I am brand-new to Python, and this is my first post on DaniWeb. Seems like a positive community, and I hope one day to contribute as a knowledgable expert and not a world-class newbie.

I'm wanting to create a simple python program that "fakes" Shakespeare or haiku-style output. I realize actual poems are more a matter of syllables, but I'm just getting my toes wet.

I want to create a program that can take an example.txt file of plain text and output its contents in either 10-word lines or in 7-5-7 word lines; the number of words in a line is arbitrary.

7 Years
Discussion Span
Last Post by pyTony

Just re-splitting in the same order, based on the word count, yeah.


I would do something like this, don't be shy of starting to use yield to generate answers instead of making one time use lists without purpose.

bookfile = '11.txt'
pattern = (7, 5, 7)

def nwords(book, nwords):
    for dontcare in range(nwords):
        ## give word from begining (0) and remove from list of words one by one
        yield book.pop(0)
    ## finish giving words after nwords has been given 

with open(bookfile) as thebook:
    # read text of book and split from white space
    bookaslist =  thebook.read().split()
    # until bookaslist is empty, which is considered False value
    while bookaslist:
        for count in pattern:
            # rejoin count words and center it for 60 column print
            print ' '.join(nwords(bookaslist, count)).center(60)
        # empty line between to clarify the form

Edited by pyTony: n/a

Project Gutenberg's Alice's Adventures in Wonderland, by Lewis Carroll

This eBook is for the use of anyone anywhere at no cost and with
almost no restrictions whatsoever.  You may copy it, give it away or
re-use it under the terms of the Project Gutenberg License included
with this eBook or online at www.gutenberg.org

Title: Alice's Adventures in Wonderland

Author: Lewis Carroll

Posting Date: June 25, 2008 [EBook #11]
Release Date: March, 1994

Language: English

Character set encoding: ASCII



Lewis Carroll


CHAPTER I. Down the Rabbit-Hole

Alice was beginning to get very tired of sitting by her sister on the
bank, and of having nothing to do: once or twice she had peeped into the
book her sister was reading, but it had no pictures or conversations in
it, 'and what is the use of a book,' thought Alice 'without pictures or

So she was considering in her own mind (as well as she could, for the
hot day made her feel very sleepy and stupid), whether the pleasure
of making a daisy-chain would be worth the trouble of getting up and
picking the daisies, when suddenly a White Rabbit with pink eyes ran
close by her.

There was nothing so VERY remarkable in that; nor did Alice think it so
VERY much out of the way to hear the Rabbit say to itself, 'Oh dear!
Oh dear! I shall be late!' (when she thought it over afterwards, it
occurred to her that she ought to have wondered at this, but at the time
it all seemed quite natural); but when the Rabbit actually TOOK A WATCH
OUT OF ITS WAISTCOAT-POCKET, and looked at it, and then hurried on,
Alice started to her feet, for it flashed across her mind that she had
never before seen a rabbit with either a waistcoat-pocket, or a watch
to take out of it, and burning with curiosity, she ran across the field
after it, and fortunately was just in time to see it pop down a large
rabbit-hole under the hedge.

In another moment down went Alice after it, never once considering how
in the world she was to get out again.

The rabbit-hole went straight on like a tunnel for some way, and then
dipped suddenly down, so suddenly that Alice had not a moment to think
about stopping herself before she found herself falling down a very deep

Either the well was very deep, or she fell very slowly, for she had
plenty of time as she went down to look about her and to wonder what was
going to happen next. First, she tried to look down and make out what
she was coming to, but it was too dark to see anything; then she
looked at the sides of the well, and noticed that they were filled with
cupboards and book-shelves; here and there she saw maps and pictures
hung upon pegs. She took down a jar from one of the shelves as
she passed; it was labelled 'ORANGE MARMALADE', but to her great
disappointment it was empty: she did not like to drop the jar for fear
of killing somebody, so managed to put it into one of the cupboards as
she fell past it.

'Well!' thought Alice to herself, 'after such a fall as this, I shall
think nothing of tumbling down stairs! How brave they'll all think me at
home! Why, I wouldn't say anything about it, even if I fell off the top
of the house!' (Which was very likely true.)

