(src, dst, length=None)
return
Copy length bytes from fileobj src to fileobj dst.
       If length is None, copy the entire content.
Copy length bytes from fileobj src to fileobj dst.
       If length is None, copy the entire content.
Copy length bytes from fileobj src to fileobj dst . If length is None copy the entire content .
def copyfileobj(src, dst, length=None):
    """Copy length bytes from fileobj src to fileobj dst.
       If length is None, copy the entire content.
    """
    if length == 0:
        return
    if length is None:
        while True:
            buf = src.read(16*1024)
            if not buf:
                break
            dst.write(buf)
        return

    BUFSIZE = 16 * 1024
    blocks, remainder = divmod(length, BUFSIZE)
    for b in range(blocks):
        buf = src.read(BUFSIZE)
        if len(buf) < BUFSIZE:
            raise IOError("end of file reached")
        dst.write(buf)

    if remainder != 0:
        buf = src.read(remainder)
        if len(buf) < remainder:
            raise IOError("end of file reached")
        dst.write(buf)
    return
def copyfileobj ( src , dst , length = None ) : if length == 0 : return if length is None : while True : buf = src . read ( 16 * 1024 ) if not buf : break dst . write ( buf ) return BUFSIZE = 16 * 1024 blocks , remainder = divmod ( length , BUFSIZE ) for b in range ( blocks ) : buf = src . read ( BUFSIZE ) if len ( buf ) < BUFSIZE : raise IOError ( "end of file reached" ) dst . write ( buf ) if remainder != 0 : buf = src . read ( remainder ) if len ( buf ) < remainder : raise IOError ( "end of file reached" ) dst . write ( buf ) return