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Reset the interactive namespace __warningregistry__ before executing code...
Reset the interactive namespace __warningregistry__ before executing code Fixes #6611. Idea: Right now, people often don't see important warnings when running code in IPython, because (to a first approximation) any given warning will only issue once per session. Blink and you'll miss it! This is a very common contributor to confused emails to numpy-discussion. E.g.: In [5]: 1 / my_array_with_random_contents /home/njs/.user-python2.7-64bit-3/bin/ipython:1: RuntimeWarning: divide by zero encountered in divide #!/home/njs/.user-python2.7-64bit-3/bin/python Out[5]: array([ 1.77073316, -2.29765021, -2.01800811, ..., 1.13871243, -1.08302964, -8.6185091 ]) Oo, right, guess I gotta be careful of those zeros -- thanks, numpy, for giving me that warning! A few days later: In [592]: 1 / some_other_array Out[592]: array([ 3.07735763, 0.50769289, 0.83984078, ..., -0.67563917, -0.85736257, -1.36511271]) Oops, it turns out that this array had a zero in it too, and that's going to bite me later. But no warning this time! The effect of this commit is to make it so that warnings triggered by the code in cell 5 do *not* suppress warnings triggered by the code in cell 592. Note that this only applies to warnings triggered *directly* by code entered interactively -- if somepkg.foo() calls anotherpkg.bad_func() which issues a warning, then this warning will still only be displayed once, even if multiple cells call somepkg.foo(). But if cell 5 and cell 592 both call anotherpkg.bad_func() directly, then both will get warnings. (Important exception: if foo() is defined *interactively*, and calls anotherpkg.bad_func(), then every cell that calls foo() will display the warning again. This is unavoidable without fixes to CPython upstream.) Explanation: Python's warning system has some weird quirks. By default, it tries to suppress duplicate warnings, where "duplicate" means the same warning message triggered twice by the same line of code. This requires determining which line of code is responsible for triggering a warning, and this is controlled by the stacklevel= argument to warnings.warn. Basically, though, the idea is that if foo() calls bar() which calls baz() which calls some_deprecated_api(), then baz() will get counted as being "responsible", and the warning system will make a note that the usage of some_deprecated_api() inside baz() has already been warned about and doesn't need to be warned about again. So far so good. To accomplish this, obviously, there has to be a record of somewhere which line this was. You might think that this would be done by recording the filename:linenumber pair in a dict inside the warnings module, or something like that. You would be wrong. What actually happens is that the warnings module will use stack introspection to reach into baz()'s execution environment, create a global (module-level) variable there named __warningregistry__, and then, inside this dictionary, record just the line number. Basically, it assumes that any given module contains only one line 1, only one line 2, etc., so storing the filename is irrelevant. Obviously for interactive code this is totally wrong -- all cells share the same execution environment and global namespace, and they all contain a new line 1. Currently the warnings module treats these as if they were all the same line. In fact they are not the same line; once we have executed a given chunk of code, we will never see those particular lines again. As soon as a given chunk of code finishes executing, its line number labels become meaningless, and the corresponding warning registry entries become meaningless as well. Therefore, with this patch we delete the __warningregistry__ each time we execute a new block of code.

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setup.py
355 lines | 12.5 KiB | text/x-python | PythonLexer
#!/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) 2008-2011, IPython Development Team.
# Copyright (c) 2001-2007, Fernando Perez <fernando.perez@colorado.edu>
# Copyright (c) 2001, Janko Hauser <jhauser@zscout.de>
# Copyright (c) 2001, Nathaniel Gray <n8gray@caltech.edu>
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file COPYING.rst, distributed with this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Minimal Python version sanity check
#-----------------------------------------------------------------------------
from __future__ import print_function
import sys
# This check is also made in IPython/__init__, don't forget to update both when
# changing Python version requirements.
v = sys.version_info
if v[:2] < (2,7) or (v[0] >= 3 and v[:2] < (3,3)):
error = "ERROR: IPython requires Python version 2.7 or 3.3 or above."
print(error, file=sys.stderr)
sys.exit(1)
PY3 = (sys.version_info[0] >= 3)
# 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 setupbase import target_update
from setupbase import (
setup_args,
find_packages,
find_package_data,
check_package_data_first,
find_entry_points,
build_scripts_entrypt,
find_data_files,
check_for_dependencies,
git_prebuild,
check_submodule_status,
update_submodules,
require_submodules,
UpdateSubmodules,
get_bdist_wheel,
CompileCSS,
JavascriptVersion,
css_js_prerelease,
install_symlinked,
install_lib_symlink,
install_scripts_for_symlink,
unsymlink,
)
from setupext import setupext
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 and "egg_info" 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 in ('nt','dos'):
os_name = 'windows'
else:
os_name = os.name
# 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)
#-------------------------------------------------------------------------------
# Make sure we aren't trying to run without submodules
#-------------------------------------------------------------------------------
here = os.path.abspath(os.path.dirname(__file__))
def require_clean_submodules():
"""Check on git submodules before distutils can do anything
Since distutils cannot be trusted to update the tree
after everything has been set in motion,
this is not a distutils command.
