fix linting issues + make spec builder remove comments in container re-initialization part

scripts/build_spec.py

@@ -106,6 +106,18 @@ def apply_constants_preset(preset: Dict[str, Any]) -> None:
 '''
 
 
+def strip_comments(raw: str) -> str:
+    comment_line_regex = re.compile('^\s+# ')
+    lines = raw.split('\n')
+    out = []
+    for line in lines:
+        if not comment_line_regex.match(line):
+            if '  #' in line:
+                line = line[:line.index('  #')]
+            out.append(line)
+    return '\n'.join(out)
+
+
 def objects_to_spec(functions: Dict[str, str],
                     custom_types: Dict[str, str],
                     constants: Dict[str, str],
@@ -133,7 +145,8 @@ def objects_to_spec(functions: Dict[str, str],
     ssz_objects_instantiation_spec = '\n\n'.join(ssz_objects.values())
     ssz_objects_reinitialization_spec = (
         'def init_SSZ_types() -> None:\n    global_vars = globals()\n\n    '
-        + '\n\n    '.join([re.sub(r'(?!\n\n)\n', r'\n    ', value[:-1]) for value in ssz_objects.values()])
+        + '\n\n    '.join([strip_comments(re.sub(r'(?!\n\n)\n', r'\n    ', value[:-1]))
+                           for value in ssz_objects.values()])
         + '\n\n'
         + '\n'.join(map(lambda x: '    global_vars[\'%s\'] = %s' % (x, x), ssz_objects.keys()))
     )

specs/core/0_beacon-chain.md

@@ -533,7 +533,7 @@ class BeaconState(Container):
     randao_mixes: Vector[Hash, EPOCHS_PER_HISTORICAL_VECTOR]
     active_index_roots: Vector[Hash, EPOCHS_PER_HISTORICAL_VECTOR]  # Digests of the active registry, for light clients
     # Slashings
-    slashed_balances: Vector[Gwei, EPOCHS_PER_SLASHED_BALANCES_VECTOR]  # Sums of the effective balances of slashed validators
+    slashed_balances: Vector[Gwei, EPOCHS_PER_SLASHED_BALANCES_VECTOR]  # Sums of the slashed effective balances
     # Attestations
     previous_epoch_attestations: List[PendingAttestation, MAX_ATTESTATIONS * SLOTS_PER_EPOCH]
     current_epoch_attestations: List[PendingAttestation, MAX_ATTESTATIONS * SLOTS_PER_EPOCH]
@@ -1525,7 +1525,8 @@ def process_slashings(state: BeaconState) -> None:
     total_penalties = total_at_end - total_at_start
 
     for index, validator in enumerate(state.validators):
-        if validator.slashed and current_epoch == validator.withdrawable_epoch - EPOCHS_PER_SLASHED_BALANCES_VECTOR // 2:
+        if validator.slashed and current_epoch == (
+                validator.withdrawable_epoch - EPOCHS_PER_SLASHED_BALANCES_VECTOR // 2):
             penalty = max(
                 validator.effective_balance * min(total_penalties * 3, total_balance) // total_balance,
                 validator.effective_balance // MIN_SLASHING_PENALTY_QUOTIENT

test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py

@@ -319,7 +319,7 @@ class BaseList(list, Elements):
 
     def last(self):
         # be explict about getting the last item, for the non-python readers, and negative-index safety
-        return self[len(self)-1]
+        return self[len(self) - 1]
 
 
 class List(BaseList):