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- What does colon equal (:=) in Python mean? - Stack Overflow
In Python this is simply = To translate this pseudocode into Python you would need to know the data structures being referenced, and a bit more of the algorithm implementation Some notes about psuedocode: := is the assignment operator or = in Python = is the equality operator or == in Python There are certain styles, and your mileage may vary:
- Is there a not equal operator in Python? - Stack Overflow
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 types There's also the else clause:
- What is :: (double colon) in Python when subscripting sequences?
I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence[::3]?
- The tilde operator in Python - Stack Overflow
In Python, conceptually, numbers use an arbitrary number of bits The implementation will allocate more space automatically, according to what is necessary to represent the number (For example, if the value would "fit" in one machine word, then only one is used; the data type abstracts the process of sign-extending the number out to infinity )
- python - What does the caret (^) operator do? - Stack Overflow
Side note, seeing as Python defines this as an xor operation and the method name has "xor" in it, I would consider it a poor design choice to make that method do something not related to xor like exponentiation I think it's a good illustrative example of how it simply calls the __xor__ method, but to do that for real would be bad practice
- What is Pythons equivalent of (logical-and) in an if-statement?
There is no bitwise negation in Python (just the bitwise inverse operator ~ - but that is not equivalent to not) See also 6 6 Unary arithmetic and bitwise binary operations and 6 7 Binary arithmetic operations The logical operators (like in many other languages) have the advantage that these are short-circuited That means if the first operand already defines the result, then the second
- syntax - What do gt; gt; and lt; lt; mean in Python? - Stack Overflow
I notice that I can do things like 2 << 5 to get 64 and 1000 >> 2 to get 250 Also I can use >> in print: print >>obj, "Hello world" What is happening here?
- operators - Python != operation vs is not - Stack Overflow
In a comment on this question, I saw a statement that recommended using result is not None vs result != None What is the difference? And why might one be recommended over the other?
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