From 80d7ee3494260fbb02bf1641c289d1af6a6428a9 Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@drexel.edu>
Date: Mon, 5 Jan 2009 10:09:24 -0500
Subject: [PATCH] Added error specific to missing database files.

Better than a general assert error.
---
 text_db.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/text_db.py b/text_db.py
index 06d31fc..0d0bf72 100644
--- a/text_db.py
+++ b/text_db.py
@@ -77,7 +77,8 @@ class text_db (object) :
         Assert that the database exists on disk.
         Print a reasonable error if it does not.
         """
-        assert self.exists(), "Missing database file %s" % self.curpath()
+        if not self.exists():
+            raise missingDatabaseFile(self.curpath())
     def _open(self) :
         "Load the database from disk"
         self._assert_exists()
@@ -253,6 +254,13 @@ class text_db (object) :
         self._records.append(['']*len(self._header))
         return record
 
+class missingDatabaseFile (Exception) :
+    "Specified database file does not exist"
+    def __init__(self, path):
+        msg = "Missing database file %s" % path
+        Exception.__init__(self, msg)
+        self.path = path
+
 class indexStringError (Exception) :
     "invalid index string format"
     pass
-- 
2.26.2