pyhton-web开发
join()
split()
startswith()
endswith()
find()
replace()
translate()
strptime()
re——正则表达式
re.match()
re.search()
re.sub()
re.split()
re.findall()
escape(pattern)
os——库、模块、操作系统
open()
read()
readline()
readlines()
write()
writelines()
remove()
copyfile()
move()
mkdir()
makedirs()
rmdir()
rmtree()