Python collections.UserString() Examples

def to_String_for_subst(s,
                        isinstance=isinstance, str=str, to_String=to_String,
                        BaseStringTypes=BaseStringTypes, SequenceTypes=SequenceTypes,
                        UserString=UserString):

    # Note that the test cases are sorted by order of probability.
    if isinstance(s, BaseStringTypes):
        return s
    elif isinstance(s, SequenceTypes):
        return ' '.join([to_String_for_subst(e) for e in s])
    elif isinstance(s, UserString):
        # s.data can only be either a unicode or a regular
        # string. Please see the UserString initializer.
        return s.data
    else:
        return str(s) 

def substitute(self, args, lvars, within_list):
            """Substitute expansions in an argument or list of arguments.

            This serves as a wrapper for splitting up a string into
            separate tokens.
            """

            if is_String(args) and not isinstance(args, CmdStringHolder):
                args = str(args)        # In case it's a UserString.
                args = _separate_args.findall(args)
                for a in args:
                    if a[0] in ' \t\n\r\f\v':
                        if '\n' in a:
                            self.next_line()
                        elif within_list:
                            self.append(a)
                        else:
                            self.next_word()
                    else:
                        self.expand(a, lvars, within_list)
            else:
                self.expand(args, lvars, within_list) 

def to_String_for_subst(s, 
                        isinstance=isinstance, str=str, to_String=to_String,
                        BaseStringTypes=BaseStringTypes, SequenceTypes=SequenceTypes,
                        UserString=UserString):
                        
    # Note that the test cases are sorted by order of probability.
    if isinstance(s, BaseStringTypes):
        return s
    elif isinstance(s, SequenceTypes):
        l = []
        for e in s:
            l.append(to_String_for_subst(e))
        return ' '.join( s )
    elif isinstance(s, UserString):
        # s.data can only be either a unicode or a regular
        # string. Please see the UserString initializer.
        return s.data
    else:
        return str(s) 

def substitute(self, args, lvars, within_list):
            """Substitute expansions in an argument or list of arguments.

            This serves as a wrapper for splitting up a string into
            separate tokens.
            """

            if is_String(args) and not isinstance(args, CmdStringHolder):
                args = str(args)        # In case it's a UserString.
                args = _separate_args.findall(args)
                for a in args:
                    if a[0] in ' \t\n\r\f\v':
                        if '\n' in a:
                            self.next_line()
                        elif within_list:
                            self.append(a)
                        else:
                            self.next_word()
                    else:
                        self.expand(a, lvars, within_list)
            else:
                self.expand(args, lvars, within_list) 

def to_String_for_subst(s, 
                        isinstance=isinstance, str=str, to_String=to_String,
                        BaseStringTypes=BaseStringTypes, SequenceTypes=SequenceTypes,
                        UserString=UserString):
                        
    # Note that the test cases are sorted by order of probability.
    if isinstance(s, BaseStringTypes):
        return s
    elif isinstance(s, SequenceTypes):
        l = []
        for e in s:
            l.append(to_String_for_subst(e))
        return ' '.join( s )
    elif isinstance(s, UserString):
        # s.data can only be either a unicode or a regular
        # string. Please see the UserString initializer.
        return s.data
    else:
        return str(s) 

def __init__(self, cmd, literal=None):
        collections.UserString.__init__(self, cmd)
        self.literal = literal 

def to_String(s,
              isinstance=isinstance, str=str,
              UserString=UserString, BaseStringTypes=BaseStringTypes):
    if isinstance(s,BaseStringTypes):
        # Early out when already a string!
        return s
    elif isinstance(s, UserString):
        # s.data can only be either a unicode or a regular
        # string. Please see the UserString initializer.
        return s.data
    else:
        return str(s) 

def __init__(self, cmd, literal=None):
        collections.UserString.__init__(self, cmd)
        self.literal = literal 

def substitute(self, args, lvars):
            """Substitute expansions in an argument or list of arguments.

            This serves as a wrapper for splitting up a string into
            separate tokens.
            """
            if is_String(args) and not isinstance(args, CmdStringHolder):
                args = str(args)        # In case it's a UserString.
                try:
                    def sub_match(match):
                        return self.conv(self.expand(match.group(1), lvars))
                    result = _dollar_exps.sub(sub_match, args)
                except TypeError:
                    # If the internal conversion routine doesn't return
                    # strings (it could be overridden to return Nodes, for
                    # example), then the 1.5.2 re module will throw this
                    # exception.  Back off to a slower, general-purpose
                    # algorithm that works for all data types.
                    args = _separate_args.findall(args)
                    result = []
                    for a in args:
                        result.append(self.conv(self.expand(a, lvars)))
                    if len(result) == 1:
                        result = result[0]
                    else:
                        result = ''.join(map(str, result))
                return result
            else:
                return self.expand(args, lvars) 

