Taragolis commented on issue #16892:
URL: https://github.com/apache/airflow/issues/16892#issuecomment-2042189581
I guess the original problem with mapping keys are:
1. Keys should be hashable
2. It should be unique
Some simple snippet for demonstrate
```python
from jinja2 import Environment
from jinja2.nativetypes import NativeEnvironment
dups_keys = {
"a": "{{ 'foo' }}",
"{{ 'a' }}": "bar",
}
print(f"Original: {dups_keys}")
env = Environment()
rendered_value = {
env.from_string(k).render(): env.from_string(v).render()
for k, v in dups_keys.items()
}
print(f"Rendered: {rendered_value}")
non_hashable_keys = {
"{{ spam }}": "{{ spam }}",
}
print(f"Original: {non_hashable_keys}")
nenv = NativeEnvironment()
rendered_value = {
nenv.from_string(k).render(spam=["a"]):
nenv.from_string(v).render(spam=["a"])
for k, v in non_hashable_keys.items()
}
print(f"Rendered: {non_hashable_keys}")
```
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