tests: lint wycheproof's python script

This PR lints tests_wycheproof_generate.py according to bitcoin's
python linting scripts. This is a follow-up to PR bitcoin-core#1245.

tools/tests_wycheproof_generate.py

@@ -7,8 +7,6 @@
 '''
 
 import json
-import hashlib
-import urllib.request
 import sys
 
 filename_input = sys.argv[1]
@@ -19,7 +17,8 @@
 num_groups = len(doc['testGroups'])
 
 def to_c_array(x):
- if x == "": return ""
+ if x == "":
+ return ""
  s = ',0x'.join(a+b for a,b in zip(x[::2], x[1::2]))
  return "0x" + s
 
@@ -43,18 +42,23 @@ def to_c_array(x):
  sig_size = len(test_vector['sig']) // 2
  msg_size = len(test_vector['msg']) // 2
 
- if test_vector['result'] == "invalid": expected_verify = 0
- elif test_vector['result'] == "valid": expected_verify = 1
- else: raise ValueError("invalid result field")
+ if test_vector['result'] == "invalid":
+ expected_verify = 0
+ elif test_vector['result'] == "valid":
+ expected_verify = 1
+ else:
+ raise ValueError("invalid result field")
 
- if num_vectors != 0 and sig_size != 0: signatures += ",\n "
+ if num_vectors != 0 and sig_size != 0:
+ signatures += ",\n "
 
  new_msg = False
  msg = to_c_array(test_vector['msg'])
  msg_offset = offset_msg_running
  # check for repeated msg
  if msg not in cache_msgs.keys():
- if num_vectors != 0 and msg_size != 0: messages += ",\n "
+ if num_vectors != 0 and msg_size != 0:
+ messages += ",\n "
  cache_msgs[msg] = offset_msg_running
  messages += msg
  new_msg = True
@@ -66,7 +70,8 @@ def to_c_array(x):
  pk_offset = offset_pk_running
  # check for repeated pk
  if pk not in cache_public_keys.keys():
- if num_vectors != 0: public_keys += ",\n "
+ if num_vectors != 0:
+ public_keys += ",\n "
  cache_public_keys[pk] = offset_pk_running
  public_keys += pk
  new_pk = True
@@ -83,8 +88,10 @@ def to_c_array(x):
  offset_sig,
  sig_size,
  expected_verify) + " },\n"
- if new_msg: offset_msg_running += msg_size
- if new_pk: offset_pk_running += 65
+ if new_msg:
+ offset_msg_running += msg_size
+ if new_pk:
+ offset_pk_running += 65
  offset_sig += sig_size
  num_vectors += 1