Steven D'Aprano wrote:
On Sat, 14 Aug 2010 16:05:05 -0700, bvdp wrote:
<snip>
def error(s):
print "Error", s
sys.exit(1)
<snip>
This general technique is called "monkey patching".
<snip>
You can either manually exit from your own error handler:
def myerror(s):
print "new error message"
sys.exit(2)
or call the original error handler:
def myerror(s):
print "new error message"
foo._error(s)
That second technique requires some preparation before hand. In module
foo, after defining the error() function, you then need to create a
second, private, name to it:
_error = error
Small point. The OP's request was that he not modify the called module,
which is why he was considering monkey-patching. And you can readily
avoid adding that line to the file. Just do something like this:
import foo
_olderror_func = foo.error
def myerror(s)
print "new error message"
_olderror_func(s)
DaveA
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