Referring to the null object in Python

In Python, the ‘null’ object is the singleton None.

The best way to check things for “Noneness” is to use the identity operator, is:

if foo is None:
    ...

Related Posts:

  1. Is there a way to create multiline comments in Python?
  2. ‘pip’ is not recognized as an internal or external command
  3. What is the purpose of the word ‘self’?
  4. Python- Robot Framework Rebot Using List
  5. how to reset index pandas dataframe after dropna() pandas dataframe
  6. How to update/upgrade a package using pip?
  7. How can I remove a specific item from an array?
  8. Behaviour of increment and decrement operators in Python
  9. Convert bytes to a string
  10. Python vs Cpython
  11. How do I update\upgrade pip itself from inside my virtual environment?
  12. Python integer incrementing with ++ [duplicate]
  13. Replacing instances of a character in a string
  14. Changing one character in a string
  15. What is the use of “assert” in Python?
  16. How can I represent an ‘Enum’ in Python?
  17. IndexError: too many indices for array
  18. IndexError: too many indices for array
  19. numpy array: IndexError: too many indices for array
  20. Python3 – ModuleNotFoundError: No module named ‘numpy’
  21. How do I specify new lines on Python, when writing on files?
  22. What is the purpose of the return statement?
  23. Relative imports – ModuleNotFoundError: No module named x
  24. bash: pip: command not found
  25. What is the difference between importing matplotlib and matplotlib.pyplot?
  26. Using global variables in a function
  27. How do I check what version of Python is running my script?
  28. How to read a large file – line by line?
  29. How to uninstall pip on OSX?
  30. How to delete a file or folder in Python?
  31. Converting integer to string in Python
  32. deleting file if it exists; python
  33. Reverse a string in Python
  34. Why am I seeing “TypeError: string indices must be integers”?
  35. Python for-in loop preceded by a variable
  36. Python Linked List
  37. What is the result of % in Python?
  38. ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
  39. How do I upgrade the Python installation in Windows 10?
  40. What does if __name__ == “__main__”: do?
  41. How to print without a newline or space
  42. Difference between del, remove, and pop on lists
  43. Python time.sleep() vs event.wait()
  44. Program to Unjumble Words on Python [closed]
  45. TypeError: ‘module’ object is not callable
  46. “inconsistent use of tabs and spaces in indentation”
  47. How can I install packages using pip according to the requirements.txt file from a local directory?
  48. Error: ‘int’ object is not subscriptable – Python
  49. How to measure elapsed time in Python?
  50. How to uninstall Anaconda completely from macOS
  51. How to overcome TypeError: unhashable type: ‘list’
  52. Python: Start and stop timer [duplicate]
  53. Does Python have a ternary conditional operator?
  54. python .replace() regex [duplicate]
  55. Selecting multiple columns in a Pandas dataframe
  56. not all arguments converted during string formatting.. NO % variables
  57. How do I install opencv using pip?
  58. TypeError: ‘builtin_function_or_method’ object is not subscriptable
  59. How do I use raw_input in Python 3
  60. Python Variable Declaration
  61. How do I compare two strings in python?
  62. SyntaxError: “can’t assign to function call”
  63. Curve curvature in numpy
  64. Relative imports in Python 3
  65. ImportError: No module named sklearn.cross_validation
  66. ImportError: No module named sklearn.cross_validation
  67. Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
  68. How can I prevent the TypeError: list indices must be integers, not tuple when copying a python list to a numpy array?
  69. What are data classes and how are they different from common classes?
  70. How to write the Fibonacci Sequence?
  71. “pip install unroll”: “python setup.py egg_info” failed with error code 1
  72. Tensorflow import error: No module named ‘tensorflow’
  73. Python random function
  74. Python Dictionary Comprehension
  75. Converting NumPy array into Python List structure?
  76. Converting string into datetime
  77. ImportError: No module named matplotlib.pyplot
  78. How do you get the logical xor of two variables in Python?
  79. How do I install pip on macOS or OS X?
  80. ValueError: could not convert string to float: id
  81. Converting string into datetime
  82. ImportError: No module named matplotlib.pyplot
  83. How do I list all files of a directory?
  84. Pip freeze vs. pip list
  85. What is the necessity of plt.figure() in matplotlib?
  86. Accessing the index in ‘for’ loops?
  87. The difference between comparison to np.nan and isnull()
  88. Best way to return multiple values from a function? [closed]
  89. ‘numpy.ndarray’ object has no attribute ‘index’
  90. return, return None, and no return at all?
  91. Python pandas – filter rows after groupby
  92. Meaning of @classmethod and @staticmethod for beginner?
  93. How to join on multiple columns in Pyspark?
  94. What does sys.stdin read?
  95. What is a ‘NoneType’ object?
  96. How to read the last line of a file in Python?
  97. urllib2.HTTPError: HTTP Error 403: Forbidden
  98. Python/Django: log to console under runserver, log to file under Apache
  99. TensorFlow not found using pip
  100. How can I find the dimensions of a matrix in Python?

Leave a Comment