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Code Issues Releases Wiki Activity

Better re.split examples.

This commit is contained in:
Georg Brandl 2007-12-06 09:45:39 +00:00
parent 2b92f6bab3
commit d6b20dc54f
1 changed files with 17 additions and 11 deletions
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Doc/library/re.rst
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@ -1091,16 +1091,21 @@ method is invaluable for converting textual data into data structures that can b
easily read and modified by Python as demonstrated in the following example that
creates a phonebook.
First, get the input using triple-quoted string syntax::
First, here is the input. Normally it may come from a file, here we are using
triple-quoted string syntax::
>>> input = """Ross McFluff 834.345.1254 155 Elm Street
Ronald Heathmore 892.345.3428 436 Finley Avenue
Frank Burger 925.541.7625 662 South Dogwood Way
Heather Albrecht 548.326.4584 919 Park Place"""
>>> input = """Ross McFluff: 834.345.1254 155 Elm Street
Then, convert the string into a list with each line having its own entry::
Ronald Heathmore: 892.345.3428 436 Finley Avenue
Frank Burger: 925.541.7625 662 South Dogwood Way
>>> entries = re.split("\n", input)
Heather Albrecht: 548.326.4584 919 Park Place"""
The entries are separated by one or more newlines. Now we convert the string
into a list with each nonempty line having its own entry::
>>> entries = re.split("\n+", input)
>>> entries
['Ross McFluff 834.345.1254 155 Elm Street',
'Ronald Heathmore 892.345.3428 436 Finley Avenue',
@ -1111,16 +1116,17 @@ Finally, split each entry into a list with first name, last name, telephone
number, and address. We use the ``maxsplit`` paramater of :func:`split`
because the address has spaces, our splitting pattern, in it::
>>> [re.split(" ", entry, 3) for entry in entries]
>>> [re.split(":? ", entry, 3) for entry in entries]
[['Ross', 'McFluff', '834.345.1254', '155 Elm Street'],
['Ronald', 'Heathmore', '892.345.3428', '436 Finley Avenue'],
['Frank', 'Burger', '925.541.7625', '662 South Dogwood Way'],
['Heather', 'Albrecht', '548.326.4584', '919 Park Place']]
With a ``maxsplit`` of ``4``, we could seperate the house number from the street
name::
The ``:?`` pattern matches the colon after the last name, so that it does not
occur in the result list. With a ``maxsplit`` of ``4``, we could seperate the
house number from the street name::
>>> [re.split(" ", entry, 4) for entry in entries]
>>> [re.split(":? ", entry, 4) for entry in entries]
[['Ross', 'McFluff', '834.345.1254', '155', 'Elm Street'],
['Ronald', 'Heathmore', '892.345.3428', '436', 'Finley Avenue'],
['Frank', 'Burger', '925.541.7625', '662', 'South Dogwood Way'],