XOR is short for exclusive or. It is a logical, binary operator that requires that one of the two operands be true but not both. So these statements are true: And these statements are false: There really isn’t such a thing as an”exclusive and” (or XAND) since in theory it would have the same exact … Read more
Use !=. See comparison operators. For comparing object identities, you can use the keyword is and its negation is not. e.g.
Yes, it was added in version 2.5. The expression syntax is: First condition is evaluated, then exactly one of either a or b is evaluated and returned based on the Boolean value of condition. If condition evaluates to True, then a is evaluated and returned but b is ignored, or else when b is evaluated … Read more
The % (modulo) operator yields the remainder from the division of the first argument by the second. The numeric arguments are first converted to a common type. A zero right argument raises the ZeroDivisionError exception. The arguments may be floating point numbers, e.g., 3.14%0.7 equals 0.34 (since 3.14 equals 4*0.7 + 0.34.) The modulo operator … Read more
Basically, you check if an object is an instance of a specific class. You normally use it, when you have a reference or parameter to an object that is of a super class or interface type and need to know whether the actual object has some other type (normally more concrete). Example: Note that if … Read more
59 I need to know what += does in Python. It’s that simple. I also would appreciate links to definitions of other shorthand tools in Python.
Use !=. See comparison operators. For comparing object identities, you can use the keyword is and its negation is not. e.g.
++ is not an operator. It is two + operators. The + operator is the identity operator, which does nothing. (Clarification: the + and – unary operators only work on numbers, but I presume that you wouldn’t expect a hypothetical ++ operator to work on strings.) Parses as Which translates to You have to use the slightly longer += operator to do what you want to do: I suspect the ++ and — operators … Read more
I’m going to assume you want to build a the regex dynamically to contain other words than part1 and part2, and that you want order not to matter. If so you can use something like this: Positive matches: Negative matches:
The strict equality operator (===) behaves identically to the abstract equality operator (==) except no type conversion is done, and the types must be the same to be considered equal. Reference: Javascript Tutorial: Comparison Operators The == operator will compare for equality after doing any necessary type conversions. The === operator will not do the conversion, so if two values are not the … Read more