short answer: YES Ref: http://docs.scipy.org/doc/numpy/reference/generated/numpy.invert.html Notice: Computes the bit-wise NOT of the underlying binary representation of the integers in the input arrays. This ufunc implements the C/Python operator ~. and bitwise_not is an alias for invert: >> np.bitwise_not is np.invert >> True
The corresponding operator is |: df[(df < 3) | (df == 5)] would elementwise check if value is less than 3 or equal to 5. If you need a function to do this, we have np.logical_or. For two conditions, you can use df[np.logical_or(df<3, df==5)] Or, for multiple conditions use the logical_or.reduce, df[np.logical_or.reduce([df<3, df==5])] Since the … Read more
Suppose you are using the value of parameter, but if the value is say None, then you would rather like to have an empty string “” instead of None. What would you do in general? if parameter: # use parameter (well your expression using `” ” + parameter` in this case else: # use “” … Read more
Overview of boolean algebra We have two values: T and F. We can combine these values in three ways: NOT, AND, and OR. NOT NOT is the simplest: NOT T = F NOT F = T We can write this as a truth table: when given.. | results in… ============================ T | F F | … Read more
Here are a couple of guidelines: Boolean operators are usually used on boolean values but bitwise operators are usually used on integer values. Boolean operators are short-circuiting but bitwise operators are not short-circuiting. The short-circuiting behaviour is useful in expressions like this: if x is not None and x.foo == 42: # … This would … Read more
How can I convert a string to boolean in JavaScript?
The shorter ones are vectorized, meaning they can return a vector, like this: ((-2:2) >= 0) & ((-2:2) <= 0) # [1] FALSE FALSE TRUE FALSE FALSE The longer form evaluates left to right examining only the first element of each vector, so the above gives ((-2:2) >= 0) && ((-2:2) <= 0) # [1] … Read more