diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/io.rst | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/Doc/library/io.rst b/Doc/library/io.rst index 6432d99..5188b51 100644 --- a/Doc/library/io.rst +++ b/Doc/library/io.rst @@ -326,11 +326,14 @@ I/O Base Classes .. method:: read(n=-1) - Read and return up to *n* bytes from the stream. As a convenience, if - *n* is unspecified or -1, :meth:`readall` is called. Otherwise, - only one system call is ever made. An empty bytes object is returned - on EOF; ``None`` is returned if the object is set not to block and has - no data to read. + Read up to *n* bytes from the object and return them. As a convenience, + if *n* is unspecified or -1, :meth:`readall` is called. Otherwise, + only one system call is ever made. Fewer than *n* bytes may be + returned if the operating system call returns fewer than *n* bytes. + + If 0 bytes are returned, and *n* was not 0, this indicates end of file. + If the object is in non-blocking mode and no bytes are available, + ``None`` is returned. .. method:: readall() |