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- 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
- 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:
- 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 –
- python - What is the purpose of the -m switch? - Stack Overflow
You must run python my_script py from the directory where the file is located Alternatively - python path to my_script py However, you can run python -m my_script (ie refer to the script by module name by omitting the py) from anywhere, as long as Python can find it! Python searches as follows (not 100% sure about the order): Current directory
- slice - How slicing in Python works - Stack Overflow
In Python 2 7 Slicing in Python [a:b:c] len = length of string, tuple or list c -- default is +1 The sign of c indicates forward or backward, absolute value of c indicates steps Default is forward with step size 1 Positive means forward, negative means backward a -- When c is positive or blank, default is 0 When c is negative, default is -1
- What is :: (double colon) in Python when subscripting sequences?
When slicing in Python the third parameter is the step As others mentioned, see Extended Slices for a nice overview With this knowledge, [::3] just means that you have not specified any start or end indices for your slice Since you have specified a step, 3, this will take every third entry of something starting at the first index For example:
- Behaviour of increment and decrement operators in Python
Python does not have unary increment decrement operators (-- ++) Instead, to increment a value, use a += 1 More detail and gotchas But be careful here If you're coming from C, even this is different in python Python doesn't have "variables" in the sense that C does, instead python uses names and objects, and in python ints are immutable
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