python if not null
#variable
var = "hello python"
#check is not null
if var is not NaN:
print('Var is not null')python if not null
#variable
var = "hello python"
#check is not null
if var is not NaN:
print('Var is not null')python if not null or empty
#check is not null
if var is not None:
print('Var is not null')python null ==
if foo is None:
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