This prints the text from 1% to 100%, all on the same line since it uses stdout.write rather than print. However, before printing each percentage it first prints \u001b[1000D, which means "move cursor left by 1000 characters). This should move it all the way to the left of the screen, thus letting the new percentage that gets printed over-write the old one. Hence we see the loading percentage seamlessly changing from 1% to 100% before the function returns:
В российском городе в квартире пенсионерки рухнул потолокВ Батайске в квартире пенсионерки из-за протечки крыши рухнул потолок
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The frontend and backend servers are probably administered。关于这个话题，新收录的资料提供了深入分析
provide suggestions for optimizing individual pages