import sys
from _abcoll import MutableSequence

class _Argv(MutableSequence):
    def __init__(self, data, encode, decode):
        self._data = data
        self._encode = encode
        self._decode = decode

    def __len__(self):
        return len(self._data)

    def __getitem__(self, index):
        value = self._data[index]
        return self._encode(value)

    def __setitem__(self, index, value):
        self._data[index] = self._decode(value)

    def __delitem__(self, index):
        del self._data[index]

    def insert(self, index, value):
        self._data.insert(index, self._decode(value))

    def __repr__(self):
        items = (repr(item) for item in self)
        return '[{}]'.format(', '.join(items))

def _get():
    encoding = sys.getfilesystemencoding()
    if encoding == 'mbcs':
        errors = 'strict'
    else:
        errors = 'surrogateescape'
    def encode(value):
        return value.encode(encoding, errors)
    def decode(value):
        return value.decode(encoding, errors)

    return _Argv(sys.argv, encode, decode)

sys.argvb = _get()
del _get
del _Argv