python文档怎么看

help

在交互模式下，help函数是获取文档的好帮手，使用非常简单。

>>> import struct
>>> help(struct)
Help on module struct:
 
NAME
    struct
 
DESCRIPTION
    Functions to convert between Python values and C structs.
    Python bytes objects are used to hold the data representing the C struct
    and also as format strings (explained below) to describe the layout of data
    in the C struct.
 
    The optional first format char indicates byte order, size and alignment:
      @: native order, size & alignment (default)
      =: native order, std. size & alignment
      <: little-endian, std. size & alignment
      >: big-endian, std. size & alignment
      !: same as >
 
    The remaining chars indicate types of args and must match exactly;
    these can be preceded by a decimal repeat count:
      x: pad byte (no data); c:char; b:signed byte; B:unsigned byte;
      ?: _Bool (requires C99; if not available, char is used instead)
      h:short; H:unsigned short; i:int; I:unsigned int;

__doc__

__doc__是每个对象都有的属性，其存放了对象文档。

>>> import struct
>>> struct.__doc__
"Functions to convert between Python values and C structs.\nPython bytes objects are used to hold the data representing the C struct\nand also as format string
s (explained below) to describe the layout of data\nin the C struct.\n\nThe optional first format char indicates byte order, size and alignment:\n  @: native o
rder, size & alignment (default)\n  =: native order, std. size & alignment\n  <: little-endian, std. size & alignment\n  >: big-endian, std. size & alignment\n
  !: same as >\n\nThe remaining chars indicate types of args and must match exactly;\nthese can be preceded by a decimal repeat count:\n  x: pad byte (no data)
; c:char; b:signed byte; B:unsigned byte;\n  ?: _Bool (requires C99; if not available, char is used instead)\n  h:short; H:unsigned short; i:int; I:unsigned in
t;\n  l:long; L:unsigned long;

离线文档

安装Python时会自带一个chm格式的离线文档Python documention，该文档的信息比较全。

离线模块文档

Python针对模块还有一个单独的文档，该文档在浏览器中查看。

在线文档

在浏览器打开https://docs.python.org/3.4/