation. They look for characters in strings, which is different from this problem. The same thing for indexof() and strpos() is find() in Python. I'm not exactly sure what indexof() is though. I assume it's the same as strpos().
Python has some beautiful special things you should use. Using the "element in list" code automatically makes your life so much nicer.
Your ultimate goal in Python is writing really succinct and verbose code. Something Python programmers love is that your Python code can be read like a book if you write it really well.
@netherh, <insert huge debate about returning early versus else propagation> :D
also, oops, you caught my bad habit of putting those list catchers as globals.
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On December 04 2012 05:30 Morfildur wrote:I don't know enough python to tell you the exact code, but for your "first == ..." line, i prefer to use arrays and then a function like indexof() or in_array() or whatever it might be called in python. In your specific case, the string "aieouAIEOU" with a string indexof() or strpos() function would also work.
That's not Python jargon. You are probably talking about lists.
Well someone posted his solution any way.
Make sure to go through the tutorial, especially control flow tools, data structures etc.
And please get used to PEP 8, especially the maximum line length, which does make sense and the naming conventions.
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On December 04 2012 05:04 Recognizable wrote:
original = raw_input('Enter a word:')
word = original.lower()
pyg = 'ay'
new_wordV = word+pyg #w/Vowel
new_wordC = original[1:]+word[0]+pyg #w/Consonant
first = original[0]
if len(original) > 0 and original.isalpha():
if first == "a" or first == "i" or first == "e" or first == "o" or first == "u" or first == "A" or first == "I" or first == "E" or first == "O" or first == "U" :
print new_wordV
else:
print new_wordC
else:
print 'empty'
Can this be made to look easier/less lines of code? If so could you give me some pointers what I could do(don't do it for me) Because I once posted something here 5+ lines and it was all done in like 2 :O. Especially the line with all the first==, it bugs me. I tried messing around a bit but nothing worked. Also I'd like to add coding yourself(mostly) is really fun, I just spent 10 minutes pressing in random words and I was amazed at how it worked haha.
What Kambing said. Note that you're not really consistent with your lower / upper case between vowel / consonant versions due to using original[1: ] in one, and word in the other (kinda nitpicking, but thought I'd point it out). You also access word[0] before checking if it's empty.
Personally I'd go with this (python 3.x):
original = input('Enter a word: ').lower()
if not original.isalpha() or original.isspace():
print("invalid")
return
vowels = ["a", "e", "i", "o", "u"]
pyg = "ay"
if original[0] in vowels:
print(original + pyg)
else:
print(original[1:] + original[0] + pyg)
Note that the isalpha() check also catches empty strings. 
@Blisse: haha. XD (*steals your isspace check*).
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So many ways to write something, I'm kinda confused. On another note, can anyone recommend a good book for learning to program?
vowels=["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"]
original = raw_input('Enter a word:').lower()
if len(original) > 0 and original.isalpha():
if original[0]in vowels:
print original()+"ay"
else:
print original[1:]+original[0]+"ay"
else:
print 'empty'
This is what I ended up with, anyway I have to go sleep.
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On December 04 2012 06:26 Recognizable wrote:So many ways to write something, I'm kinda confused. On another note, can anyone recommend a good book for learning to program?
vowels=["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"]
original = raw_input('Enter a word:').lower()
if len(original) > 0 and original.isalpha():
if original[0]in vowels:
print original()+"ay"
else:
print original[1:]+original[0]+"ay"
else:
print 'empty'
This is what I ended up with, anyway I have to go sleep.
There are always a lot of ways to write something; there is no "best way." It always depends on what you want to achieve with your code.
However, there are a lot of "bad ways."
One such way is writing code with lots of redundancies and it's always frowned upon.
For example, if you call lower() on a string, then you check if the string has any uppercase letters. It even sounds redundant, no? as how can a lower cased string have uppercase letters anyways?
Using len(word) > 0 is redundant if you also have a isalpha() check, since isalpha fails on empty strings. (I think isspace() is unnecessary though and I'm not sure if isalpha() fails for sentences with spaces in them, as our assumption is this program will only be fed words and not strings.)
So those are some good practices.
Other good practices is also making use of special functions inside the programming language you're working on; in this example, "element in list", instead of writing your own ways to check it, like where you used "first_letter == ... ".
In Python, the favourite practice is usually make your code as verbose and succinct as possible. Make it highly readable, but also very short and sweet. If I read through any part of your code, it should be obvious what you're doing, but also that your way of doing that is the fastest and most maintainable way to do it.
When we reversed your if...else position, we did it because now it's perfectly clear when you handle your errors and what you determined are errors. They're in the same block of code.
The best way to learn is actually just to code a lot a lot in the language, write lots of mini-programs, keep up-to-date knowledge of the language, and look at good stacks exchange solutions to your problems and why they're good.
If you want to learn about programming in general, scope, exceptions and such, there are some books, but best practices come from just writing a lot of code, and debugging your horrible code when it doesn't work.
tl;dr It's a lot more about understanding why you would use one piece of code instead of an another.
