Hi. This must be a simple command but I just can't find it in the
Phthon manual. How do I delete all items with a certain condition from
a list? For instance:
L=['a', 'b', 'c', 'a']
I want to delete all 'a's from the list.
But if L.remove('a') only deletes the first 'a'.
How do you delete all 'a
Thank you very much for all your replies. I actually used the while
loop as the data is not large. But I was looking for a simpler, built
in command, something like L.remove('a', all) or L.removeall('a').
Python has re.findall function, but why not removeall, so users have
to make up long lines of
Can somebody recommend a good parser that can be used in Python
programs? I need a parser with large grammar that can cover a large
amount of random texts.
Thank you very much.
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Thank you, Lie and Andrew for your help.
I have studied NLTK quite closely but its parsers seem to be only for
demo. It has a very limited grammar set, and even a parser that is
supposed to be "large" does not have enough grammar to cover common
words like "I".
I need to parse a large amount of t
Hello!
I need a program that accesses a parse tree based on the designated
words (terminals) within the tree. For instance, in:
I came a long way in changing my habit.
(ROOT
(S
(NP (PRP I))
(VP (VBD came)
(NP (DT a) (JJ long) (NN way))
(PP (IN in)
(S
(VP (
Thank you very much for this information. It seems to point me to the
right direction. However, I do not fully understand the flatten
function and its output. Some indices seem to be inaccurate. I tried
to find this function at nltk.tree.Tree.flatten, but it returns a
flattened tree, not a tuple.
Dear John Machin
So sorry about the typo. It should be: "the program should *see* that
the designated *words* are..."
"a long way" has two parentheses to the left -- (VP (DT -- before it
hits a separate group -- VBD came). If there are three parenthesis,
for instance (NP, this will means that wha
I am trying to get the index for the last occurrance of a sub string.
S = 'dab dab dab'
print S.find('ab')
1
This gives me the index for the first position of 'ab'.
But I need to index the last position of 'ab' here.
Is there a quick option for find that will do this, or do I have to
write a long
Dear Christian
Thank you so much! It works!
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