parameters: (self, partialread, reqlen)
docstring: Refills cstringio_buf.
  
          Returns the currently used buffer (which can but need not be the same as
          the old cstringio_buf). partialread is what the C code has read from the
          buffer, and should be inserted into the buffer before any more reads.  The
          return value must be a new, not borrowed reference.  Something along the
          lines of self._buf should be fine.
  
          If reqlen bytes can't be read, throw EOFError.
docstring_summary: Refills cstringio_buf.
docstring_tokens: Refills cstringio_buf .
function: def cstringio_refill(self, partialread, reqlen):
          """Refills cstringio_buf.
  
          Returns the currently used buffer (which can but need not be the same as
          the old cstringio_buf). partialread is what the C code has read from the
          buffer, and should be inserted into the buffer before any more reads.  The
          return value must be a new, not borrowed reference.  Something along the
          lines of self._buf should be fine.
  
          If reqlen bytes can't be read, throw EOFError.
          """
          pass
function_tokens: def cstringio_refill ( self , partialread , reqlen ) : pass