How to use initialize_globals method in autotest

Best Python code snippet using autotest_python

user_globals.py

Source:user_globals.py

...12This is how a typical user interface initializes the globals::13    sage: ui_globals = globals()  # or wherever the user interface stores its globals14    sage: from sage import all_cmdline  # or all_notebook15    sage: from sage.repl.user_globals import initialize_globals16    sage: _ = initialize_globals(all_cmdline, ui_globals)17Now everything which was imported in ``all_cmdline`` is available as a18global::19    sage: from sage.repl.user_globals import get_global, set_global20    sage: get_global("Matrix")21    <sage.matrix.constructor.MatrixFactory object at ...>22This is exactly the same::23    sage: ui_globals["Matrix"]24    <sage.matrix.constructor.MatrixFactory object at ...>25We inject a global::26    sage: set_global("myvar", "Hello World!")27    sage: get_global("myvar")28    'Hello World!'29If we set up things correctly, this new variable is now actually30available as global::31    sage: myvar32    'Hello World!'33AUTHORS:34- Jeroen Demeyer (2015-03-30): initial version (:trac:`12446`)35"""36#*****************************************************************************37#       Copyright (C) 2015 Jeroen Demeyer <jdemeyer@cage.ugent.be>38#39# This program is free software: you can redistribute it and/or modify40# it under the terms of the GNU General Public License as published by41# the Free Software Foundation, either version 2 of the License, or42# (at your option) any later version.43#                  http://www.gnu.org/licenses/44#*****************************************************************************45user_globals = None46def _check():47    """48    Raise ``RuntimeError`` if ``user_globals`` has not been initialized.49    EXAMPLES::50        sage: import sage.repl.user_globals51        sage: sage.repl.user_globals._check()52        sage: sage.repl.user_globals.user_globals = None53        sage: sage.repl.user_globals._check()54        Traceback (most recent call last):55        ...56        RuntimeError: the user-space globals dictionary has not been initialized...57    """58    if user_globals is None:59        raise RuntimeError(60            "the user-space globals dictionary has not been initialized. "61            "Use initialize_globals() or set_globals() or use a different "62            "function which doesn't need these globals")63def get_globals():64    """65    Return the dictionary of all user globals.66    EXAMPLES::67        sage: from sage.repl.user_globals import get_globals, initialize_globals68        sage: initialize_globals(sage.all)69        sage: get_globals()["Matrix"]70        <sage.matrix.constructor.MatrixFactory object at ...>71    """72    _check()73    return user_globals74def set_globals(g):75    """76    Set the dictionary of all user globals to ``g``.77    INPUT:78    - ``g`` -- a dictionary. Typically, this will be some dictionary79      given by the user interface or just ``globals()``.80    EXAMPLES::81        sage: from sage.repl.user_globals import get_globals, set_globals82        sage: my_dict = dict()83        sage: set_globals(my_dict)84        sage: my_dict is get_globals()85        True86    """87    global user_globals88    user_globals = g89def initialize_globals(all, g=None):90    """91    Set the user globals dictionary to ``g`` and assign everything92    which was imported in module ``all`` as global.93    INPUT:94    - ``all`` -- a module whose globals will be injected95    - ``g`` -- a dictionary, see :func:`set_globals`. If this is96      ``None``, keep the current globals dictionary.97    EXAMPLES::98        sage: my_globs = {"foo": "bar"}99        sage: from sage.repl.user_globals import initialize_globals100        sage: initialize_globals(sage.all, my_globs)101        sage: my_globs["foo"]102        'bar'103        sage: my_globs["Matrix"]104        <sage.matrix.constructor.MatrixFactory object at ...>105    Remove ``Matrix`` from the globals and initialize again without106    changing the dictionary::107        sage: del my_globs["Matrix"]108        sage: initialize_globals(sage.all)109        sage: my_globs["Matrix"]110        <sage.matrix.constructor.MatrixFactory object at ...>111    """112    if g is not None:113        set_globals(g)114    for key in dir(all):115        if key[0] != '_':116            user_globals[key] = getattr(all, key)117def get_global(name):118    """119    Return the value of global variable ``name``. Raise ``NameError``120    if there is no such global variable.121    INPUT:122    - ``name`` -- a string representing a variable name...

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