def to_String(s, 
              isinstance=isinstance, str=str,
              UserString=UserString, BaseStringTypes=BaseStringTypes):
    if isinstance(s,BaseStringTypes):
        # Early out when already a string!
        return s
    elif isinstance(s, UserString):
        # s.data can only be either a unicode or a regular
        # string. Please see the UserString initializer.
        return s.data
    else:
        return str(s) 

def is_String(e):
        return isinstance(e, (str, UserString)) 

def is_String(e):
        return isinstance(e, (str, unicode, UserString)) 

def test_collections_userstuff(self):
        """
        UserDict, UserList, and UserString have been moved to the
        collections module.
        """
        from collections import UserDict
        from collections import UserList
        from collections import UserString
        self.assertTrue(True) 

def test_install_aliases(self):
        """
        Does the install_aliases() interface monkey-patch urllib etc. successfully?
        """
        from future.standard_library import remove_hooks, install_aliases
        remove_hooks()
        install_aliases()

        from collections import Counter, OrderedDict   # backported to Py2.6
        from collections import UserDict, UserList, UserString

        # Requires Python dbm support:
        # import dbm
        # import dbm.dumb
        # import dbm.gnu
        # import dbm.ndbm

        from itertools import filterfalse, zip_longest

        from subprocess import check_output    # backported to Py2.6
        from subprocess import getoutput, getstatusoutput

        from sys import intern

        # test_support may not be available (e.g. on Anaconda Py2.6):
        # import test.support

        import urllib.error
        import urllib.parse
        import urllib.request
        import urllib.response
        import urllib.robotparser

        self.assertTrue('urlopen' in dir(urllib.request)) 

def test_str_protocol(self):
        self._superset_test(UserString, str) 

def test_user_string(self):
        d = collections.UserString('')
        self.assertEqual(pprint.pformat(d, width=1), "''")
        d = collections.UserString('the quick brown fox jumped over a lazy dog')
        self.assertEqual(pprint.pformat(d, width=20),
"""\
('the quick brown '
 'fox jumped over '
 'a lazy dog')""")
        self.assertEqual(pprint.pformat({1: d}, width=20),
"""\
{1: 'the quick '
    'brown fox '
    'jumped over a '
    'lazy dog'}""") 

def setUp(self):
        # need to keep references to them
        self.items = [ustr(c) for c in ('a', 'b', 'c')]
        self.items2 = [ustr(c) for c in ('x', 'y', 'z')]
        self.ab_items = [ustr(c) for c in 'ab']
        self.abcde_items = [ustr(c) for c in 'abcde']
        self.def_items = [ustr(c) for c in 'def']
        self.ab_weakset = WeakSet(self.ab_items)
        self.abcde_weakset = WeakSet(self.abcde_items)
        self.def_weakset = WeakSet(self.def_items)
        self.letters = [ustr(c) for c in string.ascii_letters]
        self.s = WeakSet(self.items)
        self.d = dict.fromkeys(self.items)
        self.obj = ustr('F')
        self.fs = WeakSet([self.obj]) 

def test_contains(self):
        for c in self.letters:
            self.assertEqual(c in self.s, c in self.d)
        # 1 is not weakref'able, but that TypeError is caught by __contains__
        self.assertNotIn(1, self.s)
        self.assertIn(self.obj, self.fs)
        del self.obj
        self.assertNotIn(ustr('F'), self.fs) 

def test_add(self):
        x = ustr('Q')
        self.s.add(x)
        self.assertIn(x, self.s)
        dup = self.s.copy()
        self.s.add(x)
        self.assertEqual(self.s, dup)
        self.assertRaises(TypeError, self.s.add, [])
        self.fs.add(Foo())
        self.assertTrue(len(self.fs) == 1)
        self.fs.add(self.obj)
        self.assertTrue(len(self.fs) == 1) 

def test_discard(self):
        a, q = ustr('a'), ustr('Q')
        self.s.discard(a)
        self.assertNotIn(a, self.s)
        self.s.discard(q)
        self.assertRaises(TypeError, self.s.discard, []) 

def test_weak_destroy_while_iterating(self):
        # Issue #7105: iterators shouldn't crash when a key is implicitly removed
        # Create new items to be sure no-one else holds a reference
        items = [ustr(c) for c in ('a', 'b', 'c')]
        s = WeakSet(items)
        it = iter(s)
        next(it)             # Trigger internal iteration
        # Destroy an item
        del items[-1]
        gc.collect()    # just in case
        # We have removed either the first consumed items, or another one
        self.assertIn(len(list(it)), [len(items), len(items) - 1])
        del it
        # The removal has been committed
        self.assertEqual(len(s), len(items)) 

