如何为内置python函数制作pydev show doc？

Question

现在对于内置函数，pydev只显示：

  list.append Found at: builtins

而对于matplotlib中的函数，它显示：

def figure Found at: matplotlib.pyplot

def figure(num= # autoincrement if None, else integer from 1-N
    None, figsize= # defaults to rc figure.figsize
    None, dpi= # defaults to rc figure.dpi
    None, facecolor= # defaults to rc figure.facecolor
    None, edgecolor= # defaults to rc figure.edgecolor
    None, frameon=True, 
    FigureClass=Figure, **
    kwargs):
.....................

我已经在我的linux系统中安装了python-docs包，我该怎么做才能让它显示内置python函数的详细函数提示？