How to write four million lines of Python: Lessons from Dropbox on using the programming language at scale Your email has been sent While Python is a hugely popular programming language it has ...

But this overwrites the original, there are only two data, how to achieve new data on the basis of the original. I have another question, if I want to update the data according to the conditions, how ...

In Python, you always write x.f(). In C++, auto x = y may or may not create a copy (which may or may not be deep/shallow) of an object, depending on if it's a pointer or value. In Python, x = y never ...