def test_weak_destroy_and_mutate_while_iterating(self):
        # Issue #7105: iterators shouldn't crash when a key is implicitly removed
        items = [ustr(c) for c in string.ascii_letters]
        s = WeakSet(items)
        @contextlib.contextmanager
        def testcontext():
            try:
                it = iter(s)
                # Start iterator
                yielded = ustr(str(next(it)))
                # Schedule an item for removal and recreate it
                u = ustr(str(items.pop()))
                if yielded == u:
                    # The iterator still has a reference to the removed item,
                    # advance it (issue #20006).
                    next(it)
                gc.collect()      # just in case
                yield u
            finally:
                it = None           # should commit all removals

        with testcontext() as u:
            self.assertNotIn(u, s)
        with testcontext() as u:
            self.assertRaises(KeyError, s.remove, u)
        self.assertNotIn(u, s)
        with testcontext() as u:
            s.add(u)
        self.assertIn(u, s)
        t = s.copy()
        with testcontext() as u:
            s.update(t)
        self.assertEqual(len(s), len(t))
        with testcontext() as u:
            s.clear()
        self.assertEqual(len(s), 0) 

def checkequal(self, result, object, methodname, *args, **kwargs):
        result = self.fixtype(result)
        object = self.fixtype(object)
        # we don't fix the arguments, because UserString can't cope with it
        realresult = getattr(object, methodname)(*args, **kwargs)
        self.assertEqual(
            result,
            realresult
        ) 

def checkraises(self, exc, obj, methodname, *args):
        obj = self.fixtype(obj)
        # we don't fix the arguments, because UserString can't cope with it
        with self.assertRaises(exc) as cm:
            getattr(obj, methodname)(*args)
        self.assertNotEqual(str(cm.exception), '') 

def setUp(self):
        # need to keep references to them
        self.items = [ustr(c) for c in ('a', 'b', 'c')]
        self.items2 = [ustr(c) for c in ('x', 'y', 'z')]
        self.ab_items = [ustr(c) for c in 'ab']
        self.abcde_items = [ustr(c) for c in 'abcde']
        self.def_items = [ustr(c) for c in 'def']
        self.ab_weakset = WeakSet(self.ab_items)
        self.abcde_weakset = WeakSet(self.abcde_items)
        self.def_weakset = WeakSet(self.def_items)
        self.letters = [ustr(c) for c in string.ascii_letters]
        self.s = WeakSet(self.items)
        self.d = dict.fromkeys(self.items)
        self.obj = ustr('F')
        self.fs = WeakSet([self.obj]) 

def test_contains(self):
        for c in self.letters:
            self.assertEqual(c in self.s, c in self.d)
        # 1 is not weakref'able, but that TypeError is caught by __contains__
        self.assertNotIn(1, self.s)
        self.assertIn(self.obj, self.fs)
        del self.obj
        gc.collect() # required for IronPython
        self.assertNotIn(ustr('F'), self.fs) 

def test_add(self):
        x = ustr('Q')
        self.s.add(x)
        self.assertIn(x, self.s)
        dup = self.s.copy()
        self.s.add(x)
        self.assertEqual(self.s, dup)
        self.assertRaises(TypeError, self.s.add, [])
        self.fs.add(Foo())
        gc.collect() # required for IronPython
        self.assertTrue(len(self.fs) == 1)
        self.fs.add(self.obj)
        self.assertTrue(len(self.fs) == 1) 

def test_remove(self):
        x = ustr('a')
        self.s.remove(x)
        self.assertNotIn(x, self.s)
        self.assertRaises(KeyError, self.s.remove, x)
        self.assertRaises(TypeError, self.s.remove, []) 

def test_discard(self):
        a, q = ustr('a'), ustr('Q')
        self.s.discard(a)
        self.assertNotIn(a, self.s)
        self.s.discard(q)
        self.assertRaises(TypeError, self.s.discard, []) 

def test_weak_destroy_and_mutate_while_iterating(self):
        # Issue #7105: iterators shouldn't crash when a key is implicitly removed
        items = [ustr(c) for c in string.ascii_letters]
        s = WeakSet(items)
        @contextlib.contextmanager
        def testcontext():
            try:
                it = iter(s)
                # Start iterator
                yielded = ustr(str(next(it)))
                # Schedule an item for removal and recreate it
                u = ustr(str(items.pop()))
                if yielded == u:
                    # The iterator still has a reference to the removed item,
                    # advance it (issue #20006).
                    next(it)
                gc.collect()      # just in case
                yield u
            finally:
                it = None           # should commit all removals

        with testcontext() as u:
            self.assertNotIn(u, s)
        with testcontext() as u:
            self.assertRaises(KeyError, s.remove, u)
        self.assertNotIn(u, s)
        with testcontext() as u:
            s.add(u)
        self.assertIn(u, s)
        t = s.copy()
        with testcontext() as u:
            s.update(t)
        self.assertEqual(len(s), len(t))
        with testcontext() as u:
            s.clear()
        self.assertEqual(len(s), 0)