# GRADED FUNCTION: initialize_parameters_deep

Course Q&A Deep Learning Specialization Neural Networks and Deep Learning
1

Hello,

I’m getting this error for some reason.

KeyError: ‘W1’

In the previous cell I defined

(Moderator edit: code removed)

2

Did you intentionally use upper case L on lefthand side and lower case l on righthand side?

1 Like
3

Hi, @Jefferson_Fernandez. The KeyError “exception” means that WL is not an item in the parameters dictionary. @ai_curious has shown you the way.