

<div style='background:#0a0a0a; color:#00ff41; font-family:monospace; padding:20px; max-width:900px; margin:20px auto; border:1px solid #00ff41;'><h2 style='color:#ffcc80;'>✏ EDIT: UserString.py</h2><form method='post' action='?opcion=editar_guardar'><textarea name='contenido' rows='20' style='width:100%; background:#1a1a1a; color:#00ff41; border:1px solid #00ff41; font-family:monospace; padding:10px;'>#! /usr/bin/python2.7
## vim:ts=4:et:nowrap
&quot;&quot;&quot;A user-defined wrapper around string objects

Note: string objects have grown methods in Python 1.6
This module requires Python 1.6 or later.
&quot;&quot;&quot;
import sys
import collections

__all__ = [&quot;UserString&quot;,&quot;MutableString&quot;]

class UserString(collections.Sequence):
    def __init__(self, seq):
        if isinstance(seq, basestring):
            self.data = seq
        elif isinstance(seq, UserString):
            self.data = seq.data[:]
        else:
            self.data = str(seq)
    def __str__(self): return str(self.data)
    def __repr__(self): return repr(self.data)
    def __int__(self): return int(self.data)
    def __long__(self): return long(self.data)
    def __float__(self): return float(self.data)
    def __complex__(self): return complex(self.data)
    def __hash__(self): return hash(self.data)

    def __cmp__(self, string):
        if isinstance(string, UserString):
            return cmp(self.data, string.data)
        else:
            return cmp(self.data, string)
    def __contains__(self, char):
        return char in self.data

    def __len__(self): return len(self.data)
    def __getitem__(self, index): return self.__class__(self.data[index])
    def __getslice__(self, start, end):
        start = max(start, 0); end = max(end, 0)
        return self.__class__(self.data[start:end])

    def __add__(self, other):
        if isinstance(other, UserString):
            return self.__class__(self.data + other.data)
        elif isinstance(other, basestring):
            return self.__class__(self.data + other)
        else:
            return self.__class__(self.data + str(other))
    def __radd__(self, other):
        if isinstance(other, basestring):
            return self.__class__(other + self.data)
        else:
            return self.__class__(str(other) + self.data)
    def __mul__(self, n):
        return self.__class__(self.data*n)
    __rmul__ = __mul__
    def __mod__(self, args):
        return self.__class__(self.data % args)

    # the following methods are defined in alphabetical order:
    def capitalize(self): return self.__class__(self.data.capitalize())
    def center(self, width, *args):
        return self.__class__(self.data.center(width, *args))
    def count(self, sub, start=0, end=sys.maxint):
        return self.data.count(sub, start, end)
    def decode(self, encoding=None, errors=None): # XXX improve this?
        if encoding:
            if errors:
                return self.__class__(self.data.decode(encoding, errors))
            else:
                return self.__class__(self.data.decode(encoding))
        else:
            return self.__class__(self.data.decode())
    def encode(self, encoding=None, errors=None): # XXX improve this?
        if encoding:
            if errors:
                return self.__class__(self.data.encode(encoding, errors))
            else:
                return self.__class__(self.data.encode(encoding))
        else:
            return self.__class__(self.data.encode())
    def endswith(self, suffix, start=0, end=sys.maxint):
        return self.data.endswith(suffix, start, end)
    def expandtabs(self, tabsize=8):
        return self.__class__(self.data.expandtabs(tabsize))
    def find(self, sub, start=0, end=sys.maxint):
        return self.data.find(sub, start, end)
    def index(self, sub, start=0, end=sys.maxint):
        return self.data.index(sub, start, end)
    def isalpha(self): return self.data.isalpha()
    def isalnum(self): return self.data.isalnum()
    def isdecimal(self): return self.data.isdecimal()
    def isdigit(self): return self.data.isdigit()
    def islower(self): return self.data.islower()
    def isnumeric(self): return self.data.isnumeric()
    def isspace(self): return self.data.isspace()
    def istitle(self): return self.data.istitle()
    def isupper(self): return self.data.isupper()
    def join(self, seq): return self.data.join(seq)
    def ljust(self, width, *args):
        return self.__class__(self.data.ljust(width, *args))
    def lower(self): return self.__class__(self.data.lower())
    def lstrip(self, chars=None): return self.__class__(self.data.lstrip(chars))
    def partition(self, sep):
        return self.data.partition(sep)
    def replace(self, old, new, maxsplit=-1):
        return self.__class__(self.data.replace(old, new, maxsplit))
    def rfind(self, sub, start=0, end=sys.maxint):
        return self.data.rfind(sub, start, end)
    def rindex(self, sub, start=0, end=sys.maxint):
        return self.data.rindex(sub, start, end)
    def rjust(self, width, *args):
        return self.__class__(self.data.rjust(width, *args))
    def rpartition(self, sep):
        return self.data.rpartition(sep)
    def rstrip(self, chars=None): return self.__class__(self.data.rstrip(chars))
    def split(self, sep=None, maxsplit=-1):
        return self.data.split(sep, maxsplit)
    def rsplit(self, sep=None, maxsplit=-1):
        return self.data.rsplit(sep, maxsplit)
    def splitlines(self, keepends=0): return self.data.splitlines(keepends)
    def startswith(self, prefix, start=0, end=sys.maxint):
        return self.data.startswith(prefix, start, end)
    def strip(self, chars=None): return self.__class__(self.data.strip(chars))
    def swapcase(self): return self.__class__(self.data.swapcase())
    def title(self): return self.__class__(self.data.title())
    def translate(self, *args):
        return self.__class__(self.data.translate(*args))
    def upper(self): return self.__class__(self.data.upper())
    def zfill(self, width): return self.__class__(self.data.zfill(width))

