(self, offset, whence=0)
return self.pos
Move to a new offset either relative or absolute. whence=0 is
        absolute, whence=1 is relative, whence=2 is relative to the end.

        Any relative or absolute seek operation which would result in a
        negative position is undefined and that case can be ignored
        in the implementation.

        Any seek operation which moves the position after the stream
        should succeed. tell() should report that position and read()
        should return an empty bytes object.
Move to a new offset either relative or absolute. whence=0 is
        absolute, whence=1 is relative, whence=2 is relative to the end.
Move to a new offset either relative or absolute . whence = 0 is absolute whence = 1 is relative whence = 2 is relative to the end .
def seek(self, offset, whence=0):
        """Move to a new offset either relative or absolute. whence=0 is
        absolute, whence=1 is relative, whence=2 is relative to the end.

        Any relative or absolute seek operation which would result in a
        negative position is undefined and that case can be ignored
        in the implementation.

        Any seek operation which moves the position after the stream
        should succeed. tell() should report that position and read()
        should return an empty bytes object."""
        if self.closed:
            raise ValueError("I/O operation on closed file")
        if whence == 0:
            if offset < 0:
                raise IOError('seek would move position outside the file')
            self.pos = offset
        elif whence == 1:
            if self.pos + offset < 0:
                raise IOError('seek would move position outside the file')
            self.pos += offset
        elif whence == 2:
            if self.size + offset < 0:
                raise IOError('seek would move position outside the file')
            self.pos = self.size + offset
        return self.pos
def seek ( self , offset , whence = 0 ) : if self . closed : raise ValueError ( "I/O operation on closed file" ) if whence == 0 : if offset < 0 : raise IOError ( 'seek would move position outside the file' ) self . pos = offset elif whence == 1 : if self . pos + offset < 0 : raise IOError ( 'seek would move position outside the file' ) self . pos += offset elif whence == 2 : if self . size + offset < 0 : raise IOError ( 'seek would move position outside the file' ) self . pos = self . size + offset return self . pos