diff --git a/std_indic/cleaners.py b/std_indic/cleaners.py
index 32b5c7c..c853bea 100644
--- a/std_indic/cleaners.py
+++ b/std_indic/cleaners.py
@@ -1,108 +1,119 @@
 import re
 
-BYTE_ORDER_MARK='\uFEFF'
-BYTE_ORDER_MARK_2='\uFFFE'
-WORD_JOINER='\u2060'
-SOFT_HYPHEN='\u00AD'
+BYTE_ORDER_MARK = "\uFEFF"
+BYTE_ORDER_MARK_2 = "\uFFFE"
+WORD_JOINER = "\u2060"
+SOFT_HYPHEN = "\u00AD"
 
-ZERO_WIDTH_SPACE='\u200B'
-NO_BREAK_SPACE='\u00A0'
+ZERO_WIDTH_SPACE = "\u200B"
+NO_BREAK_SPACE = "\u00A0"
 
-ZERO_WIDTH_NON_JOINER='\u200C'
-ZERO_WIDTH_JOINER='\u200D'
+ZERO_WIDTH_NON_JOINER = "\u200C"
+ZERO_WIDTH_JOINER = "\u200D"
 
 
 def clean_text(text):
     text = text.lower()
-    text=text.replace(BYTE_ORDER_MARK,'')
-    text=text.replace(BYTE_ORDER_MARK_2,'')
-    text=text.replace(WORD_JOINER,'')
-    text=text.replace(SOFT_HYPHEN,'')
-
-    text=text.replace(ZERO_WIDTH_SPACE,' ') # ??
-    text=text.replace(NO_BREAK_SPACE,' ')
-
-    text=text.replace(ZERO_WIDTH_NON_JOINER, '')
-    text=text.replace(ZERO_WIDTH_JOINER,'')
-        
-    text = re.sub(r"[-()\"#/@;:<>{}-=~|.?,]","",text)
+    text = text.replace(BYTE_ORDER_MARK, "")
+    text = text.replace(BYTE_ORDER_MARK_2, "")
+    text = text.replace(WORD_JOINER, "")
+    text = text.replace(SOFT_HYPHEN, "")
+
+    text = text.replace(ZERO_WIDTH_SPACE, " ")  # ??
+    text = text.replace(NO_BREAK_SPACE, " ")
+
+    text = text.replace(ZERO_WIDTH_NON_JOINER, "")
+    text = text.replace(ZERO_WIDTH_JOINER, "")
+
+    text = re.sub(r"[-()\"#/@;:<>{}-=~|.?,]", "", text)
     return text
 
+
 def str_to_unicode(str):
-    return chr(int(str[2:],16))
+    return chr(int(str[2:], 16))
+
 
 class resolve_cotractions(object):
     def __init__(self, lang):
         super().__init__()
         self.lang = lang
-        self.contractions =  []
-        with open('./std_indic/contractions/'+lang+'.txt', 'r') as f:
+        self.contractions = []
+        with open("./std_indic/contractions/" + lang + ".txt", "r") as f:
             for line in f.readlines():
                 text = line.rstrip()
-                text = re.sub(r'\s+', r' ', text) 
-                self.contractions.append(text.split(' ', 1))
-            
+                text = re.sub(r"\s+", r" ", text)
+                self.contractions.append(text.split(" ", 1))
+
     def resolve_contractions(self, text):
         for contraction in self.contractions:
             text = text.replace(contraction[0], contraction[1])
         return text
 
- 
+
 class resolve_chars(object):
     def __init__(self, lang):
         super().__init__()
         self.lang = lang
         self.normalizations = []
-        with open('./std_indic/unicode_normalization/'+lang+'.txt', 'r') as f :
+        with open("./std_indic/unicode_normalization/" + lang + ".txt", "r") as f:
             content = f.read()
-            replacements = re.findall(r'\[.+\]', content)
-            for elem in replacements :
-                elem = elem.strip('[]')
-                elems = elem.split(' , ')
-                self.normalizations.append( [str_to_unicode(elems[0]), str_to_unicode(elems[1])] )
-    
-    def normalize(self, text) :
+            replacements = re.findall(r"\[.+\]", content)
+            for elem in replacements:
+                elem = elem.strip("[]")
+                elems = elem.split(" , ")
+                self.normalizations.append(
+                    [str_to_unicode(elems[0]), str_to_unicode(elems[1])]
+                )
+
+    def normalize(self, text):
         for norm in self.normalizations:
-            text = text.replace( norm[0], norm[1])
+            text = text.replace(norm[0], norm[1])
         return text
-    
+
+
 class resolve_group_chars(object):
     def __init__(self, lang):
         super().__init__()
         self.lang = lang
         self.replaces = []
-        with open('./std_indic/unicode_normalization/groups/'+lang+'.txt', 'r') as f :
+        with open(
+            "./std_indic/unicode_normalization/groups/" + lang + ".txt", "r"
+        ) as f:
             for line in f.readlines():
-                line = re.sub(r'\s+',r' ',line.rstrip())
-                line = line.split('#')[0].rstrip()
-                #print(line)
-                original, replacement = line.split(' ')
+                line = re.sub(r"\s+", r" ", line.rstrip())
+                line = line.split("#")[0].rstrip()
+                # print(line)
+                original, replacement = line.split(" ")
                 match_str = self.make_pattern(original)
                 repl_str = self.make_pattern(replacement, True)
                 print(match_str, repl_str)
-                self.replaces.append((match_str, repl_str)) 
-    
+                self.replaces.append((match_str, repl_str))
+
     def make_pattern(self, original, is_replacement=False):
-        original_parts = original.split(',')
-        match_str = ''
-        #print(original_parts)
+        original_parts = original.split(",")
+        match_str = ""
+        # print(original_parts)
         for part in original_parts:
             if is_replacement:
-                if not part.startswith('0x'):
-                    match_str += '\\g<'+part+'>'
+                if not part.startswith("0x"):
+                    match_str += "\\g<" + part + ">"
                 else:
                     match_str += str_to_unicode(part)
-            else :               
-                if '-' not in part:
-                    match_str += '('+str_to_unicode(part)+')'
+            else:
+                if "-" not in part:
+                    match_str += "(" + str_to_unicode(part) + ")"
                 else:
-                    match_str += '([' + str_to_unicode(part.split('-')[0]) + '-' + str_to_unicode(part.split('-')[1]) + '])'
+                    match_str += (
+                        "(["
+                        + str_to_unicode(part.split("-")[0])
+                        + "-"
+                        + str_to_unicode(part.split("-")[1])
+                        + "])"
+                    )
         return match_str
 
-    def normalize(self, text) :
+    def normalize(self, text):
         for norm in self.replaces:
             print(norm[0], norm[1])
-            text = re.sub( norm[0], norm[1], text)
+            text = re.sub(norm[0], norm[1], text)
         return text
- 
-