UUID.bytes The UUID as a 16-byte string (containing the six integer fields in big-endian byte order).

exception email.errors.BoundaryError Raised under some error conditions when parsing the RFC 2822 headers of a message, this class is derived from MessageParseError. It can be raised from the Parser.parse or Parser.parsestr methods. Situations where it can be raised include not being able to find the starting or terminating boundary in a multipart/* message when strict parsing is used.

bytes.isalpha() bytearray.isalpha() Return true if all bytes in the sequence are alphabetic ASCII characters and the sequence is not empty, false otherwise. Alphabetic ASCII characters are those byte values in the sequence b'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'. For example: >>> b'ABCabc'.isalpha() True >>> b'ABCabc1'.isalpha() False

modules A dictionary mapping module names to modules. See Example usage of ModuleFinder.

test.support.change_cwd(path, quiet=False) A context manager that temporarily changes the current working directory to path and yields the directory. If quiet is False, the context manager raises an exception on error. Otherwise, it issues only a warning and keeps the current working directory the same.

str.isspace() Return true if there are only whitespace characters in the string and there is at least one character, false otherwise. Whitespace characters are those characters defined in the Unicode character database as “Other” or “Separator” and those with bidirectional property being one of “WS”, “B”, or “S”.

MimeTypes.readfp(fp, strict=True) Load MIME type information from an open file fp. The file must have the format of the standard mime.types files. If strict is True, information will be added to the list of standard types, else to the list of non-standard types.

new_child(m=None) Returns a new ChainMap containing a new map followed by all of the maps in the current instance. If m is specified, it becomes the new map at the front of the list of mappings; if not specified, an empty dict is used, so that a call to d.new_child() is equivalent to: ChainMap({}, *d.maps). This method is used for creating subcontexts that can be updated without altering values in any of the parent mappings. Changed in version 3.4: The optional m parameter was added.

math.sqrt(x) Return the square root of x.

str.endswith(suffix[, start[, end]]) Return True if the string ends with the specified suffix, otherwise return False. suffix can also be a tuple of suffixes to look for. With optional start, test beginning at that position. With optional end, stop comparing at that position.