make readline a dependency on OSX and pyreadline on Windows

closes gh-343

setup.py

@@ -1,252 +1,257 b''
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 """Setup script for IPython.
 
 Under Posix environments it works like a typical setup.py script. 
 Under Windows, the command sdist is not supported, since IPython 
 requires utilities which are not available under Windows."""
 
 #-----------------------------------------------------------------------------
 #  Copyright (c) 2008-2010, IPython Development Team.
 #  Copyright (c) 2001-2007, Fernando Perez <[e-mail]>
 #  Copyright (c) 2001, Janko Hauser <[e-mail]>
 #  Copyright (c) 2001, Nathaniel Gray <[e-mail]>
 #
 #  Distributed under the terms of the Modified BSD License.
 #
 #  The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Minimal Python version sanity check
 #-----------------------------------------------------------------------------
 
 import sys
 
 # This check is also made in IPython/__init__, don't forget to update both when
 # changing Python version requirements.
 if sys.version[0:3] < '2.6':
     error = """\
 ERROR: 'IPython requires Python Version 2.6 or above.'
 Exiting."""
     print >> sys.stderr, error
     sys.exit(1)
 
 # At least we're on the python version we need, move on.
 
 #-------------------------------------------------------------------------------
 # Imports
 #-------------------------------------------------------------------------------
 
 # Stdlib imports
 import os
 import shutil
 
 from glob import glob
 
 # BEFORE importing distutils, remove MANIFEST. distutils doesn't properly
 # update it when the contents of directories change.
 if os.path.exists('MANIFEST'): os.remove('MANIFEST')
 
 from distutils.core import setup
 
 # Our own imports
 from IPython.utils.path import target_update
 
 from setupbase import (
     setup_args, 
     find_packages, 
     find_package_data, 
     find_scripts,
     find_data_files,
     check_for_dependencies,
     record_commit_info,
 )
 
 isfile = os.path.isfile
 pjoin = os.path.join
 
 #-----------------------------------------------------------------------------
 # Function definitions
 #-----------------------------------------------------------------------------
 
 def cleanup():
     """Clean up the junk left around by the build process"""
     if "develop" not in sys.argv:
         try:
             shutil.rmtree('ipython.egg-info')
         except:
             try:
                 os.unlink('ipython.egg-info')
             except:
                 pass
 
 #-------------------------------------------------------------------------------
 # Handle OS specific things
 #-------------------------------------------------------------------------------
 
 if os.name == 'posix':
     os_name = 'posix'
 elif os.name in ['nt','dos']:
     os_name = 'windows'
 else:
     print 'Unsupported operating system:',os.name
     sys.exit(1)
 
 # Under Windows, 'sdist' has not been supported.  Now that the docs build with
 # Sphinx it might work, but let's not turn it on until someone confirms that it
 # actually works.
 if os_name == 'windows' and 'sdist' in sys.argv:
     print 'The sdist command is not available under Windows.  Exiting.'
     sys.exit(1)
 
 #-------------------------------------------------------------------------------
 # Things related to the IPython documentation
 #-------------------------------------------------------------------------------
 
 # update the manuals when building a source dist
 if len(sys.argv) >= 2 and sys.argv[1] in ('sdist','bdist_rpm'):
     import textwrap
 
     # List of things to be updated. Each entry is a triplet of args for
     # target_update()
     to_update = [
                   # FIXME - Disabled for now: we need to redo an automatic way
                   # of generating the magic info inside the rst.                
                   #('docs/magic.tex',
                   #['IPython/Magic.py'],
                   #"cd doc && ./update_magic.sh" ),
 
                  ('docs/man/ipcluster.1.gz',
                   ['docs/man/ipcluster.1'],
                   'cd docs/man && gzip -9c ipcluster.1 > ipcluster.1.gz'),
 
                  ('docs/man/ipcontroller.1.gz',
                   ['docs/man/ipcontroller.1'],
                   'cd docs/man && gzip -9c ipcontroller.1 > ipcontroller.1.gz'),
 
                  ('docs/man/ipengine.1.gz',
                   ['docs/man/ipengine.1'],
                   'cd docs/man && gzip -9c ipengine.1 > ipengine.1.gz'),
 
                  ('docs/man/ipython.1.gz',
                   ['docs/man/ipython.1'],
                   'cd docs/man && gzip -9c ipython.1 > ipython.1.gz'),
 
