[Python-Dev] PEP 553: Built-in debug()
christian at python.org
Thu Sep 7 13:00:52 EDT 2017
On 2017-09-07 09:50, Barry Warsaw wrote:
> On Sep 6, 2017, at 23:10, Terry Reedy <tjreedy at udel.edu> wrote:
>> Environmental variables are set to strings, not objects. It is not clear how you intend to handle the conversion.
> The environment variable names a module import path. Without quibbling about the details of the syntax (because honestly, I’m not convinced it’s a useful feature), it would work roughly like:
> * The default value is equivalent to PYTHONBREAKPOINTHOOK=pdb.set_trace
> * breakpoint() splits the value on the rightmost dot
> * modules on the LHS are imported, then the RHS is getattr’d out of that
> * That’s the callable breakpoint() calls
Setuptools' entry points  use colon between import and function, e.g.
"pdb:set_trace" would import pdb and then execute set_trace. The
approach can be augmented to allow calling a class method, too.
would do :
from package.module import myclass
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