Tabview is currently not packaged in Debian (see BTS #811294). It is listed as
an optional dependency, but if it's absent, it crashes the whole CLI tool. With
this patch, only the `clevercsv view` command will fail, instead of the whole
program.
Index: python-clevercsv/clevercsv/__main__.py
===================================================================
--- python-clevercsv.orig/clevercsv/__main__.py
+++ python-clevercsv/clevercsv/__main__.py
@@ -13,9 +13,11 @@ from ._optional import import_optional_d
 def main():
     # Check that necessary dependencies are available
     import_optional_dependency("wilderness")
-    import_optional_dependency(
-        "tabview", raise_on_missing=not sys.platform == "win32"
-    )
+
+#    Not packaged in Debian. See BTS #811294.
+#    import_optional_dependency(
+#        "tabview", raise_on_missing=not sys.platform == "win32"
+#    )
 
     # if so, load the actual main function and call it.
     from .console import main as realmain