I developed a tool and I want to use it in another application. Now, I just copy my tool in the new application. The file architecture is shown as below.
.
├── inner
│ ├── a
│ │ ├── a.py
│ │ └── __init__.py
│ ├── b
│ │ ├── b.py
│ │ └── __init__.py
│ ├── __init__.py
│ └── inner.py
└── outer.py
a.py
class A(object):
def output(self):
print('A')
b.py
from a.a import A
class B(object):
def output(self, a):
print('B')
print(isinstance(a, A))
inner.py
from a.a import A
from b.b import B
a = A()
b = B()
a.output()
b.output(a)
B.output will check whether the second argument a is an instance of class A. Running inner.py under folder inner gives the output
A
B
True
However, when I run almost the same code outer.py under my new application folder, the output is not expected.
A
B
False
outer.py
import sys
sys.path.append('inner')
if __name__ == '__main__':
from inner.a.a import A
from inner.b.b import B
a = A()
b = B()
a.output()
b.output(a)
When I add print(a) in outer.py, I get <inner.a.a.A object at 0x7f45e179f2d0>, not a.a.A object.
I wonder, how to integrate the inner application to make isinstance return a proper result? Shall I add all the folders under inner into sys.path? If so, I will choose to remove the type detection.
