python-2to3

Installing BeautifulSoup4 via pip produces an import error for Python 3.5

由 China☆狼群 提交于 2019-12-12 01:24:24
问题 I'm trying to install beautifulsoup4 for Python 3.5, however, I've made it to when I call 'import bs4' to test in the Python 3.5.2 shell, I receive the error below: Traceback (most recent call last): File "", line 1, in import bs4 File "C:\Users\Dan\AppData\Local\Programs\Python\Python35\lib\bs4__init__.py", line 53 'You are trying to run the Python 2 version of Beautiful Soup under Python 3. This will not work.'<>'You need to convert the code, either by installing it ( python setup.py

2to3 ParseError in python file

由 血红的双手。 提交于 2019-12-11 12:28:03
问题 I tried running 2to3 on a python file however it is failing with following error, i am not able to understand where exactly in the problem any help is appreciated. [adsf@localhost direct]$ 2to3 ./views/statusformatter.py RefactoringTool: Skipping implicit fixer: buffer RefactoringTool: Skipping implicit fixer: idioms RefactoringTool: Skipping implicit fixer: set_literal RefactoringTool: Skipping implicit fixer: ws_comma RefactoringTool: Can't parse ./views/statusformatter.py: ParseError: bad

Is there anyway to install twain module in python 3

由 亡梦爱人 提交于 2019-12-11 01:46:12
问题 I want to install the Python TWAIN module in Python 3. But in the docs it says: Python versions 2.1 through 2.5 are supported. Can I convert it using 2to3 ? 回答1: Use past module which provides an experimental translation package to help with importing and using old Python 2 modules in a Python 3 environment. So install your package with pip pip3 install twain --no-compile # to ignore SyntaxErrors And use next code to import twain in your python3 code : from past import autotranslate

How to use/install python 2to3?

由 断了今生、忘了曾经 提交于 2019-12-10 12:32:36
问题 From this https://docs.python.org/3.4/library/2to3.html it says that 2to3 should be installed as a script alongside the python interpreter. However, in my /usr/bin/ folder there are no 2to3 executable, and running find from / finds no 2to3 executable either. I do however have a folder called lib2to3 at /usr/lib64/python{3.4/2.7}/lib2to3 but containing nothing I found relevant. In python/site-packages/setuptools/ there is a lib2to3_ex.py script, but nothing happens if I run it. How do I get to

Why does 2to3 change mydict.keys() to list(mydict.keys())?

由 别来无恙 提交于 2019-12-08 16:01:04
问题 I'm looking at an output from 2to3 that includes this change: - for file_prefix in output.keys(): + for file_prefix in list(output.keys()): where output is a dictionary. What is the significance of this change? Why does 2to3 do this? How does this change make the code Python 3 compatible? 回答1: In Python 3, the .keys() method returns a view object rather than a list, for efficiency's sake. In the iteration case, this doesn't actually matter, but where it would matter is if you were doing

AttributeError: 'DiGraph' object has no attribute '_node' [duplicate]

由 你说的曾经没有我的故事 提交于 2019-12-08 11:17:20
问题 This question already has an answer here : networkx DiGraph Attribute Error self._succ (1 answer) Closed last year . The code is written by someone else using Python 2.7.12, networkx 1.11, numpy 1.13.0, scipy 0.18.1, matplotlib 2.0.2. It consists of several self-made modules. I have converted the entire code to Python 3.x using "2to3" converter. I am running the entire code using Spyder which has all the latest packages. Now while running the code I am getting AttributeError: 'DiGraph' object

Porting a sub-class of python2 'file' class to python3

由 走远了吗. 提交于 2019-12-08 02:36:33
问题 I have a legacy code that calls class TiffFile(file) . What is the python3 way to call it? I tried to replace following in python2: class TiffFile(file): def __init__(self, path): file.__init__(self, path, 'r+b') By this in python3: class TiffFile(RawIOBase): def __init__(self, path): super(TiffFile, self).__init__(path, 'r+b') But now I am getting TypeError: object.__init__() takes no parameters 回答1: RawIOBase.__init__ does not take any arguments, that is where you error is. Your TiffFile

Which 2to3 fixers output valid Python 2 code?

由 点点圈 提交于 2019-12-07 01:50:37
问题 2to3 is a Python program that reads Python 2.x source code and applies a series of fixers to transform it into valid Python 3.x code Consider the forty fixers listed at https://docs.python.org/3.4/library/2to3.html#fixers . By design, they all output valid Python 3 code. Which output valid Python 2 code? For example, the fixer NE that "converts the old not-equal syntax <> to != " has this property, because != is valid Python 2 as well as Python 3. Whereas the fixer NONZERO that "Renames _

Which 2to3 fixers output valid Python 2 code?

由 微笑、不失礼 提交于 2019-12-05 09:30:43
2to3 is a Python program that reads Python 2.x source code and applies a series of fixers to transform it into valid Python 3.x code Consider the forty fixers listed at https://docs.python.org/3.4/library/2to3.html#fixers . By design, they all output valid Python 3 code. Which output valid Python 2 code? For example, the fixer NE that "converts the old not-equal syntax <> to != " has this property, because != is valid Python 2 as well as Python 3. Whereas the fixer NONZERO that "Renames __nonzero__ to __bool__ " does not have the property, because there is no function __bool__ in Python 2.7.

Using Z3Py With Python 3.3

由 别来无恙 提交于 2019-12-02 02:57:49
My Situation I've installed Microsoft Z3 ( Z3 [version 4.3.0 - 64 bit]. (C) 2006 ) and it's pyc binaries for Python2. I've written an Python3 package which needs access to z3 functionality. In order to be able to use the pyc binaries with my Python3 package, I decompyle the z3 binaries and applied 2to3 . My Problem Int('string') doesn't work because Z3Py isn't able to handle the new <class 'str'> used as 'string' argument: >>> import z3; z3.Int('abc') Traceback (most recent call last): File "<stdin>", line 1, in <module> File ".\bin\z3.py", line 2931, in Int return ArithRef(Z3_mk_const(ctx.ref
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