diff --git a/hb_internal/build/build.py b/hb_internal/build/build.py
index 1fae08a4fc18c542f9313abc93953eedf9c22e0f..d42af7ade51210b36540a3eef906313a4c054be4 100644
--- a/hb_internal/build/build.py
+++ b/hb_internal/build/build.py
@@ -121,9 +121,11 @@ def add_options(parser):
     parser.add_argument('--disable-part-of-post-build',
                         default=[],
                         nargs='*',
-                        help='it will skip part of post build process, which includes output_part_rom_status, stat_ccache, generate_ninja_trace, get_warning_list, compute_overlap_rate. '
+                        help='it will skip part of post build process, which includes output_part_rom_status, \
+                        stat_ccache, generate_ninja_trace, get_warning_list, compute_overlap_rate. '
                         'you can choose which subprocess to skip by passing in parameters. '
-                        'eg:--disable-part-of-post-build output_part_rom_status --disable-part-of-post-build stat_ccache')
+                        'eg:--disable-part-of-post-build output_part_rom_status \
+                        --disable-part-of-post-build stat_ccache')
     parser.add_argument('--device-type',
                         help='specifies device type',
                         default='default')
diff --git a/hb_internal/preloader/parse_vendor_product_config.py b/hb_internal/preloader/parse_vendor_product_config.py
index ed3c2e1bb47489901f67a98bd756be454461398a..7ff2ceb2206c486f142b8d38582570fa82543724 100644
--- a/hb_internal/preloader/parse_vendor_product_config.py
+++ b/hb_internal/preloader/parse_vendor_product_config.py
@@ -30,7 +30,7 @@ def get_features(features):
             print("Warning: invalid feature [" + feat + "]")
             continue
         key = feat[:match].strip()
-        val = feat[match+1:].strip().strip('"')
+        val = feat[match + 1:].strip().strip('"')
         if val == 'true':
             feats[key] = True
         elif val == 'false':
@@ -44,6 +44,7 @@ def get_features(features):
     pairs['features'] = feats
     return pairs
 
+
 def get_syscap(syscap):
     feats = {}
     for feat in syscap:
@@ -53,7 +54,7 @@ def get_syscap(syscap):
             raise Exception("Error: invalid syscap [{}]".format(feat))
         match = feat.index("=")
         key = feat[:match].strip()
-        val = feat[match+1:].strip().strip('"')
+        val = feat[match + 1:].strip().strip('"')
         if val == 'true':
             feats[key] = True
         elif val == 'false':
@@ -67,6 +68,7 @@ def get_syscap(syscap):
     pairs['syscap'] = feats
     return pairs
 
+
 def get_exclusion_modules(exclusions):
     pairs = dict()
     pairs['exclusions'] = exclusions
@@ -97,7 +99,7 @@ def from_ss_to_parts(subsystems):
                     parts.get('{}:{}'.format(ss_name, com_name)).update(pairs)
                 # Copy other key-values
                 for key, val in com.items():
-                    if key in [ 'component', 'features', 'syscap', 'exclusions' ]:
+                    if key in ['component', 'features', 'syscap', 'exclusions']:
                         continue
                     parts['{}:{}'.format(ss_name, com_name)][key] = val
     return parts
diff --git a/hb_internal/preloader/preloader.py b/hb_internal/preloader/preloader.py
index 063166c8165f353bc797bbe647450cb61bb16036..b11aaeda58215e521708740da931b282962822c0 100755
--- a/hb_internal/preloader/preloader.py
+++ b/hb_internal/preloader/preloader.py
@@ -130,6 +130,7 @@ def _output_parts_features(all_parts, output_file):
     dump_json_file(output_file, parts_feature_info)
     return all_features
 
+
 def _output_parts_syscap(all_parts, output_file):
     all_syscap = {}
     part_syscap_map = {}
diff --git a/run_shell_cmd.py b/run_shell_cmd.py
index 7a3ca2372ff4d8774797e1d8f164920079f9bcea..adcfed5bfa916335b6ab76fc98ba2e4f8a1609ca 100755
--- a/run_shell_cmd.py
+++ b/run_shell_cmd.py
@@ -20,7 +20,7 @@ import sys
 
 
 def main():
-    return subprocess.Popen(' '.join(sys.argv[1:]),shell=True).wait()
+    return subprocess.Popen(' '.join(sys.argv[1:]), shell=True).wait()
 
 
 if __name__ == '__main__':