Update serialization.py

[adinayyu]

Description

Checked the pep 8 and numpy style guide for utilities/serialization.py

Relevant Issue

#163 #relevant

Checklist

• [v ] I have followed the Contribution Guidelines and Code of Conduct
• [v ] I have commented my code following the NimbleEdge Styleguide
• [v ] I have labeled this PR with the relevant Type labels
• [v ] My changes are covered by tests

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[ramesht007]

please go through them and make the changes. pep8 guidlines NumPy style guide thanks