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This function does the equivalent of the real method (Python 3.6 and Python 2.7) just a lot slower. Also note that the implementation isn't exactly "pythonic" and only works for < comparisons. It's just to illustrate how it works. I haven't checked if it works like Pythons comparison for combined unicode characters. A more general variant would be:
The exact text of the HW (I completed the first two parts of this hw and thus this 3rd part is an expansion on the initial problem): """Expand on your Circle class by enabling the comparison of Circle objects using operators such as <, >, >=, <=, ==, and !=, where one Circle is considered "larger" than another if it is in fact larger (i.e., has ...
The operators <, >, ==, >=, <=, and != compare the values of two objects. is: check for identity - the semantics are that the object (as held in memory) is the object. Again, the documentation says: The operators is and is not test for object identity: x is y is true if and only if x and y are the same object.
32. There's the != (not equal) operator that returns True when two values differ, though be careful with the types because "1" != 1. This will always return True and "1" == 1 will always return False, since the types differ. Python is dynamically, but strongly typed, and other statically typed languages would complain about comparing different ...
This is documented in detail in the Expressions chapter of the documentation:. Comparisons can be chained arbitrarily, e.g., x < y <= z is equivalent to x < y and y <= z, except that y is evaluated only once (but in both cases z is not evaluated at all when x < y is found to be false).
This applies whether the lists are the same length or not--for example, list b is greater than list c because the 100 in c never comes into play. For example, when comparing a to b, the overall result will be the result of comparing 3 to 10. a < b -> True because 3 is less than 10. a > b -> False because 3 is not greater than 10. a == b ...
Additional Insight. Python's comparison algorithm is implemented within Object/object.c 's source code and invokes do_cmp(PyObject *v, PyObject *w) for two objects being compared. Each PyObject instance has a reference to its built-in PyTypeObject type through py_object->ob_type.
is compares two objects in memory, == compares their values. For example, you can see that small integers are cached by Python: c = 1. b = 1. >>> b is c. True. You should use == when comparing values and is when comparing identities. (Also, from an English point of view, "equals" is different from "is".)
The Python Doc for Comparisons says:. Comparisons can be chained arbitrarily, e.g., x < y <= z is equivalent to x < y and y <= z, except that y is evaluated only once (but in both cases z is not evaluated at all when x < y is found to be false).
When writing custom classes it is often important to allow equivalence by means of the == and != operators. In Python, this is made possible by implementing the __eq__ and __ne__ special methods, respectively. The easiest way I've found to do this is the following method: def __init__(self, item): self.item = item.