Updated readme

README.md

@@ -14,26 +14,68 @@ Several nodes with varying numbers of optional inputs that can be used
 in conjunction with a formatting string to create the output. The node
 uses standard [python string formatting][1].
 
-**Example**
-```text
-Input:
-- arg0: "John"
-- arg1: 42
-
-Format:
-"Hello, {arg0}! Did you know? {arg1} is the answer to everything."
-
-Output:
-"Hello, John! Did you know? 42 is the answer to everything."
-```
-
 The nodes are useful to compose prompts based on variable inputs and
 can be combined with [dynamic prompts][2] for even more flexibility.
 
+**Example**
+
+Insert values into a string.
+
+Format
+```text
+"Hello, {arg0}! Did you know? {arg1} is the answer to everything."
+```
+
+Input
+```text
+arg0: "John"
+arg1: 42
+```
+
+Output
+```text
+"Hello, John! Did you know? 42 is the answer to everything."
+```
+
 ### ATOI/ITOA
 
 Two simple nodes to convert strings to integers and vice versa.
 
+### Python Text Script
+
+A node that takes a number of inputs as well as a Python script that
+takes the given arguments to produce a result. Intended as a brute-
+force method in cases where a general purpose formatter might not
+cut it and no dedicated node is available. The value assigned to
+the `result` variable inside the script will be returned by the
+node.
+
+**Example**
+
+Return a description based on a numeric input.
+
+Script
+```python
+age = int(arg0)
+
+if age < 13:
+    result = "a nice child"
+elif age < 22:
+    result = "an angsty teenager"
+else:
+    result = "a mature adult"
+```
+
+Input
+```text
+arg0: 17
+```
+
+Onput
+```text
+"an angsty teenager"
+```
+
 
 [1]: https://docs.python.org/3/tutorial/inputoutput.html
 [2]: https://github.com/exectails/comfyui-et_dynamicprompts