"""
# PACKAGERS: Add a return here to skip checks for git submodules
# don't do anything if nothing is actually supposed to happen
for do_nothing in ('-h', '--help', '--help-commands', 'clean', 'submodule'):
if do_nothing in sys.argv:
return
status = check_submodule_status(here)
if status == "missing":
print("checking out submodules for the first time")
update_submodules(here)
elif status == "unclean":
print('\n'.join([
"Cannot build / install IPython with unclean submodules",
"Please update submodules with",
" python setup.py submodule",
"or",
" git submodule update",
"or commit any submodule changes you have made."
]))
sys.exit(1)
require_clean_submodules()
#-------------------------------------------------------------------------------
# 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'):
# 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'),
]
[ 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()
setup_args['packages'] = packages
setup_args['package_data'] = package_data
setup_args['data_files'] = data_files
#---------------------------------------------------------------------------
# custom distutils commands
#---------------------------------------------------------------------------
# imports here, so they are after setuptools import if there was one
from distutils.command.sdist import sdist
from distutils.command.upload import upload
class UploadWindowsInstallers(upload):
description = "Upload Windows installers to PyPI (only used from tools/release_windows.py)"
user_options = upload.user_options + [
('files=', 'f', 'exe file (or glob) to upload')
]
def initialize_options(self):
upload.initialize_options(self)
meta = self.distribution.metadata
base = '{name}-{version}'.format(
name=meta.get_name(),
version=meta.get_version()
)
self.files = os.path.join('dist', '%s.*.exe' % base)
def run(self):
for dist_file in glob(self.files):
self.upload_file('bdist_wininst', 'any', dist_file)
setup_args['cmdclass'] = {
'build_py': css_js_prerelease(
check_package_data_first(git_prebuild('IPython')),
strict=False),
'sdist' : css_js_prerelease(git_prebuild('IPython', sdist)),
'upload_wininst' : UploadWindowsInstallers,
'submodule' : UpdateSubmodules,
'css' : CompileCSS,
'symlink': install_symlinked,
'install_lib_symlink': install_lib_symlink,
'install_scripts_sym': install_scripts_for_symlink,
'unsymlink': unsymlink,
'jsversion' : JavascriptVersion,
}
#---------------------------------------------------------------------------
# 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'
needs_setuptools = set(('develop', 'release', 'bdist_egg', 'bdist_rpm',
'bdist', 'bdist_dumb', 'bdist_wininst', 'bdist_wheel',
'egg_info', 'easy_install', 'upload', 'install_egg_info',
))
if sys.platform == 'win32':
# Depend on setuptools for install on *Windows only*
# If we get script-installation working without setuptools,
# then we can back off, but until then use it.
# See Issue #369 on GitHub for more
needs_setuptools.add('install')
if len(needs_setuptools.intersection(sys.argv)) > 0:
import setuptools
# This dict is used for passing extra arguments that are setuptools
# specific to setup
setuptools_extra_args = {}
# setuptools requirements
extras_require = dict(
parallel = ['pyzmq>=2.1.11'],
qtconsole = ['pyzmq>=2.1.11', 'pygments'],
zmq = ['pyzmq>=2.1.11'],
doc = ['Sphinx>=1.1', 'numpydoc'],
test = ['nose>=0.10.1'],
terminal = [],
nbformat = ['jsonschema>=2.0'],
notebook = ['tornado>=3.1', 'pyzmq>=2.1.11', 'jinja2', 'pygments', 'mistune>=0.3.1'],
nbconvert = ['pygments', 'jinja2', 'mistune>=0.3.1']
)
if sys.version_info < (3, 3):
extras_require['test'].append('mock')
extras_require['notebook'].extend(extras_require['nbformat'])
extras_require['nbconvert'].extend(extras_require['nbformat'])
everything = set()
for deps in extras_require.values():
everything.update(deps)
extras_require['all'] = everything
install_requires = []
# add readline
if sys.platform == 'darwin':
if any(arg.startswith('bdist') for arg in sys.argv) or not setupext.check_for_readline():
install_requires.append('gnureadline')
elif sys.platform.startswith('win'):
extras_require['terminal'].append('pyreadline>=2.0')
if 'setuptools' in sys.modules:
# setup.py develop should check for submodules
from setuptools.command.develop import develop
setup_args['cmdclass']['develop'] = require_submodules(develop)
setup_args['cmdclass']['bdist_wheel'] = css_js_prerelease(get_bdist_wheel())
setuptools_extra_args['zip_safe'] = False
setuptools_extra_args['entry_points'] = {'console_scripts':find_entry_points()}
setup_args['extras_require'] = extras_require
requires = setup_args['install_requires'] = install_requires
# 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['data_files'].append(
['Scripts', ('scripts/ipython.ico', 'scripts/ipython_nb.ico')])
setup_args['scripts'] = [pjoin('scripts','ipython_win_post_install.py')]
setup_args['options'] = {"bdist_wininst":
{"install_script":
"ipython_win_post_install.py"}}
else:
# If we are installing 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.
for install_cmd in ('install', 'symlink'):
if install_cmd in sys.argv:
check_for_dependencies()
break
# scripts has to be a non-empty list, or install_scripts isn't called
setup_args['scripts'] = [e.split('=')[0].strip() for e in find_entry_points()]
setup_args['cmdclass']['build_scripts'] = build_scripts_entrypt
#---------------------------------------------------------------------------
# Do the actual setup now
#---------------------------------------------------------------------------
setup_args.update(setuptools_extra_args)
def main():
setup(**setup_args)
cleanup()
if __name__ == '__main__':
main()