Pylint

examples/reconstruct_json.py

@@ -6,11 +6,12 @@
 #
 
 import json
-from .json_parser import json_grammar
 
 from lark import Lark
 from lark.reconstruct import Reconstructor
 
+from .json_parser import json_grammar
+
 def test():
 
     test_json = '''

lark/common.py

@@ -24,7 +24,7 @@ class UnexpectedToken(ParseError):
                    "Expected: %s\n"
                    "Context: %s" % (token, self.line, self.column, expected, context))
 
-        super(ParseError, self).__init__(message)
+        super(UnexpectedToken, self).__init__(message)
 
 
 

lark/indenter.py

@@ -8,7 +8,7 @@ class Indenter:
         self.indent_level = [0]
 
     def handle_NL(self, token):
-        if (self.paren_level > 0):
+        if self.paren_level > 0:
             return
 
         yield token

lark/lark.py

@@ -7,7 +7,7 @@ from collections import defaultdict
 from .utils import STRING_TYPE
 from .load_grammar import load_grammar
 from .tree import Tree
-from .common import GrammarError, LexerConf, ParserConf
+from .common import LexerConf, ParserConf
 
 from .lexer import Lexer
 from .parse_tree_builder import ParseTreeBuilder

lark/lexer.py

@@ -2,7 +2,7 @@
 
 import re
 
-from .utils import Str, classify, STRING_TYPE
+from .utils import Str, classify
 from .common import is_terminal, PatternStr, PatternRE, TokenDef
 
 class LexError(Exception):
@@ -13,7 +13,7 @@ class UnexpectedInput(LexError):
         context = seq[lex_pos:lex_pos+5]
         message = "No token defined for: '%s' in %r at line %d" % (seq[lex_pos], context, line)
 
-        super(LexError, self).__init__(message)
+        super(UnexpectedInput, self).__init__(message)
 
         self.line = line
         self.column = column

lark/load_grammar.py

@@ -3,7 +3,7 @@ from itertools import chain
 import re
 from ast import literal_eval
 
-from .lexer import Lexer, Token, UnexpectedInput
+from .lexer import Token, UnexpectedInput
 
 from .parse_tree_builder import ParseTreeBuilder
 from .parser_frontends import LALR
@@ -526,7 +526,7 @@ class GrammarLoader:
                 token_tree = dict(g.token_defs)[dotted_path[-1]]
                 token_defs.append([name.value, token_tree])
             else:
-                assert False, command
+                assert False, stmt
 
 
         # Verify correctness 1

lark/parser_frontends.py

@@ -5,7 +5,6 @@ from .lexer import Lexer, ContextualLexer, Token
 
 from .common import is_terminal, GrammarError, ParserConf
 from .parsers import lalr_parser, earley, nearley
-from .parsers.grammar_analysis import Rule
 from .tree import Transformer
 
 class WithLexer:
@@ -126,7 +125,7 @@ class Nearley_NoLex:
             if is_terminal(sym):
                 regexp = self.token_by_name[sym].pattern.to_regexp()
                 width = sre_parse.parse(regexp).getwidth()
-                if not width == (1,1):
+                if width != (1,1):
                     raise GrammarError('Dynamic lexing requires all tokens to have a width of 1 (%s is %s)' % (regexp, width))
                 yield sym, re.compile(regexp)
             else:
@@ -168,7 +167,7 @@ class Earley_NoLex:
             if is_terminal(sym):
                 regexp = self.token_by_name[sym].pattern.to_regexp()
                 width = sre_parse.parse(regexp).getwidth()
-                if not width == (1,1):
+                if width != (1,1):
                     raise GrammarError('Scanless parsing (lexer=None) requires all tokens to have a width of 1 (terminal %s: %s is %s)' % (sym, regexp, width))
                 yield (re.compile(regexp).match, regexp)
             else:

lark/parsers/nearley.py

@@ -1,6 +1,6 @@
 "My name is Earley"
 
-from ..utils import classify, STRING_TYPE
+from ..utils import classify
 from ..common import ParseError, UnexpectedToken
 
 try:

lark/reconstruct.py

@@ -5,7 +5,6 @@ from .tree import Tree
 from .common import is_terminal, ParserConf, PatternStr
 from .lexer import Token
 from .parsers import earley
-from .lark import Lark
 
 
 
@@ -68,7 +67,7 @@ class Reconstructor:
                 return to_write
 
         d = defaultdict(list)
-        for name, (expansions, options) in parser.rules.items():
+        for name, (expansions, _o) in parser.rules.items():
             for expansion, alias in expansions:
                 if alias:
                     d[alias].append(expansion)
@@ -104,4 +103,3 @@ class Reconstructor:
     def reconstruct(self, tree):
         return ''.join(self._reconstruct(tree))
 
-

lark/utils.py

@@ -60,7 +60,7 @@ def inline_args(f):
         return _f_func
     elif isinstance(f, (type, types.BuiltinFunctionType)):
         @functools.wraps(f)
-        def _f_builtin(self, args):
+        def _f_builtin(_self, args):
             return f(*args)
         return _f_builtin
     else: