Exceptions¶

Custom exception classes raised by SPFlow for various error conditions.

exception spflow.exceptions.InvalidParameterCombinationError[source]¶

Raised when incompatible parameters are provided together.

exception spflow.exceptions.ScopeError[source]¶

Raised when variable scopes are invalid or incompatible.

exception spflow.exceptions.ShapeError[source]¶

Raised when tensor shapes don’t meet expected requirements.

exception spflow.exceptions.StructureError[source]¶

Raised when circuit structure or configuration is invalid.

exception spflow.exceptions.GraphvizError[source]¶

Raised when Graphviz is not installed or fails to execute.

Includes detailed installation instructions in error message.

INSTALL_INSTRUCTIONS = 'To fix this issue:\n 1. Install the Graphviz system dependency:\n - On macOS: brew install graphviz\n - On Ubuntu/Debian: sudo apt-get install graphviz\n - On Windows: Download from https://graphviz.org/download/\n 2. Verify installation by running: dot -V\n 3. Check that Graphviz binaries are in your system PATH\n\nFor more details, see the README.md file in the SPFlow repository.'¶