python帮助系统函数_【Python】【基础知识】【内置函数】【help的使用方法】

原英文帮助文档：

help([object])

Invoke the built-in help system. (This function is intended for interactive use.) If no argument is given, the interactive help system starts on the interpreter console. If the argument is a string, then the string is looked up as the name of a module, function, class, method, keyword, or documentation topic, and a help page is printed on the console. If the argument is any other kind of object, a help page on the object is generated.

This function is added to the built-in namespace by the site module.

Changed in version 3.4: Changes to pydoc and inspect mean that the reported signatures for callables are now more comprehensive and consistent.

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中文解释

调用内置的帮助系统。(这个函数用于交互模式使用)

如果未给出参数，则交互帮助系统将在解释器控制台上启动。

示例：

>>>help

Type help()for interactive help, or help(object) forhelp about object.>>>help()

Welcome to Python3.7's help utility!

If thisisyour first time using Python, you should definitely check out

the tutorial on the Internet at https://docs.python.org/3.7/tutorial/.

Enter the name of any module, keyword,ortopic to get help on writing

Python programsand using Python modules. To quit this help utility and

return to the interpreter, just type "quit".

To get a list of available modules, keywords, symbols,ortopics, type"modules", "keywords", "symbols", or "topics". Each module also comes

with a one-line summary of what it does; to list the modules whose nameor summary contain a given string such as "spam", type "modules spam".

help>abs

Help on built-in function abs inmodule builtins:

abs(x,/)

Return the absolute value of the argument.

help>input

Help on built-in function input inmodule builtins:

input(prompt=None, /)

Read a stringfrom standard input. The trailing newline isstripped.

The prompt string,if given, isprinted to standard output without a

trailing newline before reading input.

If the user hits EOF (*nix: Ctrl-D, Windows: Ctrl-Z+Return), raiseEOFError.

On*nix systems, readline is used ifavailable.

help>input()

No Python documentation foundfor 'input()'.

Use help() to get the interactive help utility.

Use help(str)for help on the str class.

help>quit

You are now leaving helpandreturning to the Python interpreter.

If you want to askfor help on a particular object directly fromthe

interpreter, you can type"help(object)". Executing "help('string')"has the same effect as typing a particular string at the help>prompt.>>>

---退出帮助模式使用quit

如果参数是字符串，则该字符串将作为模块、函数、类、方法、关键字或文档主题的名称查找，并在控制台上打印帮助页。

>>> help("time")

Help on built-inmodule time:

NAME

time-This module provides various functions to manipulate time values.

DESCRIPTION

There are two standard representations of time. Oneisthe number

of seconds since the Epoch,inUTC (a.k.a. GMT). It may be an integerora floating point number (to represent fractions of seconds).

The Epochis system-defined; on Unix, it is generally January 1st, 1970.

The actual value can be retrieved by calling gmtime(0).

The other representationis a tuple of 9integers giving local time.

The tuple items are:

year (including century, e.g.1998)

month (1-12)

day (1-31)

hours (0-23)

minutes (0-59)

seconds (0-59)

weekday (0-6, Monday is0)

Julian day (dayin the year, 1-366)

DST (Daylight Savings Time) flag (-1, 0 or 1)

If the DST flagis 0, the time is given inthe regular time zone;if it is 1, the time is given inthe DST time zone;if it is -1, mktime() should guess based on the date andtime.

CLASSES

builtins.tuple(builtins.object)

struct_timeclassstruct_time(builtins.tuple)| struct_time(iterable=(), /)

如果参数是任何其他类型的对象，则会生成该对象的帮助页。

>>> a = "test"

>>>help(a)

Help on package test:

NAME

test- #Dummy file to make this directory a package.

PACKAGE CONTENTS__main___test_multiprocessing

ann_module

ann_module2