Python function global variables?

If you want to simply access a global variable you just use its name. However to change its value you need to use the global keyword.

E.g.

global someVar
someVar = 55

This would change the value of the global variable to 55. Otherwise it would just assign 55 to a local variable.

The order of function definition listings doesn’t matter (assuming they don’t refer to each other in some way), the order they are called does.

Related Posts:

  1. filedialog, tkinter and opening files
  2. Why do I get a “referenced before assignment” error when assigning to a global variable in a function?
  3. Use of “global” keyword in Python
  4. Don’t understand why UnboundLocalError occurs (closure) [duplicate]
  5. Why do I get a “referenced before assignment” error when assigning to a global variable in a function?
  6. Defining lists as global variables in Python
  7. Maximum and Minimum values for ints
  8. FileNotFoundError: [Errno 2] No such file or directory [duplicate]
  9. python capitalize first letter only
  10. Is there a short contains function for lists?
  11. ImportError: No module named pandas. Pandas installed pip
  12. How to Execute a Python Script in Notepad++?
  13. ValueError: operands could not be broadcast together with shapes (5,) (30,)
  14. appending list but error ‘NoneType’ object has no attribute ‘append’
  15. Using Python 3 in virtualenv
  16. “Series objects are mutable and cannot be hashed” error
  17. Putting a simple if-then-else statement on one line [duplicate]
  18. matplotlib savefig() plots different from show()
  19. What is the meaning of [:] in python [duplicate]
  20. Finding and replacing elements in a list
  21. socket.error: [Errno 48] Address already in use
  22. No module named MySQLdb
  23. TypeError: Missing 1 required positional argument: ‘self’
  24. Convert a tensor to numpy array in Tensorflow?
  25. How to import the class within the same directory or sub directory?
  26. Why do I get AttributeError: ‘NoneType’ object has no attribute ‘something’?
  27. What is __pycache__?
  28. Permission denied error by installing matplotlib
  29. Python equivalent of a given wget command
  30. How to find list intersection?
  31. Error while Executing jupyter notebook: [Errno 2] No such file or directory
  32. ValueError: max() arg is an empty sequence
  33. How do I insert a JPEG image into a python Tkinter window?
  34. Use a.any() or a.all()
  35. What is the difference between Spyder and Jupyter?
  36. What is the maximum recursion depth in Python, and how to increase it?
  37. What is a mixin, and why are they useful?
  38. Python equivalent to ‘hold on’ in Matlab
  39. What does __contains__ do, what can call __contains__ function
  40. Python: find position of element in array
  41. How to get pip to work behind a proxy server
  42. How to POST JSON data with Python Requests?
  43. Determine the type of an object?
  44. enumerate() for dictionary in python
  45. How to convert a PIL Image into a numpy array?
  46. How to get autocomplete in jupyter notebook without using tab?
  47. numpy with python: convert 3d array to 2d
  48. Max retries exceeded with URL in requests
  49. Create 3D array using Python
  50. How to load a tsv file into a Pandas DataFrame?
  51. No Module Named ‘_pywrap_tensorflow_internal’
  52. Pop index out of range
  53. Is it possible to ignore one single specific line with Pylint?
  54. Print list without brackets in a single row
  55. Get first row value of a given column
  56. AttributeError: ‘module’ object has no attribute
  57. In Python How can I declare a Dynamic Array
  58. Python module for converting PDF to text
  59. from sys import argv – what is the function of “script”
  60. How to properly ignore exceptions
  61. How to print instances of a class using print()?
  62. How to filter Pandas dataframe using ‘in’ and ‘not in’ like in SQL
  63. How can I check if character in a string is a letter? (Python)
  64. OSError: Initializing from file failed on csv in Pandas
  65. What does the Ellipsis object do?
  66. How to concatenate items in a list to a single string?
  67. python pip on Windows – command ‘cl.exe’ failed
  68. pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available
  69. Extract part of a regex match
  70. Python “SyntaxError: Non-ASCII character ‘\xe2’ in file”
  71. Why is there no tuple comprehension in Python?
  72. You are trying to add a non-nullable field ‘new_field’ to userprofile without a default
  73. How do I run pip on python for windows?
  74. How to get the text cursor position in Windows?
  75. python NameError: global name ‘__file__’ is not defined
  76. Rename specific column(s) in pandas
  77. How to create a numpy array of lists?
  78. Scikit-learn GridSearch giving “ValueError: multiclass format is not supported” error
  79. Convert R code into Python code using rpy2
  80. PIL: DLL load failed: specified procedure could not be found
  81. “Cannot access setup.py: No such file or directory” – can’t run any .py files?
  82. How to obfuscate Python code effectively?
  83. Controlling mouse with Python
  84. can we use XPath with BeautifulSoup?
  85. how to check which version of nltk, scikit learn installed?
  86. How do I add two sets?
  87. How to count the number of files in a directory using Python
  88. Counting array elements in Python
  89. IPython, “name ‘plt’ not defined”
  90. Running shell command and capturing the output
  91. Determine if 2 lists have the same elements, regardless of order? [duplicate]
  92. Python copy files to a new directory and rename if file name already exists
  93. How to append new data onto a new line
  94. Building a list inside a list in python
  95. ‘pyuic5’ is not recognized as an internal or external command
  96. ValueError: multiclass format is not supported
  97. Filtering a NumPy Array
  98. Python – difference between two strings
  99. Flask-framework: MVC pattern
  100. Installing win32gui python module

Leave a Comment