                  ('docs/man/ipython-wx.1.gz',
                   ['docs/man/ipython-wx.1'],
                   'cd docs/man && gzip -9c ipython-wx.1 > ipython-wx.1.gz'),
 
                  ('docs/man/ipythonx.1.gz',
                   ['docs/man/ipythonx.1'],
                   'cd docs/man && gzip -9c ipythonx.1 > ipythonx.1.gz'),
 
                  ('docs/man/irunner.1.gz',
                   ['docs/man/irunner.1'],
                   'cd docs/man && gzip -9c irunner.1 > irunner.1.gz'),
 
                  ('docs/man/pycolor.1.gz',
                   ['docs/man/pycolor.1'],
                   'cd docs/man && gzip -9c pycolor.1 > pycolor.1.gz'),
                  ]
 
     # Only build the docs if sphinx is present
     try:
         import sphinx
     except ImportError:
         pass
     else:
         # The Makefile calls the do_sphinx scripts to build html and pdf, so
         # just one target is enough to cover all manual generation
 
         # First, compute all the dependencies that can force us to rebuild the
         # docs.  Start with the main release file that contains metadata
         docdeps = ['IPython/core/release.py']
         # Inculde all the reST sources
         pjoin = os.path.join
         for dirpath,dirnames,filenames in os.walk('docs/source'):
             if dirpath in ['_static','_templates']:
                 continue
             docdeps += [ pjoin(dirpath,f) for f in filenames
                          if f.endswith('.txt') ]
         # and the examples
         for dirpath,dirnames,filenames in os.walk('docs/example'):
             docdeps += [ pjoin(dirpath,f) for f in filenames
                          if not f.endswith('~') ]
         # then, make them all dependencies for the main PDF (the html will get
         # auto-generated as well).
         to_update.append(
             ('docs/dist/ipython.pdf',
              docdeps,
              "cd docs && make dist")
             )
         
     [ target_update(*t) for t in to_update ]
     
 #---------------------------------------------------------------------------
 # Find all the packages, package data, and data_files
 #---------------------------------------------------------------------------
 
 packages = find_packages()
 package_data = find_package_data()
 data_files = find_data_files()
 
 #---------------------------------------------------------------------------
 # Handle scripts, dependencies, and setuptools specific things
 #---------------------------------------------------------------------------
 
 # For some commands, use setuptools.  Note that we do NOT list install here!
 # If you want a setuptools-enhanced install, just run 'setupegg.py install'
 if len(set(('develop', 'sdist', 'release', 'bdist_egg', 'bdist_rpm',
            'bdist', 'bdist_dumb', 'bdist_wininst', 'install_egg_info',
            'build_sphinx', 'egg_info', 'easy_install', 'upload',
             )).intersection(sys.argv)) > 0:
     import setuptools
 
 # This dict is used for passing extra arguments that are setuptools 
 # specific to setup
 setuptools_extra_args = {}
 
 if 'setuptools' in sys.modules:
     setuptools_extra_args['zip_safe'] = False
     setuptools_extra_args['entry_points'] = {
         'console_scripts': find_scripts(True)
     }
     setup_args['extras_require'] = dict(
         parallel = 'pyzmq>=2.1.4',
         zmq = 'pyzmq>=2.0.10.1',
         doc='Sphinx>=0.3',
         test='nose>=0.10.1',
     )
+    requires = setup_args.setdefault('install_requires', [])
+    if sys.platform == 'darwin':
+        requires.append('readline')
+    elif sys.platform.startswith('win'):
+        requires.append('pyreadline')
     
     # Script to be run by the windows binary installer after the default setup
     # routine, to add shortcuts and similar windows-only things.  Windows
     # post-install scripts MUST reside in the scripts/ dir, otherwise distutils
     # doesn't find them.
     if 'bdist_wininst' in sys.argv:
         if len(sys.argv) > 2 and \
                ('sdist' in sys.argv or 'bdist_rpm' in sys.argv):
             print >> sys.stderr, "ERROR: bdist_wininst must be run alone. Exiting."
             sys.exit(1)
         setup_args['scripts'] = [pjoin('scripts','ipython_win_post_install.py')]
 else:
     # If we are running without setuptools, call this function which will
     # check for dependencies an inform the user what is needed.  This is
     # just to make life easy for users.
     check_for_dependencies()
     setup_args['scripts'] = find_scripts(False)
 
