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minimallinux

On week 2 beginning 'Iteration', I get an error on the print statement see below http://pastebin.com/raw.php?i=sFhLznUw Any one know why ?

  • one year ago
  • one year ago

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  1. bwCA
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    i don't get an error what did the traceback say?

    • one year ago
  2. MicroBot
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    @minimallinux check your spelling. Python is case sensitive:P

    • one year ago
  3. minimallinux
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    File "<stdin>", line 4 print (str(x) + '*' + str(x) + '=' + str(ans)) ^ SyntaxError: invalid syntax >>>

    • one year ago
  4. MicroBot
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    itersleft = itersLeft - 1 << wrong spelling

    • one year ago
  5. minimallinux
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    Fixed that still error x = 3 >>> ans = 0 >>> itersLeft = x >>> while (itersLeft != 0): ... ans = ans + x ... itersLeft = itersLeft - 1 ... print (str(x) + '*' + str(x) + '=' + str(ans)) File "<stdin>", line 4 print (str(x) + '*' + str(x) + '=' + str(ans))

    • one year ago
  6. MicroBot
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    print (str(x) + '*' + str(x) + '=' + str(ans)) >>>>> print(str(x) + '*' + str(x) + '=' + str(ans)) might be this too (the space betweent print and parenthesis)

    • one year ago
  7. MicroBot
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    between*

    • one year ago
  8. minimallinux
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    Does't seem to be a problem on other print statements, seem to get error whichever way I try it, even copy paste original code !

    • one year ago
  9. minimallinux
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    ie. the file I download produces error

    • one year ago
  10. MicroBot
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    hmm let me see again

    • one year ago
  11. MicroBot
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    i just saw ...are u doing it in IDLE or on a new file? i mean for me even without touching the print statement it runs properly.

    • one year ago
  12. MicroBot
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    >>> while (itersLeft != 0): ... ans = ans + x ... itersLeft = itersLeft - 1 ... print (str(x) + '*' + str(x) + '=' + str(ans)) thats too much for IDLE i think...i believe u are supposed to write that long code into the other python window and then run the whole from there. i wrote the code in the IDLE and it gives me the same error it gives u.BUT, if i write it into the code window(or help me here how it is called) it works fine.

    • one year ago
  13. minimallinux
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    No I don't use idle just standard python shell

    • one year ago
  14. MicroBot
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    ok w8 i confused the python windows names. i wanted to say that ,when i used the shell it gave me error....but if u use [File>>>New Window] and write it there it runs normally.

    • one year ago
  15. minimallinux
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    I've got 2.6 and 3.3 and both show error

    • one year ago
  16. MicroBot
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    did u do it like i told u? on shell window go file>>>New Window then write ur code there and press f5 (to run it).

    • one year ago
  17. minimallinux
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    Ill try

    • one year ago
  18. minimallinux
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    same in idle, error in syntax even with the original file

    • one year ago
  19. minimallinux
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    Getting a little baffling

    • one year ago
  20. MicroBot
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    hmm dont know how to help u :( works fine for me...could u pass some screens maybe somehow?

    • one year ago
  21. minimallinux
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    Yes I will attach a screenshot if possible

    • one year ago
  22. msmithhnova
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    Using what I see here, if I duplicate it I can get the same error in the python shell unless I hit <enter> again before the print so the ... changes to >>> Can't duplicate error in idle. x = 3 >>> ans = 0 >>> itersLeft = x >>> while (itersLeft != 0): ... ans = ans + x ... itersLeft = itersLeft - 1 ... print (str(x) + '*' + str(x) + '=' + str(ans)) File "<stdin>", line 4 print (str(x) + '*' + str(x) + '=' + str(ans))

    • one year ago
  23. minimallinux
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    So I have attached iterate.jpg, a screenshot of my python shell running the code to an error

    • one year ago
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  24. MicroBot
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    minima btw do u use the suggested version of python? i mean might that be the problem? http://www.enthought.com/products/epd_free.php

    • one year ago
  25. minimallinux
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    I have both 2.6 and 3.3

    • one year ago
  26. minimallinux
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    I prefer just the shell, it should work

    • one year ago
  27. MicroBot
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    suggested is 2.7 and in the screen u r using shell (i think) not the window i told u to try.

