Split the string s using shell-like syntax. If comments is
False, the parsing of comments in the given string will be
disabled (setting the commenters member of the shlex
instance to the empty string). This function operates in POSIX mode.
New in version 2.3.
A shlex instance or subclass instance is a lexical analyzer
object. The initialization argument, if present, specifies where to
read characters from. It must be a file-/stream-like object with
read() and readline() methods, or a string (strings
are accepted since Python 2.3). If no argument is given, input will be
taken from sys.stdin. The second optional argument is a filename
string, which sets the initial value of the infile member. If
the instream argument is omitted or equal to sys.stdin,
this second argument defaults to ``stdin''. The posix argument
was introduced in Python 2.3, and defines the operational mode. When
posix is not true (default), the shlex instance will
operate in compatibility mode. When operating in POSIX mode,
shlex will try to be as close as possible to the POSIX shell
parsing rules. See 5.20.2.