 #---------------------------------------------------------------------------
 # Do the actual setup now
 #---------------------------------------------------------------------------
 
 setup_args['cmdclass'] = {'build_py': record_commit_info('IPython')}
 setup_args['packages'] = packages
 setup_args['package_data'] = package_data
 setup_args['data_files'] = data_files
 setup_args.update(setuptools_extra_args)
 
 
 if __name__ == '__main__':
     setup(**setup_args)
     cleanup()

setupbase.py

@@ -1,387 +1,387 b''
 # encoding: utf-8
 """
 This module defines the things that are used in setup.py for building IPython
 
 This includes:
 
     * The basic arguments to setup
     * Functions for finding things like packages, package data, etc.
     * A function for checking dependencies.
 """
 from __future__ import print_function
 
 #-------------------------------------------------------------------------------
 #  Copyright (C) 2008  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-------------------------------------------------------------------------------
 
 #-------------------------------------------------------------------------------
 # Imports
 #-------------------------------------------------------------------------------
 import os
 import sys
 
 from ConfigParser import ConfigParser
 from distutils.command.build_py import build_py
 from glob import glob
 
 from setupext import install_data_ext
 
 #-------------------------------------------------------------------------------
 # Useful globals and utility functions
 #-------------------------------------------------------------------------------
 
 # A few handy globals
 isfile = os.path.isfile
 pjoin = os.path.join
 
 def oscmd(s):
     print(">", s)
     os.system(s)
 
 # A little utility we'll need below, since glob() does NOT allow you to do
 # exclusion on multiple endings!
 def file_doesnt_endwith(test,endings):
     """Return true if test is a file and its name does NOT end with any
     of the strings listed in endings."""
     if not isfile(test):
         return False
     for e in endings:
         if test.endswith(e):
             return False
     return True
 
 #---------------------------------------------------------------------------
 # Basic project information
 #---------------------------------------------------------------------------
 
 # release.py contains version, authors, license, url, keywords, etc.
 execfile(pjoin('IPython','core','release.py'))
 
 # Create a dict with the basic information
 # This dict is eventually passed to setup after additional keys are added.
 setup_args = dict(
       name             = name,
       version          = version,
       description      = description,
       long_description = long_description,
       author           = author,
       author_email     = author_email,
       url              = url,
       download_url     = download_url,
       license          = license,
       platforms        = platforms,
       keywords         = keywords,
       cmdclass         = {'install_data': install_data_ext},
       )
 
 
 #---------------------------------------------------------------------------
 # Find packages
 #---------------------------------------------------------------------------
 
 def add_package(packages,pname,config=False,tests=False,scripts=False,
                 others=None):
     """
     Add a package to the list of packages, including certain subpackages.
     """
     packages.append('.'.join(['IPython',pname]))
     if config:
         packages.append('.'.join(['IPython',pname,'config']))
     if tests:
         packages.append('.'.join(['IPython',pname,'tests']))
     if scripts:
         packages.append('.'.join(['IPython',pname,'scripts']))
     if others is not None:
         for o in others:
             packages.append('.'.join(['IPython',pname,o]))
 
 def find_packages():
     """
     Find all of IPython's packages.
     """
     packages = ['IPython']
     add_package(packages, 'config', tests=True, others=['default','profile'])
     add_package(packages, 'core', tests=True)
     add_package(packages, 'deathrow', tests=True)
     add_package(packages, 'extensions')
     add_package(packages, 'external')
     add_package(packages, 'external.argparse')
     add_package(packages, 'external.configobj')
     add_package(packages, 'external.decorator')
     add_package(packages, 'external.decorators')
     add_package(packages, 'external.guid')
     add_package(packages, 'external.Itpl')
     add_package(packages, 'external.mglob')
     add_package(packages, 'external.path')
     add_package(packages, 'external.pexpect')
     add_package(packages, 'external.pyparsing')
     add_package(packages, 'external.simplegeneric')
     add_package(packages, 'external.ssh')
     add_package(packages, 'external.validate')
     add_package(packages, 'kernel')
     add_package(packages, 'frontend')
     add_package(packages, 'frontend.qt')
     add_package(packages, 'frontend.qt.console', tests=True)
     add_package(packages, 'frontend.terminal', tests=True)    
     add_package(packages, 'lib', tests=True)
     add_package(packages, 'parallel', tests=True, scripts=True, 
                                     others=['apps','engine','client','controller'])
     add_package(packages, 'quarantine', tests=True)
     add_package(packages, 'scripts')
     add_package(packages, 'testing', tests=True)
     add_package(packages, 'testing.plugin', tests=False)
     add_package(packages, 'utils', tests=True)
     add_package(packages, 'zmq')
     add_package(packages, 'zmq.pylab')
     return packages
 
