Filtering out ANSI escape sequences

I have a python script that's trying to interpret a trace of data written to and read from stdout and stdin, respectively. The problem is that this data is riddled with ANSI escapes I don't care about. These escapes are JSON encoded, so they look like "\033[A" and "\033]0;". I don't actually need to interpret the codes, but I do need to know how many characters are included in each (you'll notice the first sequence is 6 characters while the second is 7). Is there a straightforward way to filter out these codes from the strings I have?