Simulation progress bar in Python

The Write method of the file is not to write the file directly to the hard disk, but to write the cache first, and then write to the disk when the cache is full and so on.

Sometimes to ensure data security, you need to call flush to force the data to drop. Similarly, there are flsuh methods in standard output sys.stdout, such as using sys.stdout to simulate a progress bar:

Import Sys,time  for  in range:    sys.stdout.write ("#")    Sys.stdout.flush ()    Time.sleep (0.5)

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Simulation progress bar in Python