anonymous
  • anonymous
Question on PS3 #4. I have run into an issue with the first part of my play_hand function. I was successful running the harness test functions for the first 3 functions. When I run the code (pasted in the link below) and enter an invalid word, I cannot escape the "if not... " part of the function. I know that my solution is not correct but I want to know why I can't escape the "if not..." part of the function when I enter an invalid word. I am not as concerned with the solution to the actual problem #4. http://pastebin.com/RjU6Y4QF
MIT 6.00 Intro Computer Science (OCW)
katieb
  • katieb
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anonymous
  • anonymous
Just to clarify. My problem is that when I enter an invalid word, I get prompted to enter a new word. Ok so far so good. But even if that new word is valid, the error message about entering an invalid word is returned. In other words I can't enter a valid word if I first enter an invalid one.
anonymous
  • anonymous
i'm getting a sytax error for the break - i is not 'in' a loop i commented out the break and it worked for me http://dpaste.com/802363/
anonymous
  • anonymous
I tried taking out the break and here is the result that I got: http://pastebin.com/Ff1Z00UJ So when I enter an invalid word, those letters are removed from the hand and I can't use them to make a new valid word. I don't know why this is happening. My get_word_score, update_hand, and valid_word functions all passed their harness tests. Can anyone provide any insight as to why this is happening?

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anonymous
  • anonymous
A few things to consider: 1. include all the code, so we don't have to hunt 2. play_hand isn't returning anything, maybe it should? 3. an if should generally have a else statement 4. its probable that is_valid_word never returns True
anonymous
  • anonymous
i put your play_hand() function into my ps3 solution and i did not experience the symptom you described. i gave it several invalid words and it did not remove any letters from hand. I don't see how that could possbly happen with the code from your original post - that function does not do anything other than ask for a word over and over till it gets a valid word then just stops - http://dpaste.com/803364/
anonymous
  • anonymous
I had this same problem originally. The test harness will pass but when you implement play_hand the "hand" gets mutated when you send it to "is_valid_word" so you need to use something like "temp_hand=hand.copy()" at the start of your "play_hand" and send "temp_hand" instead of "hand".
anonymous
  • anonymous
Msmithhnova I think you are probably correct. However I am still having trouble. I just looked at the solution code for PS3 and I am having trouble running #4.
anonymous
  • anonymous
What is it doing or not doing? Also, it would likely be easiest to assist you if you were to post your ps3a.py on one of the code sites.

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