PSL
Python Standard Library: Python标准库
Internationalization
gettext
locale
Program Frameworks
cmd
shlex
类shell的词法分析．
classes:
shlex
functions:
split(s, comments=False, posix=True)
# split("command **kwargs") -> ['command', 'arg1', ...]
data:
Custom Python Interpreters
code
codeop
Python Language Services
keyword
import keyword
functions:
keyword.iskeyword(keyword) # x.__contains__(y) <==> y in x
data:
keyword.kwlist # 返回所有关键字的列表