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On December 03 2012 20:10 Tobberoth wrote:Show nested quote +On December 03 2012 19:36 teamamerica wrote:On December 03 2012 08:42 Morfildur wrote:On December 03 2012 08:24 darkness wrote:On December 03 2012 06:09 Fyodor wrote:On December 03 2012 05:56 darkness wrote:
Java: Is it possible to send output across the network to every user within a linked a list? If yes, how? I've tried some google search, but I found nothing. for each loop? I'm not sure I understand at what level your problem is. Some users are added to a linked list. I want to deliver a msg to all of them. They're all connected. loop is ok, but how do I make sure everyone receives the message? E.g. out.println("text") doesn't ask for receiver. That depends on what you want to send it through... Post more code! Put it on github and link for easiness. On December 03 2012 18:51 Arnstein wrote:
What does a <> b mean in Python?
Did they just stick this in there for people coming from php (it's not exactly the same thing in php but it's close - in php it checks for !equality after implicit type conversions), or is there another language they're both getting this syntax from? <> Is used in both SQL and Visual basic.
And is very annoying when you've been working in these languages for so long that when you switch to something else you've forgotten other languages use != and can't figure out why your code won't compile. ~_~
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On December 03 2012 08:42 Morfildur wrote:Show nested quote +On December 03 2012 08:24 darkness wrote:On December 03 2012 06:09 Fyodor wrote:On December 03 2012 05:56 darkness wrote:
Java: Is it possible to send output across the network to every user within a linked a list? If yes, how? I've tried some google search, but I found nothing. for each loop? I'm not sure I understand at what level your problem is. Some users are added to a linked list. I want to deliver a msg to all of them. They're all connected. loop is ok, but how do I make sure everyone receives the message? E.g. out.println("text") doesn't ask for receiver. That depends on what you want to send it through...
out = new PrintWriter
(new OutputStreamWriter(client.getOutputStream()));
Does that help? I'd like to send out.println(); to every user that is connected atm. No idea how to do it.
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Can someone explain the use of rand() and srand() in (not objective or ++)C programming to me? I'm very confused as to how I should use it properly, and my google searches on these have lead to nothing that I fully understood. The use of this will be in the rolling of a 6-sided dice 60 times so it would help to also learn how to make it only output random integers from 1-6.
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On December 04 2012 09:47 3FFA wrote:
Can someone explain the use of rand() and srand() in (not objective or ++)C programming to me? I'm very confused as to how I should use it properly, and my google searches on these have lead to nothing that I fully understood. The use of this will be in the rolling of a 6-sided dice 60 times so it would help to also learn how to make it only output random integers from 1-6.
if i am not mistaken:
rand() is a pseudo random generator i.e it follows a "formula" to create random number thus the pseudo. Usually the basic formula consists of simple addition, multiplication and shifts.
srand is used to tell where in the list of the "random" numbers to start from in its VERY long list of numbers (for example: tell it to start the "random" generator at the 7th number)
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On December 04 2012 09:47 3FFA wrote:
Can someone explain the use of rand() and srand() in (not objective or ++)C programming to me? I'm very confused as to how I should use it properly, and my google searches on these have lead to nothing that I fully understood. The use of this will be in the rolling of a 6-sided dice 60 times so it would help to also learn how to make it only output random integers from 1-6.
Yeah, there's a huge random number table that C uses to pull numbers from (compiler specific). Rand pulls a number from this table and increments the current table pointer. srand seeds the pointer to this table, which means it sets the index pointer to a randomized location, a very randomized location. So in order to generate "random" seeds your program needs a clever way of seeding the PRNG (psuedo-random number generator) on program start.
http://www.randygaul.net/2010/11/02/prngs-pseudo-random-number-generator/
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On December 04 2012 06:48 Blisse wrote:Show nested quote +On December 04 2012 06:26 Recognizable wrote:So many ways to write something, I'm kinda confused. On another note, can anyone recommend a good book for learning to program?
vowels=["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"]
original = raw_input('Enter a word:').lower()
if len(original) > 0 and original.isalpha():
if original[0]in vowels:
print original()+"ay"
else:
print original[1:]+original[0]+"ay"
else:
print 'empty'
This is what I ended up with, anyway I have to go sleep. There are always a lot of ways to write something; there is no "best way." It always depends on what you want to achieve with your code. However, there are a lot of "bad ways." One such way is writing code with lots of redundancies and it's always frowned upon. For example, if you call lower() on a string, then you check if the string has any uppercase letters. It even sounds redundant, no? as how can a lower cased string have uppercase letters anyways? Using len(word) > 0 is redundant if you also have a isalpha() check, since isalpha fails on empty strings. (I think isspace() is unnecessary though and I'm not sure if isalpha() fails for sentences with spaces in them, as our assumption is this program will only be fed words and not strings.) So those are some good practices. Other good practices is also making use of special functions inside the programming language you're working on; in this example, "element in list", instead of writing your own ways to check it, like where you used "first_letter == ... ". In Python, the favourite practice is usually make your code as verbose and succinct as possible. Make it highly readable, but also very short and sweet. If I read through any part of your code, it should be obvious what you're doing, but also that your way of doing that is the fastest and most maintainable way to do it. When we reversed your if...else position, we did it because now it's perfectly clear when you handle your errors and what you determined are errors. They're in the same block of code. The best way to learn is actually just to code a lot a lot in the language, write lots of mini-programs, keep up-to-date knowledge of the language, and look at good stacks exchange solutions to your problems and why they're good. If you want to learn about programming in general, scope, exceptions and such, there are some books, but best practices come from just writing a lot of code, and debugging your horrible code when it doesn't work. tl;dr It's a lot more about understanding why you would use one piece of code instead of an another.
