Python string formatting, using f prefix

Formatting is generally used in%, but later is recommended with format

Format has progressed, can be indexed or named, but still not very convenient and fast

# Logger.debug (' {} {} {} {} {}  {}  '. Format (method,  Resp.status_code, Resp.elapsed.total_ Seconds (), Resp.is_redirect, resp.text.__len__ (), Resp.url))
Logger.debug (f ' {method}  {Resp.status_code}  {round (Resp.elapsed.total_seconds (), 2): >3.2f}  { Resp.is_redirect}  {resp.text.__len__ (): <8d}  {Resp.url} ')

The above rewrite is the following, so the position information of the parameter is very clear immediately.

The premise is to use python3.6 and the above version

Python string formatting, using f prefix