start working on a text render

textRender.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+# encoding: utf-8
+
+from generic import Stack
+
+
+def post2in_fix(postfix_tokens):
+    """ From the postfix_tokens list compute the corresponding infix_tokens list
+    
+    @param postfix_tokens: the postfix list of tokens to transform into infix form. If nothing is set, it takes the value self.postfix_tokens
+    @return: the corresponding infix list of tokens if postfix_tokens is set. nothing otherwise but stock it in self.infix_tokens
+
+    >>> post2in_fix([2, 5, '+', 1, '-', 3, 4, '*', '/'])
+    ['( ', 2, '+', 5, '-', 1, ' )', '/', '( ', 3, '*', 4, ' )']
+    """
+    operandeStack = Stack()
+
+    for token in postfix_tokens:
+        if self.isOperator(token):
+            op2 = operandeStack.pop()
+            if self.needPar(op2, token, "after"):
+                op2 = ["( ", op2, " )"]
+            op1 = operandeStack.pop()
+            if self.needPar(op1, token, "before"):
+                op1 = ["( ", op1, " )"]
+            res = [op1, token, op2]
+
+            operandeStack.push(res)
+
+        else:
+            operandeStack.push(token)
+
+    infix_tokens = flatten_list(operandeStack.pop())
+
+    return infix_tokens
+
+def textRender(postfix_tokens):
+    """ A text baser render
+
+    :param postfix_tokens: The postfix list of tokens
+    :returns: the text expression
+
+    """
+    infix_tokens = post2in_fix(postfix_tokens)
+    return ' '.join(infix_tokens)
+
+if __name__ == '__main__':
+    
+    import doctest
+    doctest.testmod()
+
+# -----------------------------
+# Reglages pour 'vim'
+# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
+# cursor: 16 del