[Zope-CVS] SVN: book/trunk/talesrunner.py Added tales runner script that goes with the tales chapter.

[Stephan Richter]

Log message for revision 27248:
  Added tales runner script that goes with the tales chapter.
  


Changed:
  A   book/trunk/talesrunner.py


-=-
Added: book/trunk/talesrunner.py
===================================================================
--- book/trunk/talesrunner.py	2004-08-24 17:54:56 UTC (rev 27247)
+++ book/trunk/talesrunner.py	2004-08-24 17:55:42 UTC (rev 27248)
@@ -0,0 +1,74 @@
+##############################################################################
+#
+# Copyright (c) 2004 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""TALES runner
+
+$Id: talesrunner.py,v 1.1.1.1 2004/02/18 18:07:08 srichter Exp $
+"""
+import os, sys
+from zope.tales.engine import Engine
+from zope.tales.tales import Context
+
+class Directory(object):
+
+    def __init__(self, path):
+        self.path = path
+        self.filename = os.path.split(path)[1]
+
+    def __getitem__(self, key):
+        path = os.path.join(self.path, key)
+        if not os.path.exists(path):
+            raise KeyError, "No file '%s' in '%s'" %(key, self.filename)
+        elif os.path.isdir(path):
+            value = Directory(path)
+        else:
+            value = File(path)
+        return value
+        
+    def get(self, key, default=None):
+        try:
+            return self.__getitem__(key)
+        except KeyError:
+            return default
+
+    def keys(self):
+        return os.listdir(self.path)
+
+    def items(self):
+        return [(key, self[key]) for key in self.keys()]
+
+    def values(self):
+        return [value for key, value in self.items()]
+        
+
+class File(object):
+    
+    def __init__(self, path):
+        self.path = path
+        self.filename = os.path.split(path)[1]
+
+    def read(self):
+        return open(self.path, 'r').read()
+
+if __name__ == '__main__':
+    path = sys.argv[1]
+    context = Context(Engine, {'root': Directory(path)})
+    while 1 == 1:
+        expr = raw_input("TALES Expr: ")
+        if expr == 'exit':
+            break
+        try:
+            bytecode = Engine.compile(expr)
+            print bytecode(context)
+        except Exception, error:
+            print error