python-2to3

问题 After converting to Python 3.x using 2to3 (see my previous question), I get this error during the build: File "setup.py", line 28, in <module> from . import mof_compiler ValueError: Attempted relative import in non-package The code: from . import mof_compiler mof_compiler._build() But I don’t know why this is wrong, since mof_compiler is in the same dir as setup.py . Please help! 回答1: Since there is no __init__.py , the working directory is a non-package. You don't need a relative import. Or.

问题 From the Python 2to3 doc: input : Converts input(prompt) to eval(input(prompt)) I am currently trying to learn Python 3 after a few years working with Python 2. Can anybody please explain why the tool inserts eval before the call to input , and whether I should do so in all my Python 3 code? 回答1: python 2's old input behavior has been removed, python 3's current input was what was previously named raw_input. raw_input and python 3 input always returns a string, unlike input which tries to

问题 I wrote own fixer, how can i run it? I don't find obvious way to do this. Only this: > cd /usr/lib/python2.7/lib2to3/fixes/ > ln -s path/to/my_fixer.py And then run it: > cd path/to/project > 2to3 -f my_fixer . 回答1: I got it! (file: my2to3) #!/usr/bin/env python2.7 import sys from lib2to3.main import main sys.path.append('path/to/my_own_package') sys.exit(main('my_own_package.contained_fixers')) And then run it: > ./my2to3 -f my_fixer -w project 回答2: Create a directory /mypath/custom_fixers

问题 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 "

问题 I tried to modify the sintax using 2to3 tool by running command python C:\Python32\Tools\scripts\2to3.py neo4j.py and got the output When opening neo4j.py however I noticed there hasn't been anything changed. Below is the block of code where changes (accoridng to output) should be made: try: import json except ImportError: import simplejson as json try: from urllib.parse import quote except ImportError: from urllib import quote try: from . import rest, batch, cypher except ImportError: import

问题 StringIO is the file-like string buffer object we use when reading pandas dataframe from text, e.g. "How to create a Pandas DataFrame from a string?" Which of these two imports should we use for StringIO (within pandas)? This is a long-running question that has never been resolved over four years. StringIO.StringIO (Python 2) / io.StringIO (Python 3) Advantages: more stable for futureproofing code, but forces us to version-fork, e.g. see code at bottom from EmilH. pandas.compat.StringIO

问题 This question already has answers here : Why do I need 'b' to encode a string with Base64? (6 answers) Closed 2 years ago . Hi I am having trouble with this error message. I am new to Python and this Python2 and Python3 is a hassle. I'm not sure what to do here, the error message is as shown below. Using Ticker: AAPL Traceback (most recent call last): File "realtime.py", line 18, in <module> r=requests.get(auth_url, headers={"Authorization": "Basic %s" % base64.b64encode(os.environ['INTRINIO

问题 I have some code in python 2.7 and I want to convert it all into python 3.3 code. I know 2to3 can be used but I am not sure exactly how to use it. Thanks for any help 回答1: As it is written on 2to3 docs, to translate an entire project from one directory tree to another, use: $ 2to3 --output-dir=python3-version/mycode -W -n python2-version/mycode 回答2: If you don't have 2to3 on your path, you can directly invoke lib2to3 : python -m lib2to3 directory\file.py And as the docs (and other answers)

问题 I'm just starting a new Python project, and ideally I'd like to offer Python 2 and 3 support from the start, with minimal developmental overhead. My question is, what is the best way of doing this for brand new projects? I have come across projects that run 2to3, or even 3to2, as part of their installation script. This seems to be a very common way. However, there seems to be several different ways of doing this. I also came across Distribute. There is also the option of trying to write

问题 I'm refactoring some python2 code and changing it to python3 using 2to3 module. I've received following parse error: RefactoringTool: There was 1 error: RefactoringTool: Can't parse ./helpers/repo.py: ParseError: bad input: type=22, value='=', context=(' ', (45, 25)) Here is a code that yields the error: except ImportError as error_msg: # pragma: no cover print(' ', file = sys.stderr) # this is a line that yields error print("Could not locate modifyrepo.py", file=sys.stderr) print("That is