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ipython crashes with TypeError for ipython 3.1.0 with python3.5 and pyreadline #8316
Description
I'm running Windows 7 with whatever the current set of patches are, Python3.5 rc2, and just did a pip install of ipython 3.1.0.
Came without colors, and said that for color support I need to install pyreadline on Windows. So I did. An then it crashed with:
Traceback (most recent call last):
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\runpy.py", line 170, in _run_module_as_main
"__main__", mod_spec)
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\Scripts\ipython.exe\__main__.py", line 9, in <module>
sys.exit(start_ipython())
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\IPython\__init__.py", line 120, in start_ipython
return launch_new_instance(argv=argv, **kwargs)
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\IPython\config\application.py", line 573, in launch_instance
app.initialize(argv)
File "<string>", line 2, in initialize
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\IPython\config\application.py", line 75, in catch_config_error
return method(app, *args, **kwargs)
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\IPython\terminal\ipapp.py", line 332, in initialize
self.init_shell()
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\IPython\terminal\ipapp.py", line 348, in init_shell
ipython_dir=self.ipython_dir, user_ns=self.user_ns)
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\IPython\config\configurable.py", line 337, in instance
inst = cls(*args, **kwargs)
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\IPython\core\interactiveshell.py", line 512, in __init__
self.init_readline()
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\IPython\core\interactiveshell.py", line 1912, in init_readline
import IPython.utils.rlineimpl as readline
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\IPython\utils\rlineimpl.py", line 21, in <module>
_rl = __import__(_rlmod_name)
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\readline.py", line 6, in <module>
from pyreadline.rlmain import Readline
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\pyreadline\__init__.py", line 11, in <module>
from . import unicode_helper, logger, clipboard, lineeditor, modes, console
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\pyreadline\console\__init__.py", line 15, in <module>
from .console import *
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\site-packages\pyreadline\console\console.py", line 610, in <module>
msvcrt = cdll.LoadLibrary(ctypes.util.find_msvcrt())
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\ctypes\__init__.py", line 425, in LoadLibrary
return self._dlltype(name)
File "C:\Users\wwerner\AppData\Local\Programs\Python\Python35\lib\ctypes\__init__.py", line 347, in __init__
self._handle = _dlopen(self._name, mode)
TypeError: bad argument type for built-in operation```
Doing `py -m pip uninstall pyreadline` makes it work, once again.
Activity
takluyver commentedon Apr 14, 2015
@jstenar can you take a look? This looks like it could be an issue with pyreadline.
It may also be an upstream bug in Python - I think they're planning to move to VS2015 for 3.5, and that brings some changes to the Visual C runtime.
ctypes.util.find_msvcrt()could be broken. I'm at PyCon, I'll try to ping the Microsoft guys and see what the status of this is.takluyver commentedon Apr 14, 2015
I spoke to Steve Dower, and pyreadline will need to change. I have opened pyreadline/pyreadline#32.