Decorates a class so that it encounters a breakpoint for any call to class.method_name(self,args,*kwargs), where
- method_name is given by string
- only if arguments meet a test: arg_test(self,args,*kwargs) -> bool [default -> True]
Behaviour easily changed for other actions than breakpoint (logging,...)
Python, 43 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | def any_args(self,*a,**k): return True
def watch_call(method_name,arg_test= any_args):
""" Adds a Conditionnal Breakpoint to the method method_name of the decorated obj
"""
def make_watcher(obj):
class _watch(obj):
def __init__(self,*a,**k):
init= getattr(obj,'__init__',None)
if init: return init(self,*a,**k)
def _watched_method(self,*a,**k):
if arg_test(self,*a,**k):
This_is_a_breakpoint= True # Put a breakpoint here, or take any other action
return obj.__dict__[method_name](self,*a ,**k)
setattr(_watch,method_name,_watch._watched_method)
return _watch
return make_watcher
def _________________tests__________________():pass
@watch_call("f",lambda s,*a,**k: a[0]== 1 )
class test:
def f(self,x,y= 3):
print "f(%s)"% (x+y)
def g(self,x,y=3):
print "g()"
if __name__== "__main__":
# BreakPoint if l is appenned a list
l= watch_call("append",lambda s,*a,**k: isinstance(a[0],list))(list)()
l.append('?')
l.append([])
print l
# BreakPoint if d is __setattr__["a"]
d= watch_call("__setitem__",lambda s,*a,**k: a[0]== "a" )(dict)()
d['a']= 1
print d
# Decorate class
t= test()
t.g(1)
t.f(1)
t.g(2)
t.f(2)
|
Tags: breakpoint, debug
