define methods in another file

[snippsat]

So basically "import" for Python is like "#include" for C/C++?

The general idea is similar similar,that want to use code written somewhere else in your program.
The underlying mechanism has several differences as C++ is a compiled language and Python is a interpreted language.

Example with #include <iostream> imports the methods related to input and output.
Python has these already build in,like eg print, write ect...
Python:

def foo():
	print("Hello world!")

C++:

#include <iostream>
using namespace std;

void foo(){
	cout << "hello world!" << endl;
}