Completed documentation for errorcodes module.

doc/src/_static/psycopg.css

@@ -1,5 +1,9 @@
 @import url("default.css");
 
+blockquote {
+    font-style: italic;
+}
+
 div.admonition-todo {
     background-color: #ffa;
     border: 1px solid #ee2;

doc/src/errorcodes.rst

@@ -3,13 +3,20 @@
 
 .. sectionauthor:: Daniele Varrazzo <daniele.varrazzo@gmail.com>
 
+.. index::
+    single: Error; Codes
+
 .. module:: psycopg2.errorcodes
 
+.. testsetup:: *
+
+    from psycopg2 import errorcodes
+
 .. versionadded:: 2.0.6
 
-This module contains symbolic names for all PostgreSQL error codes.
-Subclasses of :exc:`~psycopg2.Error` make the PostgreSQL error code available
-in the :attr:`~psycopg2.Error.pgcode` attribute.
+This module contains symbolic names for all PostgreSQL error codes and error
+classes codes.  Subclasses of :exc:`~psycopg2.Error` make the PostgreSQL error
+code available in the :attr:`~psycopg2.Error.pgcode` attribute.
 
 From PostgreSQL documentation:
 
@@ -30,12 +37,36 @@ From PostgreSQL documentation:
     recognize the specific error code can still be able to infer what to do
     from the error class.
 
-
 .. seealso:: `PostgreSQL Error Codes table`__
 
     .. __: http://www.postgresql.org/docs/8.4/static/errcodes-appendix.html#ERRCODES-TABLE
 
 
-.. todo:: errors table
+An example of the available constants defined in the module:
+
+    >>> errorcodes.CLASS_SYNTAX_ERROR_OR_ACCESS_RULE_VIOLATION
+    '42'
+    >>> errorcodes.UNDEFINED_TABLE
+    '42P01'
+
+Constants representing all the error values documented by PostgreSQL versions
+between 8.1 and 8.4 are included in the module.
+
+
+.. autofunction:: lookup(code)
+
+    .. doctest::
+
+        >>> try:
+        ...     cur.execute("SELECT ouch FROM aargh;")
+        ... except Exception, e:
+        ...     pass
+        ...
+        >>> errorcodes.lookup(e.pgcode[:2])
+        'CLASS_SYNTAX_ERROR_OR_ACCESS_RULE_VIOLATION'
+        >>> errorcodes.lookup(e.pgcode)
+        'UNDEFINED_TABLE'
+
+    .. versionadded:: 2.0.14
 
 

lib/errorcodes.py

@@ -30,9 +30,9 @@ This module contains symbolic names for all PostgreSQL error codes.
 #
 
 def lookup(code, _cache={}):
-    """Lookup a code error and return its symbolic name.
+    """Lookup an error code or class code and return its symbolic name.
 
-    Raise KeyError if the code is not found.
+    Raise :exc:`KeyError` if the code is not found.
     """
     if _cache:
         return _cache[code]

scripts/make_errorcodes.py

@@ -71,6 +71,11 @@ def parse_errors(url):
             errcode = tr.tt.string.encode("ascii")
             assert len(errcode) == 5
             errlabel = tr('td')[1].string.replace(" ", "_").encode("ascii")
+
+            # double check the columns are equal
+            cond_name = tr('td')[2].string.upper().encode("ascii")
+            assert errlabel == cond_name, tr
+
             errors[class_][errcode] = errlabel
 
     return classes, errors