Refactor js2c.py and eliminate related pylint warnings (#1728)

JerryScript-DCO-1.0-Signed-off-by: Robert Sipka rsipka.uszeged@partner.samsung.com

tools/unicode_ranges.py

@@ -27,8 +27,6 @@
 # separators:              Zs
 
 from __future__ import print_function
-from settings import PROJECT_DIR
-from unicode_c_source import Source
 
 import argparse
 import bisect
@@ -37,6 +35,9 @@ import itertools
 import os
 import sys
 
+from c_source_helper import UniCodeSource
+from settings import PROJECT_DIR
+
 RANGES_C_SOURCE = os.path.join(PROJECT_DIR, 'jerry-core/lit/lit-unicode-ranges.inc.h')
 
 def main():
@@ -65,7 +66,7 @@ def main():
     non_letter_tables = split_list(list(ranges(non_letters)))
     separator_tables = split_list(list(ranges(separators)))
 
-    c_source = Source(script_args.c_source)
+    c_source = UniCodeSource(script_args.c_source)
 
     header_completion = ["/* This file is automatically generated by the %s script" % os.path.basename(__file__),
                          " * from %s. Do not edit! */" % os.path.basename(script_args.unicode_data),
@@ -181,9 +182,7 @@ def read_categories(unicode_data_file):
     separators = []
 
     with open(unicode_data_file) as unicode_data:
-        unicode_data_reader = csv.reader(unicode_data, delimiter=';')
-
-        for line in unicode_data_reader:
+        for line in csv.reader(unicode_data, delimiter=';'):
             unicode_id = int(line[0], 16)
 
             # Skip supplementary planes and ascii chars