Isinstance() not working between classobj and instance

Ignition
1

Hi!
Here path correspond to the correct path of the function, not simply path.

class C1:
    def __init__(self, param1)
    self.param1 = param1

def fun1():
    c = path.C1("example")

    return path.fun2(c)

def fun2(obj):
    print type(obj)
    print type(path.C1)
    return isinstance(obj, path.C1)

For some reason fun1() returns False.

<type 'instance'>
<type 'classObj'>
False

How can I check a that an object is that specific object?

I want to check that obj corresponds to path.C1.
Hope it's clear the problem.

Thanks in advance!

Edit:
Using obj.__class__ returns

<type 'classObj'>
<type 'classObj'>
False
2

Try

class C1(object):

And go read up on legacy versus modern classes in python 2.

2 Likes
3

In my team we are always really impressed of how much information you know @pturmel .

Thanks a lot, that actually worked!

However, as note, we can't use imports we have to write the complete path so it doesn't returns a False.

Solution:

class C1(object):
    def __init__(self, param1)
    self.param1 = param1

<type 'path.C1'>  # not totally sure
<type 'type'>
True
4

You can never safely use imports with Ignition project library scripts. Ignition doesn't use jython's import machinery.

Edit: This long-standing script library bug might be (part of) the reason for the no-import best practice:

1 Like