tracing function calls

[Stormbringer]

Greetings,

I've been wondering if there is a mechanism similar to trace/untrace
found in lisp, for example call trace(function-name) and whenever this
function is called it will show its parameters to stdout ....

[Fredrik Lundh]

"Stormbringer" wrote:

I've been wondering if there is a mechanism similar to trace/untrace
found in lisp, for example call trace(function-name) and whenever this
function is called it will show its parameters to stdout ....

def trace(func):
def tracer(*args, **kwargs):
print func.__name__, args, kwargs
result = func(*args, **kwargs)
print func.__name__, "return", result
return result
return tracer

def myfunc(a, b, c):
return a + b + c

myfunc = trace(myfunc)

myfunc(1, 2, 3)

(tweak as necessary)

</F>

[Stormbringer]

Thank you Fredrik !
With a little tweaking for the right indentation it should prove useful
:)

Fredrik Lundh wrote:

"Stormbringer" wrote:

I've been wondering if there is a mechanism similar to trace/untrace found in lisp, for example call trace(function-name) and whenever this function is called it will show its parameters to stdout ....

def trace(func):
def tracer(*args, **kwargs):
print func.__name__, args, kwargs
result = func(*args, **kwargs)
print func.__name__, "return", result
return result
return tracer

def myfunc(a, b, c):
return a + b + c

myfunc = trace(myfunc)

myfunc(1, 2, 3)

(tweak as necessary)

</F>