From 2952525d110884ebd6bd0fa197207ff1ef740b76 Mon Sep 17 00:00:00 2001
From: Yeongdo Park <ignis@postech.ac.kr>
Date: Fri, 31 Jan 2020 23:55:46 +0000
Subject: [PATCH] Create input preprocessor

---
 input-preprocessor.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 input-preprocessor.md

diff --git a/input-preprocessor.md b/input-preprocessor.md
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+itape.py is an input preprocessor to support run over loop with command line argument and compatibility.
+
+It has a hard-coded dictionary of default values for all arguments. 
+
+The default values in dictionary can be override with provided input file.
+
+
+
+## Use case 1 - Test Run
+```
+$ python itape.py | ./ex -
+```
+Run 1-D laminar flame calculation with hard-coded default values.
+
+## Use case 2 - Compatibility Run
+```
+$ python itape.py --default SOME_OLD_INPUTFILE | ./ex -
+```
+Run 1-D laminar flame calculation with old incompatible input file.
+
+## Use case 3 - Argument Run
+```
+$ python itape.py --dt 0.0001 | ./ex -
+```
+Run 1-D laminar flame calculation with hard-coded default values except dt.