Merge pull request #5 from LaurentMertens/pyswip_err_msg

Throw TypeError when wrong PySwip version is being used
ML-KULeuven · Dec 5, 2022 · 2385021 · 2385021
2 parents dde8985 + eb7d877
commit 2385021
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/deepproblog/engines/prolog_engine/swi_program.py b/src/deepproblog/engines/prolog_engine/swi_program.py
@@ -322,6 +322,14 @@ def query(self, query: str, profile=0) -> List[Dict[str, Any]]:
                 for k in r:
                     v = result[0][k]
                     if type(v) is list:
+                        if isinstance(v[0], str):
+                            raise TypeError("Oops, it appears you are using the wrong version of PySwip.\n"
+                                            "Please make sure you are using PySwip from https://github.com/ML-KULeuven/pyswip\n"
+                                            "To install, first remove your current PySwip version, then install the correct version.\n"
+                                            "You can try doing\n'pip install git+https://github.com/ML-KULeuven/pyswip'.\n"
+                                            "For some reason, this does not always resolve the issue. If you still get this error,\n"
+                                            "clone the repo locally, then compile from your local codebase doing\n"
+                                            "'pip install [path to local clone]'.")
                         out_partial[k] = [p for p in term2list(parse(result[0][k]))]
                     else:
                         out_partial[k] = parse(v)