Python none

 

Python None

Python None

None is a special constant in Python that represents the absence of a value.

Its data type is NoneType, and None is the only instance of a NoneType object.

NoneType

Variables can be assigned None to indicate "no value" or "not set".

ExampleGet your own Python Server

Assign and display a None value:

x = None
print(x)

Use type() to see the type of a None value.

Example

Assign and print the data type of a None value:

x = None
print(type(x))

Comparing to None

To compare a value to None, use the identity operator is or is not

Example

Use the identity operator is for comparisons with None:

result = None
if result is None:
  print("No result yet")
else:
  print("Result is ready")

Example

Similar example, but using is not instead:

result = None
if result is not None:
  print("Result is ready")
else:
  print("No result yet")

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