python not null
test = "hello world"
if test is not None:
print("test is not None")
test2 = None
if test2 is None:
print("test2 is None")python not null
test = "hello world"
if test is not None:
print("test is not None")
test2 = None
if test2 is None:
print("test2 is None")python if not null
#variable
var = "hello python"
#check is not null
if var is not NaN:
print('Var is not null')python null ==
if foo is None:
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