1 files changed, 37 insertions, 0 deletions
diff --git a/nivis/exception.py b/nivis/exception.py
new file mode 100644
index 0000000..0ec22e5
--- /dev/null
+++ b/nivis/exception.py
@@ -0,0 +1,37 @@
+class PsiException(Exception):
+    """
+    An exception class for Psi-specific exceptions.
+
+    This class inherits from the built-in `Exception` class.
+
+    Example:
+        ```python
+        raise PsiException("An error occurred in the Psi code.")
+        ```
+    """
+
+
+class ValueError(PsiException):
+    """
+    An exception class for value-related errors in Psi code.
+
+    This class inherits from the `PsiException` class.
+
+    Example:
+        ```python
+        raise ValueError("Invalid value encountered in the Psi code.")
+        ```
+    """
+
+
+class GrammarError(PsiException):
+    """
+    An exception class for grammar-related errors in Psi code.
+
+    This class inherits from the `PsiException` class.
+
+    Example:
+        ```python
+        raise GrammarError("Invalid grammar encountered in the Psi code.")
+        ```
+    """