First, you can’t just transport straight C for loops into Python. There has to be some concession to Python syntax. The initial attempt was clever but not clever enough.

A practical guide to reading Python syntax errors and fixing them. - oxylabs/python-syntax-errors ...

A for loop is used for iterating over a sequence (that is either a list, a tuple, a dictionary, a set, or a string). The else function after for is a function that takes precedence over search loops - ...

If you’ve ever written any Python at all, the chances are you’ve used iterators without even realising it. Writing your own and using them in your programs can provide significant perfo… ...