Update biFPN, Support COCO 2017, change Augmentation

[toandaominh1997]

• Update biFPN
• Support COCO 2017
• Change Augmentation

[pep8speaks]

Hello @toandaominh1997! Thanks for opening this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file datasets/__init__.py:

Line 4:32: W292 no newline at end of file

• In the file datasets/augmentation.py:

Line 15:80: E501 line too long (80 > 79 characters) Line 50:80: E501 line too long (108 > 79 characters) Line 51:80: E501 line too long (130 > 79 characters)

• In the file datasets/cocov2.py:

Line 19:11: W291 trailing whitespace Line 21:1: E302 expected 2 blank lines, found 0 Line 35:18: E221 multiple spaces before operator Line 35:80: E501 line too long (113 > 79 characters) Line 45:21: E221 multiple spaces before operator Line 46:25: E221 multiple spaces before operator Line 75:1: W293 blank line contains whitespace Line 76:69: W291 trailing whitespace Line 79:5: E303 too many blank lines (2) Line 81:13: E221 multiple spaces before operator Line 81:80: E501 line too long (98 > 79 characters) Line 90:80: E501 line too long (96 > 79 characters) Line 91:20: E221 multiple spaces before operator Line 105:23: E221 multiple spaces before operator Line 107:29: E221 multiple spaces before operator Line 108:24: E221 multiple spaces before operator Line 120:5: E303 too many blank lines (2) Line 130:1: E305 expected 2 blank lines after class or function definition, found 1 Line 130:12: E225 missing whitespace around operator Line 132:35: E251 unexpected spaces around keyword / parameter equals Line 132:37: E251 unexpected spaces around keyword / parameter equals Line 132:80: E501 line too long (123 > 79 characters)

• In the file datasets/visual_aug.py:

Line 4:32: W291 trailing whitespace Line 24:70: W291 trailing whitespace Line 25:80: E501 line too long (91 > 79 characters) Line 31:80: E501 line too long (89 > 79 characters) Line 34:80: E501 line too long (88 > 79 characters) Line 36:80: E501 line too long (101 > 79 characters) Line 36:102: W291 trailing whitespace Line 37:80: E501 line too long (109 > 79 characters) Line 38:80: E501 line too long (140 > 79 characters) Line 45:80: E501 line too long (93 > 79 characters) Line 49:1: E305 expected 2 blank lines after class or function definition, found 1 Line 52:80: E501 line too long (153 > 79 characters) Line 53:1: E302 expected 2 blank lines, found 0 Line 57:80: E501 line too long (111 > 79 characters) Line 58:29: E231 missing whitespace after ':' Line 62:1: E305 expected 2 blank lines after class or function definition, found 0 Line 63:28: W292 no newline at end of file

• In the file demo.py:

Line 56:22: E128 continuation line under-indented for visual indent Line 57:22: E128 continuation line under-indented for visual indent Line 58:22: E128 continuation line under-indented for visual indent Line 59:22: E128 continuation line under-indented for visual indent Line 60:22: E128 continuation line under-indented for visual indent Line 61:22: E124 closing bracket does not match visual indentation

• In the file models/bifpn.py:

Line 191:21: E225 missing whitespace around operator Line 210:22: W292 no newline at end of file

• In the file models/efficientdet.py:

Line 30:80: E501 line too long (82 > 79 characters) Line 31:33: E127 continuation line over-indented for visual indent Line 32:33: E127 continuation line over-indented for visual indent Line 35:80: E501 line too long (88 > 79 characters)

• In the file models/losses.py:

Line 27:80: E501 line too long (82 > 79 characters) Line 51:80: E501 line too long (80 > 79 characters)

• In the file train.py:

Line 13:80: E501 line too long (99 > 79 characters) Line 63:80: E501 line too long (121 > 79 characters) Line 93:80: E501 line too long (173 > 79 characters) Line 96:80: E501 line too long (110 > 79 characters) Line 97:80: E501 line too long (120 > 79 characters) Line 99:80: E501 line too long (176 > 79 characters) Line 142:80: E501 line too long (80 > 79 characters) Line 184:80: E501 line too long (97 > 79 characters)

• In the file utils/__init__.py:

Line 5:26: W292 no newline at end of file

• In the file utils/config_eff.py:

Line 17:2: W292 no newline at end of file