[Python] Bring new code in line with subset of PEP 8 used in project

[practicalswift]

After this commit:

$ flake8
$

Before this commit:

$ flake8
./benchmark/scripts/compare_perf_tests.py:22:1: F401 'os' imported but unused
./benchmark/scripts/compare_perf_tests.py:25:8: E225 missing whitespace around operator
./benchmark/scripts/compare_perf_tests.py:28:8: E225 missing whitespace around operator
./benchmark/scripts/compare_perf_tests.py:29:8: E225 missing whitespace around operator
./benchmark/scripts/compare_perf_tests.py:30:9: E225 missing whitespace around operator
./benchmark/scripts/compare_perf_tests.py:31:9: E225 missing whitespace around operator
./benchmark/scripts/compare_perf_tests.py:32:9: E225 missing whitespace around operator
./benchmark/scripts/compare_perf_tests.py:34:7: E225 missing whitespace around operator
./benchmark/scripts/compare_perf_tests.py:35:12: E225 missing whitespace around operator
./benchmark/scripts/compare_perf_tests.py:36:15: E225 missing whitespace around operator
./benchmark/scripts/compare_perf_tests.py:42:15: F821 undefined name 'ScoreParserException'
./benchmark/scripts/compare_perf_tests.py:42:66: E226 missing whitespace around arithmetic operator
./benchmark/scripts/compare_perf_tests.py:51:23: E701 multiple statements on one line (colon)
./benchmark/scripts/compare_perf_tests.py:60:23: E701 multiple statements on one line (colon)
./benchmark/scripts/compare_perf_tests.py:93:26: E701 multiple statements on one line (colon)
./benchmark/scripts/compare_perf_tests.py:99:26: E701 multiple statements on one line (colon)
./benchmark/scripts/compare_perf_tests.py:102:26: E701 multiple statements on one line (colon)
./benchmark/scripts/compare_perf_tests.py:109:31: E226 missing whitespace around arithmetic operator
./benchmark/scripts/compare_perf_tests.py:112:25: E228 missing whitespace around modulo operator
./benchmark/scripts/compare_perf_tests.py:112:46: E226 missing whitespace around arithmetic operator
./benchmark/scripts/compare_perf_tests.py:112:58: E226 missing whitespace around arithmetic operator
./benchmark/scripts/compare_perf_tests.py:112:61: E226 missing whitespace around arithmetic operator
./benchmark/scripts/compare_perf_tests.py:117:27: E228 missing whitespace around modulo operator
./benchmark/scripts/compare_perf_tests.py:117:32: E226 missing whitespace around arithmetic operator
./benchmark/scripts/compare_perf_tests.py:168:15: E701 multiple statements on one line (colon)
./benchmark/scripts/compare_perf_tests.py:168:30: E702 multiple statements on one line (semicolon)
./benchmark/scripts/compare_perf_tests.py:174:18: E701 multiple statements on one line (colon)
./benchmark/scripts/compare_perf_tests.py:175:13: E701 multiple statements on one line (colon)
./benchmark/scripts/compare_perf_tests.py:180:25: E231 missing whitespace after ','
./benchmark/scripts/compare_perf_tests.py:182:25: E231 missing whitespace after ','
./benchmark/scripts/compare_perf_tests.py:190:12: E713 test for membership should be 'not in'
./benchmark/scripts/compare_perf_tests.py:193:12: E713 test for membership should be 'not in'
./benchmark/scripts/generate_harness/generate_harness.py:35:59: E127 continuation line over-indented for visual indent
./benchmark/scripts/generate_harness/generate_harness.py:47:29: E127 continuation line over-indented for visual indent
./benchmark/scripts/generate_harness/generate_harness.py:65:5: E301 expected 1 blank line, found 0
./benchmark/scripts/generate_harness/generate_harness.py:74:13: E126 continuation line over-indented for hanging indent
./benchmark/scripts/generate_harness/generate_harness.py:90:1: W391 blank line at end of file
./benchmark/scripts/perf_test_driver/perf_test_driver.py:16:1: F401 'sys' imported but unused
./benchmark/scripts/perf_test_driver/perf_test_driver.py:88:27: E226 missing whitespace around arithmetic operator
