"Alex Feddor" <[email protected]> wrote
I am looking for method enables advanced text string search. Method
string.find() or re module seems no supporting what I am looking for.
The
idea is as follows:
The re module almost certainly can do what you want but regex
are notoriously hard to master and often obscure.
Text ="FDA meeting was successful. New drug is approved for whole sale
distribution!"
Example 01:
search criteria: "FDA" AND ( "approve*" OR "supported")
The regex will search for FDA followed by either approve or supported.
There is no AND operator in regex since AND just implies a sequence
within the string. There is an OR operator however which is '|'
The catch is that in Text variable FDA and approve words are not one
after
another (other words are in between).
And regex allows for you to specify a sequence of anything after FDA
Example 02:
search criteria: "Ben"
The catch is that code sould find only exact Ben words not also words
which
that has firts three letters Ben such as Benquick, Benseek etc.. Only Ben
is
the right word we are looking for.
And again regex provides ways of ensuring an exact match.
I would really appreciated your advice - code sample / links how above
can
be achieved! if possible I would appreciated solution achieved with free
of
charge module.
You need to go through one of the many regex tutorials to understand
what can be done with these extremely powerful search tools (and
what can't!) There is a very basic introduction in my tutorial which
unfortunately doesn't cover all that you need here but might be a
good starting point.
The python HOWTO is another good start and goes a bit deeper
with a different approach:
http://docs.python.org/howto/regex.html
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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