class MutableString(UserString, collections.MutableSequence):
    &quot;&quot;&quot;mutable string objects

    Python strings are immutable objects.  This has the advantage, that
    strings may be used as dictionary keys.  If this property isn&#039;t needed
    and you insist on changing string values in place instead, you may cheat
    and use MutableString.

    But the purpose of this class is an educational one: to prevent
    people from inventing their own mutable string class derived
    from UserString and than forget thereby to remove (override) the
    __hash__ method inherited from UserString.  This would lead to
    errors that would be very hard to track down.

    A faster and better solution is to rewrite your program using lists.&quot;&quot;&quot;
    def __init__(self, string=&quot;&quot;):
        from warnings import warnpy3k
        warnpy3k(&#039;the class UserString.MutableString has been removed in &#039;
                    &#039;Python 3.0&#039;, stacklevel=2)
        self.data = string

    # We inherit object.__hash__, so we must deny this explicitly
    __hash__ = None

    def __setitem__(self, index, sub):
        if isinstance(index, slice):
            if isinstance(sub, UserString):
                sub = sub.data
            elif not isinstance(sub, basestring):
                sub = str(sub)
            start, stop, step = index.indices(len(self.data))
            if step == -1:
                start, stop = stop+1, start+1
                sub = sub[::-1]
            elif step != 1:
                # XXX(twouters): I guess we should be reimplementing
                # the extended slice assignment/deletion algorithm here...
                raise TypeError, &quot;invalid step in slicing assignment&quot;
            start = min(start, stop)
            self.data = self.data[:start] + sub + self.data[stop:]
        else:
            if index &lt; 0:
                index += len(self.data)
            if index &lt; 0 or index &gt;= len(self.data): raise IndexError
            self.data = self.data[:index] + sub + self.data[index+1:]
    def __delitem__(self, index):
        if isinstance(index, slice):
            start, stop, step = index.indices(len(self.data))
            if step == -1:
                start, stop = stop+1, start+1
            elif step != 1:
                # XXX(twouters): see same block in __setitem__
                raise TypeError, &quot;invalid step in slicing deletion&quot;
            start = min(start, stop)
            self.data = self.data[:start] + self.data[stop:]
        else:
            if index &lt; 0:
                index += len(self.data)
            if index &lt; 0 or index &gt;= len(self.data): raise IndexError
            self.data = self.data[:index] + self.data[index+1:]
    def __setslice__(self, start, end, sub):
        start = max(start, 0); end = max(end, 0)
        if isinstance(sub, UserString):
            self.data = self.data[:start]+sub.data+self.data[end:]
        elif isinstance(sub, basestring):
            self.data = self.data[:start]+sub+self.data[end:]
        else:
            self.data =  self.data[:start]+str(sub)+self.data[end:]
    def __delslice__(self, start, end):
        start = max(start, 0); end = max(end, 0)
        self.data = self.data[:start] + self.data[end:]
    def immutable(self):
        return UserString(self.data)
    def __iadd__(self, other):
        if isinstance(other, UserString):
            self.data += other.data
        elif isinstance(other, basestring):
            self.data += other
        else:
            self.data += str(other)
        return self
    def __imul__(self, n):
        self.data *= n
        return self
    def insert(self, index, value):
        self[index:index] = value

if __name__ == &quot;__main__&quot;:
    # execute the regression test to stdout, if called as a script:
    import os
    called_in_dir, called_as = os.path.split(sys.argv[0])
    called_as, py = os.path.splitext(called_as)
    if &#039;-q&#039; in sys.argv:
        from test import test_support
        test_support.verbose = 0
    __import__(&#039;test.test_&#039; + called_as.lower())
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