live-de-python/codigo/Live31/string.py at master · devblackpower/live-de-python · GitHub

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from collections import Sequence

class UserString(collections.Sequence):
    """
    Implementação no python 2.

    https://svn.python.org/projects/python/trunk/Lib/UserString.py
    """
    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))