Le Wed, 20 May 2009 18:25:07 -0700 (PDT),
Doug Reid <rnrcr...@yahoo.com> s'exprima ainsi:
> "The next line in the loop,
> word = word[:position] + word[(position + 1):]
>
> creates a new version of word minus the one letter at position position.
> Using slicing, the computer creates two new strings from word. The first
> slice, word[:position], is every letter up to, but not including,
> word[position]. The next slice, word[(position + 1):], is every letter
> after word[position]. These two string are joined together and assigned to
> word, which is now equal to its old self, minus the one letter
> word[position]."
>Can someone explain this in simpler terms? I'm sorry this
> is so lengthy for my first post:)
It's confusing because abstract and without any example. In the case you wrote
where the word is "python", the letter 'y', and so the position is 1, you get:
word "python"
word[:position] "p"
word[position+1:] "thon"
glued together "pthon"
Also, a confusing part of the program id the loop header:
while word:
position = random.randrange(len(word))
jumble += word[position]
word = word[:position] + word[(position + 1):]
In python, a container such as a string is considered 'False' when it's empty.
Right? So that the loop header above is equivalent to:
while len(word) > 0:
and the loop will stop when every letter has been extracted from the word.
Denis
------
la vita e estrany
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