Changeset 3294 for pykota/trunk/pykota/utils.py

Timestamp:

01/18/08 23:39:41 (16 years ago)

Author:

jerome

Message:

Added modules to store utility functions and application
intialization code, which has nothing to do in classes.
Modified tool.py accordingly (far from being finished)
Use these new modules where necessary.
Now converts all command line arguments to unicode before
beginning to work. Added a proper logging method for already
encoded query strings.

Files:

• pykota/trunk/pykota/utils.py (copied) (copied from pykota/trunk/pykota/__init__.py) (1 diff)

pykota/trunk/pykota/utils.py

@@ -19 +19 @@
 # $Id$
 #
+
+"""This module defines some utility functions which make no sense as methods."""
+
+import sys
+import locale
+import gettext
+
+def initlocale(lang="", cset=None) :
+    """Initializes the locale stuff."""
+    try :
+        locale.setlocale(locale.LC_ALL, (lang, cset))
+    except (locale.Error, IOError) :
+        locale.setlocale(locale.LC_ALL, None)
+    (language, charset) = locale.getlocale()
+    language = language or "C"
+    try :
+        charset = charset or locale.getpreferredencoding()
+    except locale.Error :    
+        charset = sys.stdout.encoding or sys.getfilesystemencoding()
+
+    # Dirty hack : if the charset is ASCII, we can safely use UTF-8 instead
+    # This has the advantage of allowing transparent support for recent
+    # versions of CUPS which (en-)force charset to UTF-8 when printing.
+    # This should be needed only when printing, but is probably (?) safe
+    # to do when using interactive commands.
+    if charset.upper() in ('ASCII', 'ANSI_X3.4-1968') :
+        charset = "UTF-8"
+    return (language, charset)
+
+def initgettext(lang, cset) :
+    """Initializes gettext translations for PyKota."""
+    try :
+        try :
+            trans = gettext.translation("pykota", \
+                                        languages=["%s.%s" % (lang, 
+                                                              cset)], 
+                                        codeset=cset)
+        except TypeError : # Python <2.4
+            trans = gettext.translation("pykota", 
+                                        languages=["%s.%s" % (lang, 
+                                                              cset)])
+        trans.install(unicode=True)
+    except :
+        gettext.NullTranslations().install(unicode=True)
+
+def databaseToUnicode(text) :
+    """Converts from database format (UTF-8) to unicode."""
+    if text is not None :
+        return text.decode("UTF-8", "replace")
+    else : 
+        return None
+    
+def unicodeToDatabase(text) :
+    """Converts from unicode to database format (UTF-8)."""
+    if text is not None : 
+        return text.encode("UTF-8", "replace")
+    else :    
+        return None
+            
+def logerr(text) :
+    """Logs an unicode text to stderr."""
+    sys.stderr.write(text.encode(sys.stdout.encoding, "replace"))
+