On Thu, 25 Oct 2007 07:52:36 -0700, Abandoned wrote:
> Hi..
> I want to delete all now allowed characters in my text. I use this
> function:
>
> def clear(s1=""):
> if s1:
> allowed =
> [u'+',u'0',u'1',u'2',u'3',u'4',u'5',u'6',u'7',u'8',u'9',u' ', u'Ş',
> u'ş', u'Ö', u'ö', u'Ü', u'ü', u'Ç', u'ç', u'İ', u'ı', u'Ğ', u'ğ', 'A',
> 'C', 'B', 'E', 'D', 'G', 'F', 'I', 'H', 'K', 'J', 'M', 'L', 'O', 'N',
> 'Q', 'P', 'S', 'R', 'U', 'T', 'W', 'V', 'Y', 'X', 'Z', 'a', 'c', 'b',
> 'e', 'd', 'g', 'f', 'i', 'h', 'k', 'j', 'm', 'l', 'o', 'n', 'q', 'p',
> 's', 'r', 'u', 't', 'w', 'v', 'y', 'x', 'z']
> s1 = "".join(ch for ch in s1 if ch in allowed) return s1
You don't need to make allowed a list. Make it a string, it is easier to
read.
allowed = u'+0123456789 ŞşÖöÜüÇçİıĞğ' \
u'ACBEDGFIHKJMLONQPSRUTWVYXZacbedgfihkjmlonqpsrutwvyxz'
> ....And my problem this function replace the character to "" but i want
> to " "
> for example:
> input: Exam%^^ple
> output: Exam ple
I think the most obvious way is this:
def clear(s):
allowed = u'+0123456789 ŞşÖöÜüÇçİıĞğ' \
u'ACBEDGFIHKJMLONQPSRUTWVYXZacbedgfihkjmlonqpsrutwvyxz'
L = []
for ch in s:
if ch in allowed: L.append(ch)
else: L.append(" ")
return ''.join(s)
Perhaps a better way is to use a translation table:
def clear(s):
allowed = u'+0123456789 ŞşÖöÜüÇçİıĞğ' \
u'ACBEDGFIHKJMLONQPSRUTWVYXZacbedgfihkjmlonqpsrutwvyxz'
not_allowed = [i for i in range(0x110000) if unichr(i) not in allowed]
table = dict(zip(not_allowed, u" "*len(not_allowed)))
return s.translate(table)
Even better is to pre-calculate the translation table, so it is
calculated only when needed:
TABLE = None
def build_table():
global TABLE
if TABLE is None:
allowed = u'+0123456789 ŞşÖöÜüÇçİıĞğ' \
u'ACBEDGFIHKJMLONQPSRUTWVYXZacbedgfihkjmlonqpsrutwvyxz'
not_allowed = \
[i for i in range(0x110000) if unichr(i) not in allowed]
TABLE = dict(zip(not_allowed, u" "*len(not_allowed)))
return TABLE
def clear(s):
return s.translate(build_table())
The first time you call clear(), it will take a second or so to build the
translation table, but then it will be very fast.
--
Steven.
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