python3学习手册 简介： Python官网： h�ps://www.python.org Python由Guido van Rossum于1989年底发明，于1991年发行第一版， Python源代码遵循GPL协议 Python是一种解释型、面向对象、动态数据类型、可交互的语言 python2.0于2000-10-16发布，于2020年1月1日停止更新2.x版本， Python-2.7成为最后一个py ①进入交互模式 # python3 #输入python3 回车 >>> #这里可执行python代码，类似shell脚本 >>> print("hello") >>> exit() #退出交互模式 ②执行一次性代码 # python3 -c " #内容如下3行 #!/usr/bin/env python3 # coding=u�-8 print("hello world") # chmod +x test.py #添加可执行权限 # python3脚本文件开头位置要指定以下2行（使用的python解释器及本 源码文件编码） #!/usr/bin/env python3 # coding=u�-8 # python2脚本文件里要指定以下2行

Python3 基础教程【完整版】 http://www.yeayee.com/ 1/531 Python3 基础教程 Python 教程 ................................................................................................................... 5 Python ......................................................................................... 135 Python3 基础教程【完整版】 http://www.yeayee.com/ 2/531 返回函数 .............................................. ......................................................................................... 267 Python3 基础教程【完整版】 http://www.yeayee.com/ 3/531 多线程 ...............................................

Python3的新特性和改进 杭州美登科技 杜逸先 目录 CONTENTS Python的现状 Python3的新特性和改进 迁移到Python3 问答环节 1 Python的现状 Python的现状 Python2.7将于2020年1月1日停止维护 Python的现状 Python2.7将于2020年1月1日停止维护 主流Python包陆续终止对Python2的支持 Python的现状 Python的现状 Python2.7将于2020年1月1日停止维护 主流Python包陆续终止对Python2的支持 Python的现状 Python 3.0 2008.11 开启Python3时代 Python的现状 Python 3.0 Python 3.1 2009.6 collections.OrderedDict collections.Counter Python的现状 2 Python3的新特性和改进 ——重要变化 Python3的新特性和改进——重要变化 Text Vs. Data Instead Of Unicode Vs. 8-bit 内容 类型 混合使用 Python3 Text Vs. Data str Vs. bytes ✖ Python2 Unicode Vs. 8-bit unicode Vs. str ✔ Python3的新特性和改进——重要变化

• docker exec -ti torch_bm bash -c "cd /tmp/resnet50 && python3 performance.py” • docker exec -ti torch_bm bash -c "cd /tmp/resnet50 && python3 performance.py --bf16" 首次执行会下载预训练模型 输出执行耗时 PyTorch BF16 • docker exec -ti torch_bm bash -c "cd /tmp/maskrcnn && python3 performance.py” • docker exec -ti torch_bm bash -c "cd /tmp/maskrcnn && python3 performance.py --bf16" • 验证 Mask R-CNN 预测结果 • docker exec exec -ti torch_bm bash -c "cd /tmp/maskrcnn && python3 validate.py” • docker exec -ti torch_bm bash -c "cd /tmp/maskrcnn && python3 validate.py --bf16" 推理时间 FP32 BF16 PyTorch BF16 加速演示 • 测试 Mask R-CNN

} ], “metadata”: { “kernelspec”: { “display_name”: “Python 3”, “language”: “python”, “name”: “python3” }, “language_info”: { “codemirror_mode”: { “name”: “ipython”, “version”: 3 }, “file_extension”: } ], “metadata”: { “kernelspec”: { “display_name”: “Python 3”, “language”: “python”, “name”: “python3” }, “language_info”: { “codemirror_mode”: { “name”: “ipython”, “version”: 3 }, “file_extension”: } ], “metadata”: { “kernelspec”: { “display_name”: “Python 3”, “language”: “python”, “name”: “python3” }, “language_info”: { “codemirror_mode”: { “name”: “ipython”, “version”: 3 }, “file_extension”:

} ], “metadata”: { “kernelspec”: { “display_name”: “Python 3”, “language”: “python”, “name”: “python3” }, “language_info”: { “codemirror_mode”: { “name”: “ipython”, “version”: 3 }, “file_extension”: } ], “metadata”: { “kernelspec”: { “display_name”: “Python 3”, “language”: “python”, “name”: “python3” }, “language_info”: { “codemirror_mode”: { “name”: “ipython”, “version”: 3 }, “file_extension”: } ], “metadata”: { “kernelspec”: { “display_name”: “Python 3”, “language”: “python”, “name”: “python3” }, “language_info”: { “codemirror_mode”: { “name”: “ipython”, “version”: 3 }, “file_extension”:

are on your system, run jupyter kernelspec list: $ jupyter kernelspec list Available kernels: python3 /home/takluyver/.local/lib/python3.6/site- packages/ipykernel/resources bash /home/takluyver/ like in the example above, is this default kernel. The default often does what you want, so if the python3 kernelspec points somewhere else and you can’t start a Python kernel, try deleting or renaming that Session. Default is your system username. MultiKernelManager.default_kernel_name : Unicode Default: 'python3' The name of the default kernel to start MultiKernelManager.kernel_manager_class : DottedObjectName

are on your system, run jupyter kernelspec list: $ jupyter kernelspec list Available kernels: python3 /home/takluyver/.local/lib/python3.6/site- packages/ipykernel/resources bash /home/takluyver/ like in the example above, is this default kernel. The default often does what you want, so if the python3 kernelspec points somewhere else and you can’t start a Python kernel, try deleting or renaming that Session. Default is your system username. MultiKernelManager.default_kernel_name : Unicode Default: 'python3' The name of the default kernel to start MultiKernelManager.kernel_manager_class : DottedObjectName

these are on your system, run jupyter kernelspec list: $ jupyter kernelspec list Available kernels: python3 /home/takluyver/.local/lib/python3.6/site-packages/ipykernel/resources bash /home/takluyver/.loc like in the example above, is this default kernel. The default often does what you want, so if the python3 kernelspec points somewhere else and you can’t start a Python kernel, try deleting or renaming that Session. Default is your system username. MultiKernelManager.default_kernel_name [Unicode] Default: 'python3' The name of the default kernel to start MultiKernelManager.kernel_manager_class [DottedObjectName]

these are on your system, run jupyter kernelspec list: $ jupyter kernelspec list Available kernels: python3 /home/takluyver/.local/lib/python3.6/site-packages/ipykernel/resources bash /home/takluyver/.loc like in the example above, is this default kernel. The default often does what you want, so if the python3 kernelspec points somewhere else and you can’t start a Python kernel, try deleting or renaming that Session. Default is your system username. MultiKernelManager.default_kernel_name [Unicode] Default: 'python3' The name of the default kernel to start MultiKernelManager.kernel_manager_class [DottedObjectName]