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Python Cramers' V Handling Missing Values & Date Fields

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I'm working on association analysis on my dataset that consist majorly of categorical features and I'm using Cramers' V and Theils U statistical measures for showcasing the association metrics.

I have 2 questions related to the same :

If there are some missing values in some of the columns in my dataset, how should I handle them while calculation Cramers' V and theils u metrics? Shall I replace the missing value with some dummy value?
Note: I'm using python's python library for the calculation of both the metrics.

dython.nominal.cramers_v(data[field1],data[field2]) and dython.nominal.theils_u(data[field1],data[field2])

If I have a column name like "Task Creation Date" that consists of DateTime values. How can I include this field as part of my association analysis? Does Cramers' V and Theils U consider date values as input ? or some conversion is required?

Any help would be much appreciated.

posted Nov 17 by Jainsaniya
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