21.3.2 Standard library

The standard library support includes the following:

<Structure of this section>

(1) List of supported libraries

The following tables list Python libraries provided by the Switch.

Table 21-14: Standard libraries
Module name
__future__	_dummy_thread	_thread	abc	aifc
argparse	array	ast	asynchat	asyncore
atexit	audioop	base64	bdb	binascii
binhex	bisect	builtins	cProfile	calendar
cgi	cmath	cmd	code	codecs
collections	colorsys	compileall	concurrent	configparser
contextlib	copy	copyreg	csv	datetime
dbm	decimal	difflib	dis	distutils
doctest	dummy_threading	email	encodings	errno
fcntl	filecmp	fnmatch	fractions	ftplib
functools	gc	getopt	getpass	gettext
glob	hashlib	heapq	hmac	html
http	imaplib	imghdr	imp	importlib
inspect	io	itertools	json	keyword
lib2to3	linecache	locale	logging	macpath
mailbox	marshal	math	mimetypes	mmap
modulefinder	netrc	nntplib	numbers	operator
optparse	os	parser	pdb	pickle
pickletools	pipes	pkgutil	platform	plistlib
poplib	posixpath	pprint	profile	pstats
pty	pwd	py_compile	pyclbr	pydoc
queue	quopri	random	re	rlcompleter
runpy	sched	select	shelve	shlex
shutil	signal	site	smtpd	smtplib
sndhdr	socket	socketserver	stat	string
stringprep	struct	sunau	symtable	sys
sysconfig	tabnanny	tarfile	telnetlib	tempfile
test	textwrap	threading	time	timeit
token	tokenize	trace	traceback	tty
types	unicodedata	unittest	urllib	uu
uuid	warnings	wave	weakref	webbrowser
wsgiref	xdrlib	xml	xmlrpc	zipfile
zipimport	zlib	-	-	-

Legend:-: Not applicable

(2) Os modular limit

Some of os modules-provided functions have the following limitations:

Os.kill limit

The Switch can only send signals to scripts using Python's os.kill() and os.killpg() functions.
Os.fork limit

The Switch cannot create subprocesses due to os.fork() and os.forkpty() functions of Python.
Os.system limit

The Switch does not guarantee proper operation when programming with os.system() on Python. To execute the program, use commandline module.

(3) Socketserver modular limit

The following socketserver module-provided classes are not supported:

ForkingMixIn
ForkingUDPServer
ForkingTCPServer

(4) Http.server modular limit

The following http.server module-provided classes are not supported:

CGIHTTPRequestHandler

(5) User Limits

Although the standard library can be executed only by a superuser, the Switch does not support execution by a superuser.