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QUYEN NGUYEN
5,100 Pointsreversedstr.Reversedstr('hello) ??
Why can't we just call Reversestr('hello') since Reversedstr is already a class ?? what is the purpose of the lower case reverdstr(is that the module ?)
1 Answer
Alex Koumparos
Python Development Techdegree Student 36,887 PointsHi Quyen,
It all depends on how we import the class. In the video, Kenneth imports ReversedStr into the local namespace (around 1:50):
from reversedstr import ReversedStr
Because the ReversedStr class is now in the local namespace, it can be called directly:
rs = ReversedStr('hello')
In contrast, at around the 3:35 mark, Kenneth just imports the module:
import reversedstr
In this situation, all the module’s classes remain in that module’s namespace (which is generally better practice as it ensures we don’t have name collisions).
Because the ReversedStr class is in reversedstr’s namespace, we need to prefix ReversedStr with the module name every time we access it (obviously this can get tedious for methods we use a lot, which is why the ability to load the class into the local namespace exists):
rs = reversedstr.ReversedStr('hello')
Here’s a link to an article that explains this in more detail.
Hope that helps,
Alex