[Lang] Add error message for printing an incomplelely-defined field (#…

…2979)
taichi-dev · Sep 23, 2021 · a301810 · a301810
1 parent 8532cfd
commit a301810
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/python/taichi/lang/field.py b/python/taichi/lang/field.py
@@ -187,6 +187,8 @@ def __getitem__(self, key):
     def __str__(self):
         if impl.inside_kernel():
             return self.__repr__()  # make pybind11 happy, see Matrix.__str__
+        if self.snode.ptr is None:
+            return '<Field: Definition of this field is incomplete>'
         else:
             return str(self.to_numpy())