PyCharm has problems with IPython working inside PyPy created by virtualenv

[imperialguy]

Some version info:

OS: Mac OS X 10.8.4
Python: 2.7.2 (that came with the Mac OS X)
PyPy: 2.0.2
IPython: 0.13.2
PyCharm: 2.5.1

PyCharm's Python console fails when PyPy and IPython co-exist in a virtualenv created project.

I created three virtual environment projects. I did not activate any of the virtual environments. So, the system python still exists as it is.

Env - 1:

$ virtualenv -p /path/to/system/installed/python /path/to/sample_1/virtualenv/project
$ /path/to/sample_1/virtualenv/project/bin/pip install ipython

Now, when I run the python console in PyCharm it works fine. (Interpreter in PyCharm is set to /path/to/sample_1/virtualenv/project/bin/python)

Env - 2: Works Fine when I run the python console in PyCharm

$ virtualenv -p /path/to/pypy /path/to/sample_2/virtualenv/project

Now, when I run the python console in PyCharm it works fine. (Interpreter in PyCharm is set to /path/to/sample_2/virtualenv/project/bin/python)

Env - 3:

$ virtualenv -p /path/to/pypy /path/to/sample_3/virtualenv/project
$ /path/to/sample_3/virtualenv/project/bin/pip install ipython

Now, when I run the python console in PyCharm it fails with the following error. (Interpreter in PyCharm is set to /path/to/sample_3/virtualenv/project/bin/python)

/path/to/sample_3/virtualenv/project/bin/pypy -u /Applications/PyCharm.app/helpers/pydev/pydevconsole.py 60355 60356
PyDev console: using IPython 0.13.2
Traceback (most recent call last):
  File "app_main.py", line 72, in run_toplevel
  File "/Applications/PyCharm.app/helpers/pydev/pydevconsole.py", line 361, in <module>
    StartServer(pydev_localhost.get_localhost(), int(port), int(client_port))
  File "/Applications/PyCharm.app/helpers/pydev/pydevconsole.py", line 288, in StartServer
    interpreter = InterpreterInterface(host, client_port, threading.currentThread())
  File "/Applications/PyCharm.app/helpers/pydev/pydev_ipython_console.py", line 37, in __init__
    self.interpreter = PyDevFrontEnd()
  File "/Applications/PyCharm.app/helpers/pydev/pydev_ipython_console_011.py", line 35, in __init__
    shell = TerminalInteractiveShell.instance()
  File "/path/to/sample_3/virtualenv/project/site-packages/IPython/config/configurable.py", line 318, in instance
    inst = cls(*args, **kwargs)
  File "/path/to/sample_3/virtualenv/project/site-packages/IPython/frontend/terminal/interactiveshell.py", line 360, in __init__
    user_module=user_module, custom_exceptions=custom_exceptions
  File "/path/to/sample_3/virtualenv/project/site-packages/IPython/core/interactiveshell.py", line 454, in __init__
    self.init_readline()
  File "/path/to/sample_3/virtualenv/project/site-packages/IPython/core/interactiveshell.py", line 1843, in init_readline
    self.refill_readline_hist()
  File "/path/to/sample_3/virtualenv/project/site-packages/IPython/core/interactiveshell.py", line 1851, in refill_readline_hist
    self.readline.clear_history()
  File "/tmp/pypy-2.0.2/lib_pypy/pyrepl/readline.py", line 284, in clear_history
    del self.get_reader().history[:]
  File "/tmp/pypy-2.0.2/lib_pypy/pyrepl/readline.py", line 188, in get_reader
    console = UnixConsole(self.f_in, self.f_out, encoding=ENCODING)
  File "/tmp/pypy-2.0.2/lib_pypy/pyrepl/unix_console.py", line 98, in __init__
    curses.setupterm(term, self.output_fd)
error: setupterm: could not find terminfo database
    Process finished with exit code 1

Seems like this is related to this, but I am not sure.

Please help.

[minrk]

It looks like the pypy readline is broken in the PyCharm env - there isn't anything IPython-specific here other than the fact that IPython will import readline. Try importing readline in PyCharm with PyPy without IPython.

[imperialguy]

The following screenshot is from a virtualenv project which has only PyPy and not iPython. The import worked fine. This refers to Env - 2 in my actual post. There's no problems with PyCharm when only PyPy or only iPython (with original Python interpreter) exist in a virtual env project. The problem occurs when they co-exist.

[takluyver]

Try calling readline.clear_history() there after you've imported it - that's the point when it throws an error.

[imperialguy]

Yup, that's where the error is:

What can I do to fix this ?

[minrk]

I would bring it up with PyPy or PyCharm (not sure which). PyPy is making assumptions that PyCharm is not satisfying.

Depending on how PyCharm works, you can disable IPython's readline usage by specifying use_readline=False (I'm not sure if there are flags in PyCharm for doing this).

Closing here, as this is not an IPython Issue.

[imperialguy]

Thanks for the help. I will take it up with PyPy/PyCharm.