Why indentation is use to denote block of code?

[Peng Yu]

Hi,

I want to understand why python use indentation to denote block of
code. What are the advantages of it? Is there a style in python to
denote a block of code the same as that of C++ (with '{}')?

One disadvantage of using indentation to denote a block of code is
that the runtime to automatically indent a python code would be about
a few times more than the runtime to automatically indent a C++ code
of the same length (both are in vim).

Regards,
Peng