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Diffstat (limited to 'Doc/lib/libinspect.tex')
| -rw-r--r-- | Doc/lib/libinspect.tex | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Doc/lib/libinspect.tex b/Doc/lib/libinspect.tex index a1293f0..cc41f2f 100644 --- a/Doc/lib/libinspect.tex +++ b/Doc/lib/libinspect.tex @@ -161,6 +161,31 @@ Note: Return true if the object is a user-defined or built-in function or method. \end{funcdesc} +\begin{funcdesc}{ismethoddescriptor}{object} + Return true if the object is a method descriptor, but not if ismethod() or + isclass() or isfunction() are true. + + This is new as of Python 2.2, and, for example, is true of int.__add__. + An object passing this test has a __get__ attribute but not a __set__ + attribute, but beyond that the set of attributes varies. __name__ is + usually sensible, and __doc__ often is. + + Methods implemented via descriptors that also pass one of the other + tests return false from the ismethoddescriptor() test, simply because + the other tests promise more -- you can, e.g., count on having the + im_func attribute (etc) when an object passes ismethod(). +\end{funcdesc} + +\begin{funcdesc}{isdatadescriptor}{object} + Return true if the object is a data descriptor. + + Data descriptors have both a __get__ and a __set__ attribute. Examples are + properties (defined in Python) and getsets and members (defined in C). + Typically, data descriptors will also have __name__ and __doc__ attributes + (properties, getsets, and members have both of these attributes), but this + is not guaranteed. +\end{funcdesc} + \subsection{Retrieving source code \label{inspect-source}} |