add latex mismatch evaluation

evaluate_latex_mismatch.py

@@ -0,0 +1,44 @@
+import re
+import argparse
+
+parser = argparse.ArgumentParser()
+parser.add_argument('--latex_file', type=str, default=None, help='LaTeX file to be evaluated', required=True)
+opt = parser.parse_args()
+
+text = open(opt.latex_file, 'rb').read().decode(encoding='utf-8')
+# delete latex comments
+text = re.sub(r'(?<!\\)%.*?\n', '\n', text)
+
+begin_statements = ['\\begin', '{', '$$', '$']
+end_statements = ['\\end', '}', '$$', '$']
+math_delimiters = ['$$', '$']
+
+stack = []
+error_count = 0
+i = 0
+while i < len(text):
+    if not (i>0 and text[i-1] == '\\'):
+        for s_i in range(len(begin_statements)):
+            if text[i:].startswith(end_statements[s_i]):
+                if len(stack) > 0 and stack[-1] == s_i:
+                    stack.pop()
+                elif s_i in stack:
+                    stack.reverse()
+                    stack.remove(s_i)
+                    stack.reverse()
+                elif end_statements[s_i] in math_delimiters:
+                    stack.append(s_i)
+                else:
+                    error_count += 1
+                i += len(end_statements[s_i]) - 1
+                break
+            elif text[i:].startswith(begin_statements[s_i]):
+                stack.append(s_i)
+                i += len(begin_statements[s_i]) - 1
+                break 
+    
+    i += 1
+
+error_count += len(stack)
+print("Stack:", stack)
+print("Error Count (Number of Mismatched \\begin..\\end commands, group delimiters {..} and math mode delimiters $..$ $$..$$ ): %d" % error_count)