How to update/upgrade a package using pip?

The way is or in short Using sudo will ask to enter your root password to confirm the action, but although common, is considered unsafe. If you do not have a root password (if you are not the admin) you should probably work with virtualenv. You can also use the user flag to install it on this user only.

Python: Find in list

As for your first question: that code is perfectly fine and should work if item equals one of the elements inside myList. Maybe you try to find a string that does not exactly match one of the items or maybe you are using a float value which suffers from inaccuracy. As for your second question: … Read more

How to implement 2D vector array?

I’m not exactly sure what the problem is, as your example code has several errors and doesn’t really make it clear what you’re trying to do. But here’s how you add to a specific row of a 2D vector: Does this answer your question? If not, could you try to be more specific as to … Read more