support standalone library

tono.py

@@ -0,0 +1,40 @@
+"""
+tono — topographical signal processing library.
+
+This module provides a convenient ``import tono`` entry point for using
+tono's processing nodes as a standalone Python library, without running
+the web server.
+
+Quick start::
+
+    import tono
+
+    # Load SPM data
+    fields = tono.load("scan.gwy")
+
+    # Process
+    result = tono.apply("GaussianFilter", fields[0], sigma=3.0)
+
+    # Create a field from a numpy array
+    import numpy as np
+    f = tono.field(np.random.randn(256, 256))
+
+See ``backend.api`` for the full API documentation.
+"""
+
+from backend.api import (  # noqa: F401
+    apply,
+    channel_names,
+    field,
+    get_node,
+    load,
+    nodes,
+    supported_formats,
+)
+from backend.data_types import (  # noqa: F401
+    DataField,
+    DataTable,
+    LineData,
+    MeshModel,
+    RecordTable,
+)