一 查看所有的关键字：help("keywords")
Here is a list of the Python keywords. Enter any keyword to get more help.
and elif import return
as else in try
assert except is while
break finally lambda with
class for not yield
continue from or
def global pass
del if raise
and elif import return
as else in try
assert except is while
break finally lambda with
class for not yield
continue from or
def global pass
del if raise
二 其他
查看python所有的modules：help("modules")
单看python所有的modules中包含指定字符串的modules： help("modules yourstr")
查看python中常见的topics： help("topics")
查看python标准库中的module：import os.path + help("os.path")
查看python内置的类型：help("list")
查看python类型的成员方法：help("str.find")
查看python内置函数：help("open")