I am working on a Python extension for the libisofs library. The extension is written in Cython , a Python-like language designed to write Python extensions. At a later point, this extension will be used to create the ISO Images in debimg. It will be disabled by default, but you can enable it via a configuration option.

If you want to get the first part of a string (in the following example a), you should use the partition method of the string, as it is the fastest way (and it also gives you the delimiter in [1] and the other part of the string in [2]): In [1]: a = ‘a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z’ In [2]: timeit a.partition(’/’)[0] 1000000 loops, best of 3: 362 ns per loop In [3]: timeit a[:a. ... Read more 》