hi
can someone explain strip() for these : -
-
-
-
>>x='www.example.com'
- x.strip('cmowz.')
-
-
-
-
-
'example'
-
when i did this: -
-
-
-
>>x = 'abcd,words.words'
- x.strip(',.')
-
-
-
-
-
'abcd,words.words'
-
it does not strip off "," and "." .Why is this so?
thanks 6  2326  ei***********@yahoo.com wrote:
hi
can someone explain strip() for these :
-
-
-
>>>>x='www.example.com'
- x.strip('cmowz.')
-
-
-
-
-
'example'
-
when i did this:
-
-
-
>>>>x = 'abcd,words.words'
- x.strip(',.')
-
-
-
-
-
'abcd,words.words'
-
it does not strip off "," and "." .Why is this so?
thanks
strip strips from the ends.
pyx = '...,.,abcd,words.words,,,,.,.,.,.,'
pyx.strip(',.')
'abcd,words.words'
James
On Fri, 26 Jan 2007 21:33:47 -0800, eight02645999 wrote:
hi
can someone explain strip() for these :
-
-
-
>>>x='www.example.com'
- x.strip('cmowz.')
-
-
-
-
'example'
-
when i did this:
-
-
-
>>>x = 'abcd,words.words'
- x.strip(',.')
-
-
-
-
'abcd,words.words'
-
it does not strip off "," and "." .Why is this so?
thanks
Fascinating...
It gets weirder:
>>x.strip('s')
'abcd,words.word'
Why strip only the final s, not the earlier one?
>>x.strip('w')
'abcd,words.words'
>>x.strip('o')
'abcd,words.words'
>>x.strip('r')
'abcd,words.words'
Strips nothing.
>>x.strip('ba')
'cd,words.words'
Strips correctly.
>>x.strip('bwa')
'cd,words.words'
Strips the a and b but not the w.
>>x.strip('bwas')
'cd,words.word'
....and only one of the S's.
>>y = "bwas"
y.strip('bwas')
''
>>y = "bwasxyz"
y.strip('bwas')
'xyz'
And yet these work.
You know, I'm starting to think there may be a bug in the strip method...
either that or the documentation should say:
strip(...)
S.strip([chars]) -string or unicode
Return a copy of the string S with leading and trailing
whitespace removed.
If chars is given and not None, remove none, some or all characters in
chars instead. If chars is unicode, S will be converted to unicode
before stripping
*wink*
--
Steven.
Steven D'Aprano wrote:
On Fri, 26 Jan 2007 21:33:47 -0800, eight02645999 wrote:
>>hi
can someone explain strip() for these :
-
-
>>>>>x='www.example.com'
- >x.strip('cmowz.')
-
-
-
- 'example'
when i did this:
-
-
>>>>>x = 'abcd,words.words'
- >x.strip(',.')
-
-
-
- 'abcd,words.words'
it does not strip off "," and "." .Why is this so?
thanks
Fascinating...
It gets weirder:
>>>>x.strip('s')
'abcd,words.word'
Why strip only the final s, not the earlier one?
>>>>x.strip('w')
'abcd,words.words'
>>>>x.strip('o')
'abcd,words.words'
>>>>x.strip('r')
'abcd,words.words'
Strips nothing.
>>>>x.strip('ba')
'cd,words.words'
Strips correctly.
>>>>x.strip('bwa')
'cd,words.words'
Strips the a and b but not the w.
>>>>x.strip('bwas')
'cd,words.word'
...and only one of the S's.
>>>>y = "bwas"
y.strip('bwas')
''
>>>>y = "bwasxyz"
y.strip('bwas')
'xyz'
And yet these work.
You know, I'm starting to think there may be a bug in the strip method...
either that or the documentation should say:
strip(...)
S.strip([chars]) -string or unicode
Return a copy of the string S with leading and trailing
whitespace removed.
If chars is given and not None, remove none, some or all characters in
chars instead. If chars is unicode, S will be converted to unicode
before stripping
*wink*
At the risk of appearing that I didn't notice your *wink*, the operative
words in the docs would be "leading" and "trailing". But somehow I think
you knew that.
James
On Jan 27, 4:33 pm, eight02645...@yahoo.com wrote:
hi
can someone explain strip() for these :
- >>x='www.example.com'
-
-
-
>x.strip('cmowz.')'example'
-
-
-
-
According to the documentation (with emphasis added):
"""Return a copy of the string with the *leading* and *trailing*
characters removed."""
Looking at the leading edge: "w" is in the set to strip, so it is
removed. Same applies to another 2 "w"s and a dot. "e" is not in the
strip set so it stops.
At the trailing edge: "m", "o", "c" and dot are removed, then it stops
because there's another "e".
when i did this:
- >>x = 'abcd,words.words'
-
-
-
>x.strip(',.')'abcd,words.words'
-
-
-
-
it does not strip off "," and "." .Why is this so?
The comma and dot in your example are neither leading nor trailing.
The leading "a" is not in the set to strip, so nothing happens at the
front door.
The trailing "s" is not in the set to strip, so there's no back door
action either.
HTH,
John ei***********@yahoo.com a écrit :
hi
can someone explain strip() for these :
-
-
-
>>>>x='www.example.com'
- x.strip('cmowz.')
-
-
-
-
-
'example'
-
when i did this:
-
-
-
>>>>x = 'abcd,words.words'
- x.strip(',.')
-
-
-
-
-
'abcd,words.words'
-
it does not strip off "," and "." .Why is this so?
Probably because the Fine Manual(tm) says that str.strip() removes
heading and trailing chars ?
"""
bruno@bibi ~ $ python
Python 2.4.1 (#1, Jul 23 2005, 00:37:37)
[GCC 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)] on
linux2
Type "help", "copyright", "credits" or "license" for more information.
>>help(''.strip)
Help on built-in function strip:
strip(...)
S.strip([chars]) -string or unicode
Return a copy of the string S with leading and trailing
whitespace removed.
If chars is given and not None, remove characters in chars instead.
If chars is unicode, S will be converted to unicode before stripping
"""
You may want to try str.replace() instead:
"""
>>help(''.replace)
Help on built-in function replace:
replace(...)
S.replace (old, new[, count]) -string
Return a copy of string S with all occurrences of substring
old replaced by new. If the optional argument count is
given, only the first count occurrences are replaced.
>>'abcd,words.words'.replace(',', '').replace('.', '')
'abcdwordswords'
"""
thanks
HTH
On 26 Jan 2007 21:33:47 -0800, ei***********@yahoo.com wrote:
>hi
can someone explain strip() for these :
-
-
-
>>>x='www.example.com'
- x.strip('cmowz.')
-
-
-
-
'example'
when i did this:
-
-
-
>>>x = 'abcd,words.words'
- x.strip(',.')
-
-
-
-
'abcd,words.words'
it does not strip off "," and "." .Why is this so?
thanks
If you only have a couple of characters to deal with then use
replace(). Otherwise use string.translate() :
>>import string
x = 'abcd,words.words'
transform = string.maketrans(',.','..')
x = string.translate(x, transform)
x = x.replace('.','')
x
'abcdwordswords''
Dan This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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