On 3/25/2015 1:29 PM, Manuel Graune wrote:
Hi,
I'm looking for a way to supply a condition to an if-statement inside a
function body when calling the function. I can sort of get what I want
with using eval (see code below) but I would like to achieve this in a
safer way. If there is a solution which is safer while being
less flexible, that would be fine. Also, supplying the condition as a
string is not necessary. What I want to do is basically like this:
def test1(a, b, condition="True"):
for i,j in zip(a,b):
c=i+j
if eval(condition):
print("Foo")
The standard solution to the above is to have a boolean parameter, such
as print_wanted=False.
test1([0,1,2,3],[1,2,3,4],"i+j >4")
print("Bar")
For this, follow Ian's suggestion of passing a predicate function.
--
Terry Jan Reedy
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