 #---------------------------------------------------------------------------
 # Find package data
 #---------------------------------------------------------------------------
 
 def find_package_data():
     """
     Find IPython's package_data.
     """
     # This is not enough for these things to appear in an sdist.
     # We need to muck with the MANIFEST to get this to work
     package_data = {
         'IPython.config.userconfig' : ['*'],
         'IPython.testing' : ['*.txt']
     }
     return package_data
 
 
 #---------------------------------------------------------------------------
 # Find data files
 #---------------------------------------------------------------------------
 
 def make_dir_struct(tag,base,out_base):
     """Make the directory structure of all files below a starting dir.
 
     This is just a convenience routine to help build a nested directory
     hierarchy because distutils is too stupid to do this by itself.
 
     XXX - this needs a proper docstring!
     """
     
     # we'll use these a lot below
     lbase = len(base)
     pathsep = os.path.sep
     lpathsep = len(pathsep)
     
     out = []
     for (dirpath,dirnames,filenames) in os.walk(base):
         # we need to strip out the dirpath from the base to map it to the
         # output (installation) path.  This requires possibly stripping the
         # path separator, because otherwise pjoin will not work correctly
         # (pjoin('foo/','/bar') returns '/bar').
         
         dp_eff = dirpath[lbase:]
         if dp_eff.startswith(pathsep):
             dp_eff = dp_eff[lpathsep:]
         # The output path must be anchored at the out_base marker    
         out_path = pjoin(out_base,dp_eff)
         # Now we can generate the final filenames. Since os.walk only produces
         # filenames, we must join back with the dirpath to get full valid file
         # paths:
         pfiles = [pjoin(dirpath,f) for f in filenames]
         # Finally, generate the entry we need, which is a pari of (output
         # path, files) for use as a data_files parameter in install_data.
         out.append((out_path, pfiles))
 
     return out
     
 
 def find_data_files():
     """
     Find IPython's data_files.
 
     Most of these are docs.
     """
     
     docdirbase  = pjoin('share', 'doc', 'ipython')
     manpagebase = pjoin('share', 'man', 'man1')
     
     # Simple file lists can be made by hand
     manpages  = filter(isfile, glob(pjoin('docs','man','*.1.gz')))
     igridhelpfiles = filter(isfile,
                             glob(pjoin('IPython','extensions','igrid_help.*')))
 
     # For nested structures, use the utility above
     example_files = make_dir_struct(
         'data',
         pjoin('docs','examples'),
         pjoin(docdirbase,'examples')
     )
     manual_files = make_dir_struct(
         'data',
         pjoin('docs','dist'),
         pjoin(docdirbase,'manual')
     )
 
     # And assemble the entire output list
     data_files = [ (manpagebase, manpages),
                    (pjoin(docdirbase, 'extensions'), igridhelpfiles),
                    ] + manual_files + example_files
 
     return data_files
 
 
 def make_man_update_target(manpage):
     """Return a target_update-compliant tuple for the given manpage.
 
     Parameters
     ----------
     manpage : string
       Name of the manpage, must include the section number (trailing number).
 
     Example
     -------
 
     >>> make_man_update_target('ipython.1') #doctest: +NORMALIZE_WHITESPACE
     ('docs/man/ipython.1.gz',
      ['docs/man/ipython.1'],
      'cd docs/man && gzip -9c ipython.1 > ipython.1.gz')
     """
     man_dir = pjoin('docs', 'man')
     manpage_gz = manpage + '.gz'
     manpath = pjoin(man_dir, manpage)
     manpath_gz = pjoin(man_dir, manpage_gz)
     gz_cmd = ( "cd %(man_dir)s && gzip -9c %(manpage)s > %(manpage_gz)s" %
                locals() )
     return (manpath_gz, [manpath], gz_cmd)
     
