Hello @chrisguida! Thanks for opening this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file blockchain_parser/blockchain.py:

Line 45:1: E302 expected 2 blank lines, found 1
Line 47:80: E501 line too long (81 > 79 characters)

• In the file blockchain_parser/transaction.py:

Line 14:80: E501 line too long (80 > 79 characters)
Line 68:80: E501 line too long (82 > 79 characters)

• In the file blockchain_parser/undo.py:

Line 14:1: E302 expected 2 blank lines, found 1
Line 49:80: E501 line too long (87 > 79 characters)
Line 60:72: W291 trailing whitespace
Line 72:80: E501 line too long (107 > 79 characters)
Line 87:80: E501 line too long (108 > 79 characters)
Line 118:80: E501 line too long (84 > 79 characters)
Line 127:80: E501 line too long (101 > 79 characters)
Line 135:1: W293 blank line contains whitespace
Line 136:5: E303 too many blank lines (2)
Line 144:1: E303 too many blank lines (3)
Line 171:80: E501 line too long (110 > 79 characters)
Line 174:80: E501 line too long (83 > 79 characters)

• In the file blockchain_parser/utils.py:

Line 87:80: E501 line too long (99 > 79 characters)
Line 101:1: W293 blank line contains whitespace
Line 110:42: E228 missing whitespace around modulo operator
Line 122:80: E501 line too long (117 > 79 characters)
Line 129:80: E501 line too long (97 > 79 characters)

• In the file examples/undo-blocks.py:

Line 14:80: E501 line too long (90 > 79 characters)

🎉