Python conditional assignment operator

No, the replacement is:

try:
   v
except NameError:
   v = 'bla bla'

However, wanting to use this construct is a sign of overly complicated code flow. Usually, you’d do the following:

try:
   v = complicated()
except ComplicatedError: # complicated failed
   v = 'fallback value'

and never be unsure whether v is set or not. If it’s one of many options that can either be set or not, use a dictionary and its get method which allows a default value

Related Posts:

  1. “If not” condition statement in python
  2. Check if something is (not) in a list in Python
  3. What is the naming convention in Python for variable and function names?
  4. How do I check if a variable exists?
  5. Append integer to beginning of list in Python
  6. Error: “Cannot modify the return value” c#
  7. C++ identifier is undefined
  8. Don’t understand this SyntaxError: illegal target for annotation
  9. Importing variables from another file?
  10. How to check if type of a variable is string?
  11. How can I print variable and string on same line in Python?
  12. What is the PHP syntax to check “is not null” or an empty string?
  13. Viewing all defined variables
  14. Printing variables in Python 3.4
  15. when to use if vs elif in python
  16. Copy a list of list by value and not reference
  17. How can you print a variable name in python? [duplicate]
  18. Python NameError, variable ‘not defined’
  19. ISO C90 forbids mixed declarations and code in C
  20. Which variable size to use (db, dw, dd) with x86 assembly?
  21. Why SQL Server throws Arithmetic overflow error converting int to data type numeric?
  22. Getting the name of a variable as a string
  23. Character constant too long for its type
  24. What is the purpose of the single underscore “_” variable in Python?
  25. What is the meaning of @_ in Perl?
  26. What is the meaning of @_ in Perl?
  27. Set variable in jinja
  28. Passing a variable to get_template_part
  29. What are all the Properties of the WordPress Post Object?
  30. Passing variables from header.php to template and vice verca
  31. When to use global $post and other global variables?
  32. WordPress variables and memory
  33. How to create custom variables in the wp-config
  34. Set cookie using GET variable
  35. {{ Double Curly Brace }} data.____ Variable Source in WP_Playlist Template
  36. What is the best way to store custom variables
  37. Setting Cookie Using a Variable from the URL
  38. WordPress filtering utm_ GET variables from url unless logged in as admin, not sure why?
  39. Using variable in two functions
  40. What is the $current_screen global variable?
  41. Print string to footer using wp_footer option
  42. How to pass data around?
  43. How do I pass variables into short-code enabled Post Snippets in WordPress 3.0?
  44. Replacing string with a variable in php
  45. Why does a variable work on the front page but return NULL on all other pages?
  46. Variable scope producing undefined variable notices in included files
  47. Use to track referrals
  48. Can you keep session data for visitors?
  49. Changing static text in a theme into variable content that also respects language. Easiest way
  50. Result of API Request to global variable?
  51. Best way to pass variables around a WordPress site?
  52. How do I share variables between two functions?
  53. What is the use of $content_width?
  54. Passing a variable from a FOREACH loop in a link
  55. What does the Global Variable $s represent?
  56. Get current page id, title, url, etc
  57. keep a variable for all pages in memory from the url
  58. Retrieve custom variable
  59. Pushing Category and Publish Date to Google Analytics
  60. Trying to create an edit page link?
  61. Cron Job variable not accessible
  62. No access to global variables?
  63. How to access a variable on all page?
  64. Not passing correct value to get_post_ancestors?
  65. Help me edit a variable with php
  66. SFTP define in wp-config.php
  67. Preventing Duplicating Posts from Widgets
  68. saving variables after redirect
  69. WP CLI – Pass Query / URL Variable to Cron?
  70. Use a select box to change a php variable
  71. Can’t access a variable defined in another template despite using GLOBAL
  72. How to pass a variable for key/value pairs in an argument?
  73. Where and how to define variables for URLs etc
  74. How to get variable from function.php to loop file
  75. Pass variable to next page
  76. passing javascript variable into php wordpress
  77. Remove # from a Variable [closed]
  78. How to pass post title (which could include &) to Gravity Form
  79. Variables posting twice
  80. Passing variables trough 2 pages
  81. update_option using variable name
  82. assign the returned value of wordpress function to a variable?
  83. Pass var into wp function instead of direct string text
  84. How do I echo saved data outside the function?
  85. Having problems accessing $_GET values
  86. How to pass variable to functions.php?
  87. Creating a Variable Product
  88. Putting a simple if-then-else statement on one line [duplicate]
  89. matplotlib savefig() plots different from show()
  90. subprocess.check_output return code
  91. How to load a tsv file into a Pandas DataFrame?
  92. Create empty file using python [duplicate]
  93. TypeError: string indices must be integers, not str // working with dict
  94. python getoutput() equivalent in subprocess
  95. How do I print colored output to the terminal in Python?
  96. How to calculate a Gaussian kernel matrix efficiently in numpy?
  97. AttributeError: Can only use .str accessor with string values, which use np.object_ dtype in pandas
  98. Filtering a NumPy Array
  99. Passing a variable into Contact Form 7 [closed]
  100. What is the alternative code to if (isset ($_POST) && !empty ($_POST) to avoid warnings?

Leave a Comment

error code: 523