(stream, target, maxread=-1, buffer_size=2 * 16)
Read from :stream and write to :target until :maxread or EOF.
Read from :stream and write to :target until :maxread or EOF.
Read from : stream and write to : target until : maxread or EOF .
def copy_file(stream, target, maxread=-1, buffer_size=2 * 16):
    ''' Read from :stream and write to :target until :maxread or EOF. '''
    size, read = 0, stream.read
    while 1:
        to_read = buffer_size if maxread < 0 else min(
            buffer_size, maxread - size)
        part = read(to_read)
        if not part:
            return size
        target.write(part)
        size += len(part)
def copy_file ( stream , target , maxread = - 1 , buffer_size = 2 * 16 ) : size , read = 0 , stream . read while 1 : to_read = buffer_size if maxread < 0 else min ( buffer_size , maxread - size ) part = read ( to_read ) if not part : return size target . write ( part ) size += len ( part )