pyppin.file.dev_null¶
An io.IOBase that behaves like /dev/null.
Classes
- class pyppin.file.dev_null.DevNull[source]¶
Bases:
IOBase- close() None[source]¶
Flush and close the IO object.
This method has no effect if the file is already closed.
- fileno() int[source]¶
Returns underlying file descriptor if one exists.
OSError is raised if the IO object does not use a file descriptor.
- flush() None[source]¶
Flush write buffers, if applicable.
This is not implemented for read-only and non-blocking streams.
- isatty() bool[source]¶
Return whether this is an ‘interactive’ stream.
Return False if it can’t be determined.
- readable() bool[source]¶
Return whether object was opened for reading.
If False, read() will raise OSError.
- seek(offset: int, whence: int = 0, /) int[source]¶
Change stream position.
Change the stream position to the given byte offset. The offset is interpreted relative to the position indicated by whence. Values for whence are:
0 – start of stream (the default); offset should be zero or positive
1 – current stream position; offset may be negative
2 – end of stream; offset is usually negative
Return the new absolute position.
- seekable() bool[source]¶
Return whether object supports random access.
If False, seek(), tell() and truncate() will raise OSError. This method may need to do a test seek().
- class pyppin.file.dev_null.RawDevNull[source]¶
Bases:
DevNull,RawIOBase- readline(size: Optional[int] = -1, /) bytes[source]¶
Read and return a line from the stream.
If size is specified, at most size bytes will be read.
The line terminator is always b’n’ for binary files; for text files, the newlines argument to open can be used to select the line terminator(s) recognized.
- readlines(hint: int = -1, /) List[bytes][source]¶
Return a list of lines from the stream.
hint can be specified to control the number of lines read: no more lines will be read if the total size (in bytes/characters) of all lines so far exceeds hint.
- readinto(b: Union[bytearray, array, memoryview, mmap, _CData, PickleBuffer], /) Optional[int][source]¶
- class pyppin.file.dev_null.TextDevNull[source]¶
Bases:
DevNull,TextIOBase- property errors: Optional[str][source]¶
The error setting of the decoder or encoder.
Subclasses should override.
- property newlines: Optional[Union[str, Tuple[str, ...]]][source]¶
Line endings translated so far.
Only line endings translated during reading are considered.
Subclasses should override.
- detach() BinaryIO[source]¶
Separate the underlying buffer from the TextIOBase and return it.
After the underlying buffer has been detached, the TextIO is in an unusable state.
- read(size: Optional[int] = -1, /) str[source]¶
Read at most n characters from stream.
Read from underlying buffer until we have n characters or we hit EOF. If n is negative or omitted, read until EOF.
- readline(size: Optional[int] = -1, /) str[source]¶
Read and return a line from the stream.
If size is specified, at most size bytes will be read.
The line terminator is always b’n’ for binary files; for text files, the newlines argument to open can be used to select the line terminator(s) recognized.
- readlines(hint: int = -1, /) List[str][source]¶
Return a list of lines from the stream.
hint can be specified to control the number of lines read: no more lines will be read if the total size (in bytes/characters) of all lines so far exceeds hint.