I have two columns in a feature class. One has null values, the other has values. I want the one with values (TEXTSTRING) to be placed into the one without (HouseNumber). I know this is simple, but I can't remember how to make one field equal another within arcpy. Currently the code is as below:

```
arcpy.CalculateField_management(newFc, "HouseNumber","!HouseNumber! = !TEXTSTRING!", "PYTHON_9.3")

```