I need to invert a string which contains only ‘0’s and ‘1’s(ex. input:”0110010″, output: “1001101”). Which is the best solution in terms of performance?
How to do this with either strings or binary literals.
Easy, use a bitwise operator. This is the proper way to do it, because it’s useful to understand how to use these operators in Python. If this is a task, this seems like the way whoever set the task wanted it to be done.
# Make binary literal (0b prefix) b = 0b11001001 # And use the complement operator print(~b) #Or if you want to print out the binary, try print(bin(~b))
Here are some examples:
>>> ~0b110011 -52 >>> bin(~0b110001) '-0b110010' >>> bin(~0b11000) '-0b11001'
If your binary number is a string:
s = "101" # bin(~int(s,2)) = "010"
Note, you might want to trim the first three characters off of the space if you want just the binary characters, e.g.