diff --git a/.gitignore b/.gitignore
index 5d947ca8..7a68a23c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,186 @@ bin-release/
 # Project files, i.e. `.project`, `.actionScriptProperties` and `.flexProperties`
 # should NOT be excluded as they contain compiler settings and other important
 # information for Eclipse / Flash Builder.
+
+# Swap
+[._]*.s[a-v][a-z]
+!*.svg  # comment out if you don't need vector files
+[._]*.sw[a-p]
+[._]s[a-rt-v][a-z]
+[._]ss[a-gi-z]
+[._]sw[a-p]
+
+# Session
+Session.vim
+Sessionx.vim
+
+# Temporary
+.netrwhist
+*~
+# Auto-generated tag files
+tags
+# Persistent undo
+[._]*.un~
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/latest/usage/project/#working-with-version-control
+.pdm.toml
+.pdm-python
+.pdm-build/
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
diff --git a/4-Object_Detection/YOLOV3/.gitignore b/4-Object_Detection/YOLOV3/.gitignore
new file mode 100644
index 00000000..42be3410
--- /dev/null
+++ b/4-Object_Detection/YOLOV3/.gitignore
@@ -0,0 +1,3 @@
+checkpoint
+yolov3.data*
+yolov3.index
diff --git a/4-Object_Detection/YOLOV3/data/.gitignore b/4-Object_Detection/YOLOV3/data/.gitignore
new file mode 100644
index 00000000..80dd262d
--- /dev/null
+++ b/4-Object_Detection/YOLOV3/data/.gitignore
@@ -0,0 +1 @@
+log/
diff --git a/4-Object_Detection/YOLOV3/data/dataset/.gitignore b/4-Object_Detection/YOLOV3/data/dataset/.gitignore
new file mode 100644
index 00000000..bbc94096
--- /dev/null
+++ b/4-Object_Detection/YOLOV3/data/dataset/.gitignore
@@ -0,0 +1,4 @@
+test/
+train/
+yymnist_train.txt
+yymnist_test.txt
diff --git a/4-Object_Detection/YOLOV3/data/dataset/yymnist_test.txt b/4-Object_Detection/YOLOV3/data/dataset/yymnist_test.txt
deleted file mode 100644
index d2a6ea1f..00000000
--- a/4-Object_Detection/YOLOV3/data/dataset/yymnist_test.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-/home/yang/test/TensorFlow2.0-Examples/4-Object_Detection/YOLOV3/data/dataset/test/000001.jpg 122,187,136,201,7 71,209,85,223,4 78,7,100,29,2 366,244,394,272,3 344,383,372,411,3 238,243,294,299,8 24,233,136,345,8
-/home/yang/test/TensorFlow2.0-Examples/4-Object_Detection/YOLOV3/data/dataset/test/000002.jpg 343,279,357,293,4 258,168,280,190,7 277,354,333,410,6 5,24,61,80,3 124,227,152,255,9 140,285,224,369,3 105,42,217,154,4
-/home/yang/test/TensorFlow2.0-Examples/4-Object_Detection/YOLOV3/data/dataset/test/000003.jpg 285,100,313,128,2 99,16,183,100,1
-/home/yang/test/TensorFlow2.0-Examples/4-Object_Detection/YOLOV3/data/dataset/test/000004.jpg 365,140,387,162,0 70,332,92,354,1 278,373,292,387,0 341,14,383,56,0 10,143,52,185,8 214,109,242,137,1 112,282,140,310,0 312,130,368,186,0 180,180,236,236,3 271,192,383,304,2 20,10,132,122,4 66,147,150,231,4
-/home/yang/test/TensorFlow2.0-Examples/4-Object_Detection/YOLOV3/data/dataset/test/000005.jpg 194,13,216,35,9 126,34,168,76,2 80,183,108,211,6 341,332,397,388,6
-/home/yang/test/TensorFlow2.0-Examples/4-Object_Detection/YOLOV3/data/dataset/test/000006.jpg 251,179,265,193,9 22,43,36,57,8 315,132,337,154,4 155,372,197,414,4 239,18,295,74,1 89,53,131,95,1 81,296,165,380,1 208,257,320,369,9 86,173,170,257,7