Down, down, down. Would the fall NEVER come to an end! 'I wonder how
many miles I've fallen by this time?' she said aloud. 'I must be getting
somewhere near the centre of the earth. Let me see: that would be four
thousand miles down, I think--' (for, you see, Alice had learnt several
things of this sort in her lessons in the schoolroom, and though this
was not a VERY good opportunity for showing off her knowledge, as there
was no one to listen to her, still it was good practice to say it over)
'--yes, that's about the right distance--but then I wonder what Latitude
or Longitude I've got to?' (Alice had no idea what Latitude was, or
Longitude either, but thought they were nice grand words to say.)

Presently she began again. 'I wonder if I shall fall right THROUGH the
earth! How funny it'll seem to come out among the people that walk with
their heads downward! The Antipathies, I think--' (she was rather glad
there WAS no one listening, this time, as it didn't sound at all the
right word) '--but I shall have to ask them what the name of the country
is, you know. Please, Ma'am, is this New Zealand or Australia?' (and
she tried to curtsey as she spoke--fancy CURTSEYING as you're falling
through the air! Do you think you could manage it?) 'And what an
ignorant little girl she'll think me for asking! No, it'll never do to
ask: perhaps I shall see it written up somewhere.'

Down, down, down. There was nothing else to do, so Alice soon began
talking again. 'Dinah'll miss me very much to-night, I should think!'
(Dinah was the cat.) 'I hope they'll remember her saucer of milk at
tea-time. Dinah my dear! I wish you were down here with me! There are no
mice in the air, I'm afraid, but you might catch a bat, and that's very
like a mouse, you know. But do cats eat bats, I wonder?' And here Alice
began to get rather sleepy, and went on saying to herself, in a dreamy
sort of way, 'Do cats eat bats? Do cats eat bats?' and sometimes, 'Do
bats eat cats?' for, you see, as she couldn't answer either question,
it didn't much matter which way she put it. She felt that she was dozing
off, and had just begun to dream that she was walking hand in hand with
Dinah, and saying to her very earnestly, 'Now, Dinah, tell me the truth:
did you ever eat a bat?' when suddenly, thump! thump! down she came upon
a heap of sticks and dry leaves, and the fall was over.

Alice was not a bit hurt, and she jumped up on to her feet in a moment:
she looked up, but it was all dark overhead; before her was another
long passage, and the White Rabbit was still in sight, hurrying down it.
There was not a moment to be lost: away went Alice like the wind, and
was just in time to hear it say, as it turned a corner, 'Oh my ears
and whiskers, how late it's getting!' She was close behind it when she
turned the corner, but the Rabbit was no longer to be seen: she found
herself in a long, low hall, which was lit up by a row of lamps hanging
from the roof.

There were doors all round the hall, but they were all locked; and when
Alice had been all the way down one side and up the other, trying every
door, she walked sadly down the middle, wondering how she was ever to
get out again.

Suddenly she came upon a little three-legged table, all made of solid
glass; there was nothing on it except a tiny golden key, and Alice's
first thought was that it might belong to one of the doors of the hall;
but, alas! either the locks were too large, or the key was too small,
but at any rate it would not open any of them. However, on the second
time round, she came upon a low curtain she had not noticed before, and
behind it was a little door about fifteen inches high: she tried the
little golden key in the lock, and to her great delight it fitted!

Alice opened the door and found that it led into a small passage, not
much larger than a rat-hole: she knelt down and looked along the passage
into the loveliest garden you ever saw. How she longed to get out of
that dark hall, and wander about among those beds of bright flowers and
those cool fountains, but she could not even get her head through the
doorway; 'and even if my head would go through,' thought poor Alice, 'it
would be of very little use without my shoulders. Oh, how I wish I could
shut up like a telescope! I think I could, if I only know how to begin.'
For, you see, so many out-of-the-way things had happened lately,
that Alice had begun to think that very few things indeed were really

