def readinto(self, b: bytearray) -> Optional[int]:
raise io.UnsupportedOperation()
def detach(self):
raise io.UnsupportedOperation("detach() not supported")
def _check_can_read(self):
if not self.readable():
raise io.UnsupportedOperation("File not open for reading")
def readline(self, size=-1):
"""Read a line."""
raise io.UnsupportedOperation("cannot read a line from a Jupyter redirect")
def truncate(self, size=None):
"""Truncate both buffers."""
raise io.UnsupportedOperation("cannot truncate Jupyter redirect")
def seek(self, offset, whence=io.SEEK_SET):
"""Seek to a location."""
raise io.UnsupportedOperation("cannot seek Jupyter redirect")
def detach(self):
"""This operation is not supported."""
raise io.UnsupportedOperation("cannot detach a Jupyter redirect")
def _check_can_write(self):
if self._mode != _MODE_WRITE:
self._check_not_closed()
raise io.UnsupportedOperation("File not open for writing")
def readinto(self, buf):
raise io.UnsupportedOperation('readinto')
def read(self, n=-1):
raise io.UnsupportedOperation("read")
def _check_can_read(self):
if self._mode not in (_MODE_READ, _MODE_READ_EOF):
self._check_not_closed()
raise io.UnsupportedOperation("File not open for reading")
def write(self, b):
# This is needed because python will not always return the correct
# kind of error even though writeable returns False.
raise io.UnsupportedOperation("write")
def write(self, b: bytes) -> int:
raise io.UnsupportedOperation()
def __next__(self):
"""Iterator API."""
raise io.UnsupportedOperation('Cannot iterate an EncryptingStream')
def read(self, size=-1):
raise io.UnsupportedOperation('read')
def seek(self, pos: int, whence: int = 0) -> int:
if self._seekable:
return self._bytes_io.seek(pos, whence)
raise io.UnsupportedOperation('seek')
def write(self, value):
raise io.UnsupportedOperation('write')
def seek(self, pos: int, whence: int = 0) -> int:
if self._seekable:
return super(SlowBytesIO, self).seek(pos, whence)
raise io.UnsupportedOperation('seek')
def truncate(self, size=None):
"""Truncate the streams."""
raise io.UnsupportedOperation("cannot truncate Jupyter redirect")
def write(self, _):
"""See io.RawIOBase.write."""
raise io.UnsupportedOperation('write')
def read(self, size=None):
"""Read from the stream"""
raise io.UnsupportedOperation("cannot read a Jupyter redirect")
def readinto1(self, *args, **kwargs):
if 'r' not in self.mode and '+' not in self.mode:
raise io.UnsupportedOperation('not readable')
return self.stream.readinto1(*args, **kwargs)
def seek(self, offset, whence=io.SEEK_SET):
"""Sets the location in both the stdbuf and the membuf."""
raise io.UnsupportedOperation("cannot seek Jupyter redirect")
def read(self, size=-1):
if 'r' not in self.mode and '+' not in self.mode:
raise io.UnsupportedOperation('not readable')
return self.stream.read(size)
def readinto(self, b):
"""Read bytes into buffer from both streams."""
raise io.UnsupportedOperation("cannot read into Jupyter redirect")
def readlines(self, hint=-1):
if 'r' not in self.mode and '+' not in self.mode:
raise io.UnsupportedOperation('not readable')
return self.stream.readlines(hint)
def fileno_opt(self):
raise io.UnsupportedOperation('Not a real file')
def write(self, s):
if 'r' in self.mode and '+' not in self.mode:
raise io.UnsupportedOperation('not writable')
return self.stream.write(s)
def _check_can_write(self):
if not self.writable():
raise io.UnsupportedOperation("File not open for writing")
def fileno(self) -> int:
raise io.UnsupportedOperation(
"redirected stdin is pseudofile, has no fileno()")
