But it's not a Python thing. Rust is noted below, and there's also C++.

  std::container<T> container;

  for (std::container<T>::iterator i = container.begin(); i != container.end(); ++i) { ...} 

  auto iter = container.begin(); while (iter != container.end()) { ...; ++iter; }

  for (auto const & t : container) { ... }