I understand the redundancies, silly of me. What do you mean by element in list? IF, ELSE, makes sense. Thanks. I already have an idea for something I'd like to program. But first I am going to finish the python codeacademy courses before I start.
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On December 04 2012 20:04 Recognizable wrote:Show nested quote +On December 04 2012 06:48 Blisse wrote:On December 04 2012 06:26 Recognizable wrote:So many ways to write something, I'm kinda confused. On another note, can anyone recommend a good book for learning to program?
vowels=["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"]
original = raw_input('Enter a word:').lower()
if len(original) > 0 and original.isalpha():
if original[0]in vowels:
print original()+"ay"
else:
print original[1:]+original[0]+"ay"
else:
print 'empty'
This is what I ended up with, anyway I have to go sleep. There are always a lot of ways to write something; there is no "best way." It always depends on what you want to achieve with your code. However, there are a lot of "bad ways." One such way is writing code with lots of redundancies and it's always frowned upon. For example, if you call lower() on a string, then you check if the string has any uppercase letters. It even sounds redundant, no? as how can a lower cased string have uppercase letters anyways? Using len(word) > 0 is redundant if you also have a isalpha() check, since isalpha fails on empty strings. (I think isspace() is unnecessary though and I'm not sure if isalpha() fails for sentences with spaces in them, as our assumption is this program will only be fed words and not strings.) So those are some good practices. Other good practices is also making use of special functions inside the programming language you're working on; in this example, "element in list", instead of writing your own ways to check it, like where you used "first_letter == ... ". In Python, the favourite practice is usually make your code as verbose and succinct as possible. Make it highly readable, but also very short and sweet. If I read through any part of your code, it should be obvious what you're doing, but also that your way of doing that is the fastest and most maintainable way to do it. When we reversed your if...else position, we did it because now it's perfectly clear when you handle your errors and what you determined are errors. They're in the same block of code. The best way to learn is actually just to code a lot a lot in the language, write lots of mini-programs, keep up-to-date knowledge of the language, and look at good stacks exchange solutions to your problems and why they're good. If you want to learn about programming in general, scope, exceptions and such, there are some books, but best practices come from just writing a lot of code, and debugging your horrible code when it doesn't work. tl;dr It's a lot more about understanding why you would use one piece of code instead of an another. I understand the redundancies, silly of me. What do you mean by element in list? IF, ELSE, makes sense. Thanks. I already have an idea for something I'd like to program. But first I am going to finish the python codeacademy courses before I start.
He means what you proposed above with
original[0] in ['a', 'e', 'i', 'o', 'u']
Using list inclusion is an more concise and idiomatic way (i.e., what Python experts would do) to express an equality check among several options. For example, these two pieces of code are equivalent:
if response.lower() == 'yes' or response.lower() == ' no':
and
if response.lower() in ['yes', 'no']:
But the second is preferred in Python.
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Ok, I figured it was that, I just wanted a more elaborate explanation. Thank you. I have almost zero knowledge of programming terminology. I'll slowly learn I guess.
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Hey guys,
I'm very rusty with Java programming, but I cannot figure out my issue. I wrote a class that connects to a relational database and because I can potentially use various JDBC drivers, I went for a Class.forName() rather than an import.
In my code I use :
Class.forName(this.properties.getDriver());
and this.properties.getDriver() returns "com.microsoft.sqlserver.jdbc.SQLServerDriver"
I compiled using -cp and the correct path to the sqljdbc.jar file.
During execution I get a classNotFoundException com.microsoft.sqlserver.jdbc.SQLServerDriver
I tried to use import com.microsoft.sqlserver.jdbc.SQLServerDriver; at the beginning of the code and it compiles without error, so that proves I link to sqljdbc.jar correctly during compilation right ?
Thanks
edit : I compiled with Netbeans and it works, still don't get what I did wrong earlier o_o
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Hi guys,
So next semester, I will be learning Python as part of a Comp Sci class I'll be taking. At the end of the class, we'll have to make a project primarily in Python. I've heard about this from my friends who're taking it now, so I've started contemplating the project. One of the thoughts I had was making an AI of sorts to play BW. It'd probably work through BWAPI. The problem is, a lot of my friends also say Python is too slow to be able to make the calculations for a game AI.
Anyway, I'd just like some opinions on if it'd be possible to build a BW AI-bot in python.
Thanks!
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EPT