There seemed to be no use in waiting by the little door, so she went
back to the table, half hoping she might find another key on it, or at
any rate a book of rules for shutting people up like telescopes: this
time she found a little bottle on it, ('which certainly was not here
before,' said Alice,) and round the neck of the bottle was a paper
label, with the words 'DRINK ME' beautifully printed on it in large

It was all very well to say 'Drink me,' but the wise little Alice was
not going to do THAT in a hurry. 'No, I'll look first,' she said, 'and
see whether it's marked "poison" or not'; for she had read several nice
little histories about children who had got burnt, and eaten up by wild
beasts and other unpleasant things, all because they WOULD not remember
the simple rules their friends had taught them: such as, that a red-hot
poker will burn you if you hold it too long; and that if you cut your
finger VERY deeply with a knife, it usually bleeds; and she had never
forgotten that, if you drink much from a bottle marked 'poison,' it is
almost certain to disagree with you, sooner or later.

However, this bottle was NOT marked 'poison,' so Alice ventured to taste
it, and finding it very nice, (it had, in fact, a sort of mixed flavour
of cherry-tart, custard, pine-apple, roast turkey, toffee, and hot
buttered toast,) she very soon finished it off.

  *    *    *    *    *    *    *

    *    *    *    *    *    *

  *    *    *    *    *    *    *

'What a curious feeling!' said Alice; 'I must be shutting up like a

And so it was indeed: she was now only ten inches high, and her face
brightened up at the thought that she was now the right size for going
through the little door into that lovely garden. First, however, she
waited for a few minutes to see if she was going to shrink any further:
she felt a little nervous about this; 'for it might end, you know,' said
Alice to herself, 'in my going out altogether, like a candle. I wonder
what I should be like then?' And she tried to fancy what the flame of a
candle is like after the candle is blown out, for she could not remember
ever having seen such a thing.

After a while, finding that nothing more happened, she decided o

Wow, great start and great response. I am getting errors, though (Python 3.1 is what I'm compiling in)
At first I was getting this error:

File "/Users/jonmitten/Documents/workspace/LyndaPython3EssentialTraining/poemizer.py", line 24
    print ' '.join(nwords(bookaslist, count)).center(60)
SyntaxError: invalid syntax

After adding parathesis to

print ' '.join(nwords(bookaslist, count)).center(60))


print( ' '.join(nwords(bookaslist, count)).center(60)))

I get this error:

Traceback (most recent call last):
  File "/Users/jonmitten/Documents/workspace/LyndaPython3EssentialTraining/poemizer.py", line 24, in <module>
    print( ' '.join(nwords(bookaslist, count)).center(60))
  File "/Users/jonmitten/Documents/workspace/LyndaPython3EssentialTraining/poemizer.py", line 14, in nwords
    yield book.pop(0)
IndexError: pop from empty list

Ok the yield should be:

from __future__ import print_function

bookfile = '11.txt'
pattern = (7, 5, 7)

def nwords(book, nwords):
    for dontcare in range(nwords):
        ## give word from begining (0) and remove from list of words one by one
        if book:
             yield book.pop(0)
    ## finish giving words after nwords has been given 

with open(bookfile) as thebook:
    # read text of book and split from white space
    bookaslist =  thebook.read().split()
    # until bookaslist is empty, which is considered False value
    while bookaslist:
        for count in pattern:
            # rejoin count words and center it for 60 column print
            print(' '.join(nwords(bookaslist, count)).center(60))
        # empty line between to clarify the form

This means that it will return incorrect number of words from the end of the file, when the words finish at end of the file.

Edited by pyTony: n/a


Wow, very cool. I'm going to have to look over the yield method to see what you did there.

Thanks for the decent head-start :)


Yield is handy, but you can get sometimes confused with it. Main headaches is, that sometimes you think you are putting values to list, but you put generator of values or you forget that once generated the values of generator are lost, and finally that after generator finishes, it is empty and you must recreate it to start again.

Here is one infinite generator of numbers up from starting value. It can not be used in for loop without exit statement, because it has not exit condition. After each yield the state of function is saved and the execution continues forward to next result.

def countup(x):
    while True:
        yield x

countfrom10= countup(10)
for i in range(10):

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