Update README.md

README.md

@@ -30,6 +30,17 @@ In order to use 'palobert-base-greek-social-media', the text needs to be pre-pro
 * convert to lowercase
 * remove all punctuation
 
+```python
+import re
+import unicodedata
+
+def preprocess(text, default_replace=""):
+  text = text.lower()
+  text = unicodedata.normalize('NFD',text).translate({ord('\N{COMBINING ACUTE ACCENT}'):None})
+  text = re.sub(r'[^\w\s]', default_replace, text)
+  return text
+```
+
 ## Load Model
 
 ```python