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Various types of useful iterators and generators.
Text I/O implementation using an in-memory buffer. The initial_value argument sets the value of object. The newline argument is like the one of TextIOWrapper's constructor.
close(self, /) Close the IO object. Attempting any further operation after the object is closed will raise a ValueError. This method has no effect if the file is already closed.
detach(...) Separate the underlying buffer from the TextIOBase and return it. After the underlying buffer has been detached, the TextIO is in an unusable state.
fileno(self, /) Returns underlying file descriptor if one exists. OSError is raised if the IO object does not use a file descriptor.
flush(self, /) Flush write buffers, if applicable. This is not implemented for read-only and non-blocking streams.
getvalue(self, /) Retrieve the entire contents of the object.
isatty(self, /) Return whether this is an 'interactive' stream. Return False if it can't be determined.
read(self, size=-1, /) Read at most size characters, returned as a string. If the argument is negative or omitted, read until EOF is reached. Return an empty string at EOF.
readable(self, /) Returns True if the IO object can be read.
readline(self, size=-1, /) Read until newline or EOF. Returns an empty string if EOF is hit immediately.
readlines(self, hint=-1, /) 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.
seek(self, pos, whence=0, /)
Change stream position.
Seek to character offset pos relative to position indicated by whence:
0 Start of stream (the default). pos should be >= 0;
1 Current position - pos must be 0;
2 End of stream - pos must be 0.
Returns the new absolute position.
seekable(self, /) Returns True if the IO object can be seeked.
tell(self, /) Tell the current file position.
truncate(self, pos=None, /) Truncate size to pos. The pos argument defaults to the current file position, as returned by tell(). The current file position is unchanged. Returns the new absolute position.
writable(self, /) Returns True if the IO object can be written.
write(self, s, /) Write string to file. Returns the number of characters written, which is always equal to the length of the string.
writelines(self, lines, /) Write a list of lines to stream. Line separators are not added, so it is usual for each of the lines provided to have a line separator at the end.
closed = <attribute 'closed' of '_io.StringIO' objects>
encoding = <attribute 'encoding' of '_io._TextIOBase' objects> Encoding of the text stream. Subclasses should override.
errors = <attribute 'errors' of '_io._TextIOBase' objects> The error setting of the decoder or encoder. Subclasses should override.
line_buffering = <attribute 'line_buffering' of '_io.StringIO' objects>
newlines = <attribute 'newlines' of '_io.StringIO' objects>
body_line_iterator(msg, decode=False)
Iterate over the parts, returning string payloads line-by-line.
Optional decode (default False) is passed through to .get_payload().
typed_subpart_iterator(msg, maintype='text', subtype=None)
Iterate over the subparts with a given MIME type.
Use `maintype' as the main MIME type to match against; this defaults to
"text". Optional `subtype' is the MIME subtype to match against; if
omitted, only the main type is matched.
walk(self)
Walk over the message tree, yielding each subpart.
The walk is performed in depth-first order. This method is a
generator.