 #---------------------------------------------------------------------------
 # Find scripts
 #---------------------------------------------------------------------------
 
 def find_scripts(entry_points=False):
     """Find IPython's scripts.
     
     if entry_points is True:
         return setuptools entry_point-style definitions
     else:
         return file paths of plain scripts [default]
     
     """
     if entry_points:
         scripts = [
             'ipython = IPython.frontend.terminal.ipapp:launch_new_instance',
             'ipython-qtconsole = IPython.frontend.qt.console.ipythonqt:main',
             'pycolor = IPython.utils.PyColorize:main',
             'ipcontroller = IPython.parallel.apps.ipcontrollerapp:launch_new_instance',
             'ipengine = IPython.parallel.apps.ipengineapp:launch_new_instance',
             'iplogger = IPython.parallel.apps.iploggerapp:launch_new_instance',
             'ipcluster = IPython.parallel.apps.ipclusterapp:launch_new_instance',
             'iptest = IPython.testing.iptest:main',
             'irunner = IPython.lib.irunner:main'
         ]
     else:
         parallel_scripts = pjoin('IPython','parallel','scripts')
         main_scripts = pjoin('IPython','scripts')
         scripts = [
                    pjoin(parallel_scripts, 'ipengine'),
                    pjoin(parallel_scripts, 'ipcontroller'),
                    pjoin(parallel_scripts, 'ipcluster'),
                    pjoin(parallel_scripts, 'iplogger'),
                    pjoin(main_scripts, 'ipython'),
                    pjoin(main_scripts, 'ipython-qtconsole'),
                    pjoin(main_scripts, 'pycolor'),
                    pjoin(main_scripts, 'irunner'),
                    pjoin(main_scripts, 'iptest')
                   ]
     
     return scripts
 
 #---------------------------------------------------------------------------
 # Verify all dependencies
 #---------------------------------------------------------------------------
 
 def check_for_dependencies():
     """Check for IPython's dependencies.
     
     This function should NOT be called if running under setuptools!
     """
     from setupext.setupext import (
         print_line, print_raw, print_status,
         check_for_sphinx, check_for_pygments,
         check_for_nose, check_for_pexpect,
-        check_for_pyzmq
+        check_for_pyzmq, check_for_readline
     )
     print_line()
     print_raw("BUILDING IPYTHON")
     print_status('python', sys.version)
     print_status('platform', sys.platform)
     if sys.platform == 'win32':
         print_status('Windows version', sys.getwindowsversion())
     
     print_raw("")
     print_raw("OPTIONAL DEPENDENCIES")
 
     check_for_sphinx()
     check_for_pygments()
     check_for_nose()
     check_for_pexpect()
     check_for_pyzmq()
-
+    check_for_readline()
 
 def record_commit_info(pkg_dir, build_cmd=build_py):
     """ Return extended build command class for recording commit
 
     The extended command tries to run git to find the current commit, getting
     the empty string if it fails.  It then writes the commit hash into a file
     in the `pkg_dir` path, named ``.git_commit_info.ini``.
 
     In due course this information can be used by the package after it is
     installed, to tell you what commit it was installed from if known.
 
     To make use of this system, you need a package with a .git_commit_info.ini
     file - e.g. ``myproject/.git_commit_info.ini`` - that might well look like
     this::
 
         # This is an ini file that may contain information about the code state
         [commit hash]
         # The line below may contain a valid hash if it has been substituted
         # during 'git archive'
         archive_subst_hash=$Format:%h$
         # This line may be modified by the install process
         install_hash=
 
     The .git_commit_info file above is also designed to be used with git
     substitution - so you probably also want a ``.gitattributes`` file in the
     root directory of your working tree that contains something like this::
 
        myproject/.git_commit_info.ini export-subst
 
     That will cause the ``.git_commit_info.ini`` file to get filled in by ``git
     archive`` - useful in case someone makes such an archive - for example with
     via the github 'download source' button.
 
