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python Programming Glossary: immutablehttp://stackoverflow.com/questions/1151658/python-hashable-dicts this use of key value collections is that they should be immutable but I don't intend to expose the interface to allow them to.. interface to allow them to be changed so either mutable or immutable collections are fine The problem is that python dicts cannot.. does a bit extra work to make the resulting dicts vaguely immutable for practical purposes. Of course it's still quite easy to hack..
When is “i += x” different from “i = i + x” in Python? http://stackoverflow.com/questions/15376509/when-is-i-x-different-from-i-i-x-in-python __add__ should return a new instance of something. For immutable objects both methods return a new instance but __iadd__ will..
Why do attribute references act like this with Python inheritance? http://stackoverflow.com/questions/206734/why-do-attribute-references-act-like-this-with-python-inheritance values can be shared assuming they are supposed to be immutable class SomeClass object __instances__ def __new__ cls v1 v2 v3..
http://stackoverflow.com/questions/280243/python-linked-list being able to reference separate parts of them. Make them immutable and they are really easy to work with python linked list ..
What are “named tuples” in Python? http://stackoverflow.com/questions/2970608/what-are-named-tuples-in-python struct or other common record types except that they are immutable. They were added in Python 2.6 and Python 3.0 although there.. tuple packing. Furthermore you can also replace ordinary immutable classes that have no functions only fields with them. You can.. ... However as with tuples attributes in named tuples are immutable Point namedtuple 'Point' 'x y' pt1 Point 1.0 5.0 pt1.x 2.0 AttributeError..
String comparison in Python: is vs. == [duplicate] http://stackoverflow.com/questions/2988017/string-comparison-in-python-is-vs and is when comparing identities. When comparing ints or immutable types in general you pretty much always want the former. There's..
Remove specific characters from a string in python http://stackoverflow.com/questions/3939361/remove-specific-characters-from-a-string-in-python share improve this question Strings in python are immutable can't be changed . Because of this the effect of line.replace..
In Python, why can a function modify some arguments as perceived by the caller, but not others? http://stackoverflow.com/questions/575196/in-python-why-can-a-function-modify-some-arguments-as-perceived-by-the-caller in a caller scope . Objects can be mutable like lists or immutable like integers strings in Python . Mutable object you can change...
What's the difference between list and tuples in Python? http://stackoverflow.com/questions/626759/whats-the-difference-between-list-and-tuples-in-python share improve this question Apart from tuples being immutable there is also a semantic distinction that should guide their.. Python documentation also mentions this Tuples are immutable and usually contain an heterogeneous sequence ... . In a statically..
Python's use of __new__ and __init__? http://stackoverflow.com/questions/674304/pythons-use-of-new-and-init need to override __new__ unless you're subclassing an immutable type like str int unicode or tuple. From http mail.python.org..
Creating a singleton in python http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python That is a singleton where all of the reachable objects are immutable. If all objects are immutable than Singleton has no global state.. of the reachable objects are immutable. If all objects are immutable than Singleton has no global state as everything is constant...
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference will still point at the original object. If you pass an immutable object to a method you still can't rebind the outer reference.. was no way to change where outer_list pointed. String an immutable type It's immutable so there's nothing we can do to change the.. where outer_list pointed. String an immutable type It's immutable so there's nothing we can do to change the contents of the string..
Under which circumstances do equal strings share the same reference? http://stackoverflow.com/questions/11611750/under-which-circumstances-do-equal-strings-share-the-same-reference You could exclude immutable types from your tests by using Immutable basestring tuple numbers.Number frozenset # ... if not isinstance.. tuple numbers.Number frozenset # ... if not isinstance x Immutable # Exclude types known to be immutable Note that this would also..
http://stackoverflow.com/questions/2671376/hashable-immutable and immmutable Are there mutable objects that are hashable Immutable objects that are not hashable python data structures hash immutability..
Types for which “is” keyword may be equivalent to equality operator in Python http://stackoverflow.com/questions/3218308/types-for-which-is-keyword-may-be-equivalent-to-equality-operator-in-python all equal but physically they will be different objects. Immutable types like strings and tuples might be pooled by the Python..
How to make an immutable object in Python? http://stackoverflow.com/questions/4828080/how-to-make-an-immutable-object-in-python __init__ . Subclassing a tuple is a trick that works class Immutable tuple def __new__ cls a b return tuple.__new__ cls a b @property.. @property def b self return self 1 def __str__ self return Immutable 0 1 .format self.a self.b def __setattr__ self ignored return.. way to get the same behaviour as your original code is Immutable collections.namedtuple Immutable a b It does not solve the problem..
http://stackoverflow.com/questions/5541324/immutable-numpy-array numpy array Is there a simple way to create an immutable NumPy..
Immutable vs mutable types - Python http://stackoverflow.com/questions/8056130/immutable-vs-mutable-types-python vs mutable types Python I'm confused on what an immutable type..
How to integrate SQLAlchemy and a subclassed Numpy.ndarray smoothly and in a pythonic way? http://stackoverflow.com/questions/8940802/how-to-integrate-sqlalchemy-and-a-subclassed-numpy-ndarray-smoothly-and-in-a-pyt np.array dto.amount .view cls obj.setflags write False # Immutable obj._dto dto return obj @property def name self return self._dto.name.. np.array dto.amount .view cls obj.setflags write False # Immutable obj._dto dto return obj @property def name self return self._dto.name..
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