latest version of black doesn't support py27

python/jsbeautifier/javascript/beautifier.py

@@ -1462,16 +1462,12 @@ class Beautifier:
             elif self._flags.last_token.type == TOKEN.OPERATOR:
                 # a++ + ++b
                 # a - -b
-                space_before = (
-                    current_token.text
-                    in [
-                        "--",
-                        "-",
-                        "++",
-                        "+",
-                    ]
-                    and self._flags.last_token.text in ["--", "-", "++", "+"]
-                )
+                space_before = current_token.text in [
+                    "--",
+                    "-",
+                    "++",
+                    "+",
+                ] and self._flags.last_token.text in ["--", "-", "++", "+"]
                 # + and - are not unary when preceeded by -- or ++ operator
                 # a-- + b
                 # a * +b
@@ -1591,6 +1587,9 @@ class Beautifier:
         else:
             self.handle_whitespace_and_comments(current_token, True)
 
+        if re.search(self._flags.last_token.text, "^[0-9]+$"):
+            self._flags.whitespace_before = True
+
         if reserved_array(self._flags.last_token, _special_word_set):
             self._output.space_before_token = False
         else:

python/jsbeautifier/unpackers/packer.py

@@ -157,5 +157,5 @@ class Unbaser(object):
         """Decodes a  value to an integer."""
         ret = 0
         for index, cipher in enumerate(string[::-1]):
-            ret += (self.base ** index) * self.dictionary[cipher]
+            ret += (self.base**index) * self.dictionary[cipher]
         return ret

python/pyproject.toml

@@ -1,5 +1,5 @@
 [tool.black]
-target-version = ['py27', 'py36', 'py37', 'py38']
+target-version = ['py36', 'py37', 'py38']
 exclude = '''
 /(
     \.eggs