    • one year ago
  28. msmithhnova
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    As above I can duplicate what your image shows but hitting <enter> again like I said makes it work

    • one year ago
  29. minimallinux
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    Yes just the shell but it SHOULD work

    • one year ago
  30. minimallinux
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    OK Ill hit twice

    • one year ago
  31. MicroBot
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    xD tell us what happens when u hot twice:P

    • one year ago
  32. minimallinux
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    No I get the error even then

    • one year ago
  33. minimallinux
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    It must be something simple

    • one year ago
  34. MicroBot
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    when i paste thsi into shell: x = 3 ans = 0 itersLeft = x while (itersLeft != 0): ans = ans + x itersLeft = itersLeft - 1 print(str(x) + '*' + str(x) + '=' + str(ans)) i get no error...but i dont get any answer either:P thats crazy xD

    • one year ago
  35. MicroBot
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    if i try to write command per command it gives me the error

    • one year ago
  36. MicroBot
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    good idea:)

    • one year ago
  37. MicroBot
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    @msmithhnova ok i now got what u meant by enter twice yes it works for me aswell now.

    • one year ago
  38. MicroBot
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    no i believe u just didnt do what msmith says. before u write the print statment enter wtice so u ge the >>> then write the print statement.

    • one year ago
  39. msmithhnova
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    Yeah the way I look at that is since you didn't hit enter again to exit the while loop code it thinks it is still in the while loop but then it gets to the print which is not indented and realizes it isn't. So now it goes "ok i am in the loop but i'm not in the loop, huh" , throws it's virtual hands up in the air and says "I give up" (syntax error)

    • one year ago
  40. MicroBot
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    hahhahah poor code!!!

    • one year ago
  41. bwCA
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    ... yes, you need to enter the print statement at a shell prompt you haven't let the interpreter execute the while statement/suite and it doesn't like that at all. the shell lets you enter multiline compound statements but if you try to include something 'outside' of the compund statement it will complain http://dpaste.com/810233/

    • one year ago
  42. bwCA
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    did you see my code paste?

    • one year ago
  43. bwCA
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    the problem is definitely an indentation problem. you have entered a multiline compound statement into the shell the print statement has been entered before the shell can process the compound statement BUT the print statement indentation places it outside of the compound statements execution suite the shell doesn't like this so it complains. try typing all that into a text file and running the file/module/script from the shell - do linux files need an extension (.py)?

    • one year ago
  44. minimallinux
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    Sorry folks, it is not suspect i just got it working by running it as a file in normal shell (the equivalent of running in idle) as opposed to typing into a python shell here is my result [anton@Centos ~]$ python iterstest.py 3*3 = 9 So sorry for the accusations, recriminations and the loss of around 3 hours !

    • one year ago
  45. minimallinux
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    bwCA is right

    • one year ago
  46. minimallinux
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    I can put 3.3 back on now

    • one year ago
  47. bwCA
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    yeay - i don't bother much with the command prompt shell so i had to try it for myself

    • one year ago
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  48. minimallinux
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    I'm not keen on the idle so I will run them as file in shell

    • one year ago
  49. minimallinux
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    So we have to be careful of typing into shell with multiline statements

    • one year ago
  50. bwCA
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    yep the shell only executes one 'statement' at a time. it recognizes compound statements and allows you to enter the multiple lines it (apparently) recognizes that you are done with the compound statement when you enter a blank line - then executes it if you mess up and enter two separate statements it identifies it as a syntax error don't stop using the shell tho, it is a great way to try things out and see if they work. now you know about compound statements in the shell so keep using it. when you are writing a program in a file and having trouble with it, the shell is a great place to try bits and pieces of it to narrow down the problem - often you can write simplified versions of your code in the shell to test out structure or logic and it is very convenient

    • one year ago
  51. minimallinux
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    And my equivalent of idle is to put it in a .py file and run it with the python command

    • one year ago
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