./benchmark/scripts/perf_test_driver/perf_test_driver.py:115:1: W391 blank line at end of file
./benchmark/utils/convertToJSON.py:65:8: E225 missing whitespace around operator
./benchmark/utils/convertToJSON.py:68:8: E225 missing whitespace around operator
./benchmark/utils/convertToJSON.py:69:9: E225 missing whitespace around operator
./benchmark/utils/convertToJSON.py:70:9: E225 missing whitespace around operator
./benchmark/utils/convertToJSON.py:78:16: F821 undefined name 'VERBOSE'
./benchmark/utils/convertToJSON.py:78:23: E701 multiple statements on one line (colon)
./benchmark/utils/convertToJSON.py:85:46: F821 undefined name 'parseFloat'
./benchmark/scripts/Benchmark_Driver:33:50: E502 the backslash is redundant between brackets
./benchmark/scripts/Benchmark_Driver:34:54: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:36:43: E502 the backslash is redundant between brackets
./benchmark/scripts/Benchmark_Driver:37:54: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:54:36: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:54:43: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:54:47: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:54:56: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:61:55: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:61:62: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:61:66: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:61:75: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:88:69: E502 the backslash is redundant between brackets
./benchmark/scripts/Benchmark_Driver:105:61: E502 the backslash is redundant between brackets
./benchmark/scripts/Benchmark_Driver:155:28: E231 missing whitespace after ','
./benchmark/scripts/Benchmark_Driver:155:38: E231 missing whitespace after ','
./benchmark/scripts/Benchmark_Driver:155:49: E231 missing whitespace after ','
./benchmark/scripts/Benchmark_Driver:155:60: E231 missing whitespace after ','
./benchmark/scripts/Benchmark_Driver:155:72: E231 missing whitespace after ','
./benchmark/scripts/Benchmark_Driver:156:30: E231 missing whitespace after ','
./benchmark/scripts/Benchmark_Driver:185:44: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:207:53: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:230:49: E226 missing whitespace around arithmetic operator
./benchmark/scripts/Benchmark_Driver:263:59: E221 multiple spaces before operator
./benchmark/scripts/Benchmark_Driver:264:21: E126 continuation line over-indented for hanging indent
./benchmark/scripts/Benchmark_Driver:326:73: E502 the backslash is redundant between brackets
./benchmark/scripts/Benchmark_Driver:348:73: E502 the backslash is redundant between brackets
./benchmark/scripts/Benchmark_GuardMalloc.in:47:35: E127 continuation line over-indented for visual indent
./benchmark/scripts/Benchmark_GuardMalloc.in:48:35: E127 continuation line over-indented for visual indent
./benchmark/scripts/Benchmark_GuardMalloc.in:49:35: E127 continuation line over-indented for visual indent
./benchmark/scripts/Benchmark_GuardMalloc.in:60:1: W391 blank line at end of file
./benchmark/scripts/Benchmark_RuntimeLeaksRunner.in:16:1: F401 're' imported but unused
./benchmark/scripts/Benchmark_RuntimeLeaksRunner.in:67:5: E301 expected 1 blank line, found 0
./benchmark/scripts/Benchmark_RuntimeLeaksRunner.in:78:13: F841 local variable 'status' is assigned to but never used
./benchmark/scripts/Benchmark_RuntimeLeaksRunner.in:79:13: F841 local variable 'output' is assigned to but never used
./benchmark/scripts/compare_perf_tests.py:        keys = [f for f in set(scores.keys())]
./benchmark/scripts/compare_perf_tests.py:    keys = [f for f in set(scores1.keys() + scores2.keys())]
./benchmark/scripts/generate_harness/generate_harness.py:            self.files = [x for x in os.listdir(path)
$