     Although all the above will work as is, you might consider having something
     like a ``get_info()`` function in your package to display the commit
     information at the terminal.  See the ``pkg_info.py`` module in the nipy
     package for an example.
     """
     class MyBuildPy(build_cmd):
         ''' Subclass to write commit data into installation tree '''
         def run(self):
             build_py.run(self)
             import subprocess
             proc = subprocess.Popen('git rev-parse --short HEAD',
                                     stdout=subprocess.PIPE,
                                     stderr=subprocess.PIPE,
                                     shell=True)
             repo_commit, _ = proc.communicate()
             # We write the installation commit even if it's empty
             cfg_parser = ConfigParser()
             cfg_parser.read(pjoin(pkg_dir, '.git_commit_info.ini'))
             cfg_parser.set('commit hash', 'install_hash', repo_commit)
             out_pth = pjoin(self.build_lib, pkg_dir, '.git_commit_info.ini')
             out_file = open(out_pth, 'wt')
             cfg_parser.write(out_file)
             out_file.close()
     return MyBuildPy

setupext/setupext.py

@@ -1,142 +1,157 b''
 # encoding: utf-8
 
 __docformat__ = "restructuredtext en"
 
 #-------------------------------------------------------------------------------
 #  Copyright (C) 2008  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-------------------------------------------------------------------------------
 
 #-------------------------------------------------------------------------------
 # Imports
 #-------------------------------------------------------------------------------
 
 import sys, os
 from textwrap import fill
 
 display_status=True
 
 if display_status:
     def print_line(char='='):
         print char * 76
 
     def print_status(package, status):
         initial_indent = "%22s: " % package
         indent = ' ' * 24
         print fill(str(status), width=76,
                    initial_indent=initial_indent,
                    subsequent_indent=indent)
 
     def print_message(message):
         indent = ' ' * 24 + "* "
         print fill(str(message), width=76,
                    initial_indent=indent,
                    subsequent_indent=indent)
 
     def print_raw(section):
         print section
 else:
     def print_line(*args, **kwargs):
         pass
     print_status = print_message = print_raw = print_line
 
 #-------------------------------------------------------------------------------
 # Tests for specific packages
 #-------------------------------------------------------------------------------
 
 def check_for_ipython():
     try:
         import IPython
     except ImportError:
         print_status("IPython", "Not found")
         return False
     else:
         print_status("IPython", IPython.__version__)
         return True
 
 def check_for_sphinx():
     try:
         import sphinx
     except ImportError:
         print_status('sphinx', "Not found (required for building documentation)")
         return False
     else:
         print_status('sphinx', sphinx.__version__) 
         return True
 
 def check_for_pygments():
     try:
         import pygments
     except ImportError:
         print_status('pygments', "Not found (required for syntax highlighting documentation)")
         return False
     else:
         print_status('pygments', pygments.__version__)
         return True
 
 def check_for_nose():
     try:
         import nose
     except ImportError:
         print_status('nose', "Not found (required for running the test suite)")
         return False
     else:
         print_status('nose', nose.__version__)
         return True
 
 def check_for_pexpect():
     try:
         import pexpect
     except ImportError:
         print_status("pexpect", "no (required for running standalone doctests)")
         return False
     else:
         print_status("pexpect", pexpect.__version__)
         return True
 
 def check_for_httplib2():
     try:
         import httplib2
     except ImportError:
         print_status("httplib2", "no (required for blocking http clients)")
         return False
     else:
         print_status("httplib2","yes")
         return True
 
 def check_for_sqlalchemy():
     try:
         import sqlalchemy
     except ImportError:
         print_status("sqlalchemy", "no (required for the ipython1 notebook)")
         return False
     else:
         print_status("sqlalchemy","yes")
         return True
 
 def check_for_simplejson():
     try:
         import simplejson
     except ImportError:
         print_status("simplejson", "no (required for the ipython1 notebook)")
         return False
     else:
         print_status("simplejson","yes")
         return True
 
 def check_for_pyzmq():
     try:
         import zmq
     except ImportError:
         print_status('pyzmq', "no (required for qtconsole and parallel computing capabilities)")
         return False
     else:
         if zmq.__version__ < '2.0.10':
             print_status('pyzmq', "no (require >= 2.0.10 for qtconsole and parallel computing capabilities)")
             
         else:
             print_status("pyzmq", zmq.__version__)
             return True
 
+def check_for_readline():
+    try:
+        import readline
+    except ImportError:
+        try:
+            import pyreadline
+        except ImportError:
+            print_status('readline', "no (required for good interactive behavior)")
+            return False
+        else:
+            print_status('readline', "yes pyreadline-"+pyreadline.release.version)
+            return True
+    else:
+        print_status('readline', "yes")
+        return True