I have a python script in the field calculator that reads dates and populates a status field. When there is an empty value in the "actual" field, that is the status of the project. Here is the code that I use:
def cal(rec_a, soc_a, stk_a, plat_a, perm_a, per_a, status):
if rec_a == " ":
return "Field"
elif soc_a == " ":
return "Consult"
elif stk_a == " ":
return "Stake"
elif plat_a == " ":
return "Plat"
elif perm_a == " ":
return "Permit"
elif per_a == " ":
return "Waiting"
elif (per_a is not None) or (per_a == " "):
return "Permit Rec"
And the expression is:
cal (!Recon_act!, !SOcons_act!, !Stake_act!, !Plat_act!, !permit_act!, !PerRec_act!, !status!)
How do I use that same expression, but instead of reading empty fields it reads Null values?
if rec_a IsNull: ?
if rec_a == Null: ?
Best Answer
You can create a list and check if your value exists in that list. Place your possible Null/empty/spaced values into that list and check them all at once.
None
is the python keyword for Null.If you want to find Nulls separate to empty values, use
is None