Python interleave two strings. 10: In a case pattern within a match statement, _ is a soft keyword that denotes a wildcard. In my opinion, to be even an intermediate Python programmer, it's one aspect of the language that it is necessary to be familiar with. 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: Jun 16, 2012 · There's the != (not equal) operator that returns True when two values differ, though be careful with the types because "1" != 1. invert. Jun 16, 2012 · There's the != (not equal) operator that returns True when two values differ, though be careful with the types because "1" != 1. To translate this pseudocode into Python you would need to know the data structures being referenced, and a bit more of the algorithm implementation. Aug 10, 2010 · In Python 3, your example range (N) [::step] produces a range object, not a list. source Otherwise, any special meaning of _ is purely by In Python this is simply =. There's also the else clause: Using 'or' in an 'if' statement (Python) [duplicate] Asked 8 years, 1 month ago Modified 5 months ago Viewed 167k times Nov 29, 2011 · In Python, for integers, the bits of the twos-complement representation of the integer are reversed (as in b <- b XOR 1 for each individual bit), and the result interpreted again as a twos-complement integer. So for integers, ~x is equivalent to (-x) - 1.