root@ubuntu:~/test2to3#2to3-2.7[-w] ./ RefactoringTool:Skippingoptionalfixer: buffer RefactoringTool:Skippingoptionalfixer: idioms RefactoringTool:Skippingoptionalfixer: set_literal RefactoringTool:Skippingoptionalfixer: ws_comma RefactoringTool:No changesto./pkg/p_demo.py RefactoringTool:No changesto....
Use caniusepython3 to find out which of your dependencies are blocking your use of Python 3 (pip install caniusepython3) Once your dependencies are no longer blocking you, use continuous integration to make sure you stay compatible with Python 2 & 3 (tox can help test against multiple ver...
However, migrating over to Python 3 can be an annoying task! It’s not a simple “push button” upgrade because Python 3 is not backward compatible with Python 2. You will have to make code-level changes once you update, but if you intend to keep supporting your application, you don’...
(1)使用Windows 命令提示符(cmd)打开2to3.py脚本所在位置,如下图: 按指定代码转换 (2)在cmd的控制台环境下,先定位到你的2to3.py文件所在的路径,比如D:\Anaconda3\Tools\scripts包含了这个文件。然后输入命令: D:\Anaconda3\Tools\scripts>python 2to3.py -w G:\Google下载\machinelearninginaction\Ch06\s...
Python 3 系统默认使用的就是utf-8编码,所以对于使用的是Python3的情况,就不需要sys.setdefaultencoding(“utf-8”)这段代码,而Python 3 的 sys 库里面也已经没有 setdefaultencoding() 函数了。 4、reload()函数 在Python2中,reload()是内置函数 Python3中,reload()被转移到imp模块以及importlib中 Python3.4之...
input files. Requires -n.20-W, --write-unchanged-files21Also write files evenifno changes were required22(useful with --output-dir); implies -w.23--add-suffix=ADD_SUFFIX24Appendthisstringto all output filenames. Requires25-nifnon-empty. ex: --add-suffix='3'will generate26.py3 files...
Use caniusepython3 to find out which of your dependencies are blocking your use of Python 3 (pip install caniusepython3)Once your dependencies are no longer blocking you, use continuous integration to make sure you stay compatible with Python 2 & 3 (tox can help test against multiple ...
Run the 2to3 tool on the app The 2to3 tool is located in${PHANTOM_HOME}/bin Run the following command: [phantom@phantom <app-dir>]$ phenv 2to3 <app-name>_connector.py This will output the recommended changes to make the code Python 3 compatible. ...
Python 3 has been out for over a decade and is widely used around the world. In this course, you will learn how to migrate from Python 2 to Python 3 and how to benefit from Python 3's improved features and performance. by Anthony Shaw ...
Python 2.x版本,比如我安装的Python 2.7.2,其在windows下载安装好之后,就自带了相关的一些有用的工具。 其中一个叫做2to3.py,就是用来帮你实现,将Python 2.x的代码,转换为Python 3.x的代码的。 其位置位于:Python安装的根目录F:\Python34\Tools\Scripts\2to3.py ...