ValueError: max() arg is an empty sequence

I’ve created a GUI using wxFormBuilder that should allow a user to enter the names of “visitors to a business” into a list and then click one of two buttons to return the most frequent and least frequent visitors to the business.

I created an earlier version that, unfortunately, gave me the range of visitors, rather than the name of the most/least frequent visitor. I’ve attached a screenshot of the GUI I’ve created to help add a little clarity to the issue ( http://imgur.com/XJnvo0U ).

A new code version takes a different tack than the earlier version, and I can’t get it to throw anything. Instead, I keep receiving this error:

ValueError: max() arg is an empty sequence

In relation to this line:

self.txtResults.Value = k.index(max(v))

import wx
import myLoopGUI
import commands

class MyLoopFrame(myLoopGUI.MyFrame1):
    def __init__(self, parent):
        myLoopGUI.MyFrame1.__init__(self, parent)

    def clkAddData(self,parent):
        if len(self.txtAddData.Value) != 0:
            try:
                myname = str(self.txtAddData.Value)
                self.listMyData.Append(str(myname))
            except:
                wx.MessageBox("This has to be a name!")            
        else:
            wx.MessageBox("This can't be empty")




    def clkFindMost(self, parent):
        self.listMyData = []
        unique_names = set(self.listMyData)
        frequencies = {}
        for name in unique_names:
            if frequencies.get[name]:
                frequencies[name] += 1
            else:
                frequencies[name] = 0

        v = list(frequencies.values())
        k = list(frequencies.keys())
        self.txtResults.Value = k.index(max(v))

Related Posts:

  1. TypeError: ‘list’ object cannot be interpreted as an integer
  2. python – if not in list
  3. How to iterate through two lists in parallel?
  4. What does the “x for x in” syntax mean?
  5. How can I reverse a list in Python?
  6. How can I reverse a list in Python?
  7. What is the difference between Python’s list methods append and extend?
  8. Understanding slice notation
  9. Understanding slice notation
  10. TypeError: list indices must be integers or slices, not str
  11. How to convert list to string [duplicate]
  12. How do I get the number of elements in a list?
  13. Finding the index of an item in a list
  14. Accessing the index in ‘for’ loops?
  15. How to make a flat list out of a list of lists
  16. Removing duplicates in lists
  17. List changes unexpectedly after assignment. Why is this and how can I prevent it?
  18. TypeError: ‘float’ object is not subscriptable
  19. Is there a short contains function for lists?
  20. TypeError: ‘float’ object is not subscriptable
  21. appending list but error ‘NoneType’ object has no attribute ‘append’
  22. Check if something is (not) in a list in Python
  23. How to avoid “RuntimeError: dictionary changed size during iteration” error?
  24. How to avoid “RuntimeError: dictionary changed size during iteration” error?
  25. Finding the average of a list
  26. Print a list in reverse order with range()?
  27. TypeError: ‘float’ object not iterable
  28. Why is it string.join(list) instead of list.join(string)?
  29. Why is it string.join(list) instead of list.join(string)?
  30. How do I concatenate two lists in Python?
  31. Finding median of list in Python
  32. Python set to list
  33. Python List vs. Array – when to use?
  34. Finding and replacing elements in a list
  35. Remove list from list in Python
  36. How can I compare two lists in python and return matches
  37. Append integer to beginning of list in Python
  38. List comprehension on a nested list?
  39. Union of two lists in Python
  40. Python: Array v. List
  41. Writing a list to a file with Python
  42. How do I check if a list is empty?
  43. Understanding slice notation
  44. Add list to set?
  45. What’s the idiomatic syntax for prepending to a short python list?
  46. How to remove an element from a list by index
  47. Apply function to each element of a list
  48. Converting Dictionary to List?
  49. Python Sets vs Lists
  50. AttributeError: ‘list’ object has no attribute ‘replace’ when trying to remove character
  51. How to deep copy a list?
  52. TypeError: list indices must be integers or slices, not str
  53. How to check if a string is a substring of items in a list of strings?
  54. ‘list’ object has no attribute ‘shape’
  55. How do I find the duplicates in a list and create another list with them?
  56. How do I check if a list is empty?
  57. How can I get list of values from dict?
  58. IndexError: list index out of range and python
  59. AttributeError: ‘list’ object has no attribute ‘replace’ when trying to remove character
  60. How to sort a list of objects based on an attribute of the objects?
  61. Pop index out of range
  62. AttributeError: ‘list’ object has no attribute ‘replace’ when trying to remove character
  63. Print list without brackets in a single row
  64. How to remove \n from a list element?
  65. how to create a list of lists
  66. Python assigning multiple variables to same value? list behavior
  67. How do I check if there are duplicates in a flat list?
  68. How to return dictionary keys as a list in Python?
  69. Append a tuple to a list – what’s the difference between two ways?
  70. Defining lists as global variables in Python
  71. Subtracting two lists in Python
  72. How can I remove all instances of an element from a list in Python?
  73. Create an empty list in Python with certain size
  74. How to concatenate items in a list to a single string?
  75. What’s the difference between lists enclosed by square brackets and parentheses in Python?
  76. Python 2: AttributeError: ‘list’ object has no attribute ‘strip’
  77. How to make a set of lists
  78. Infinite for loops possible in Python?
  79. Appending to a list gives ‘int’ object has no attribute ‘append’
  80. Python: ValueError: Mixing iteration and read methods would lose data
  81. Python data structure sort list alphabetically
  82. “for loop” with two variables?
  83. TypeError: unsupported format string passed to list.__format__
  84. numpy-equivalent of list.pop?
  85. Create nice column output in python
  86. How to create a numpy array of lists?
  87. How to fix ‘RuntimeWarning: divide by zero encountered in double_scalars’
  88. convert csv file to list of dictionaries
  89. Element-wise addition of 2 lists?
  90. How to split elements of a list?
  91. Find object in list that has attribute equal to some value (that meets any condition)
  92. Iterating through list of list in Python
  93. Python cant convert ‘list’ object to str error [closed]
  94. Get difference between two lists
  95. Determine if 2 lists have the same elements, regardless of order? [duplicate]
  96. Building a list inside a list in python
  97. Writing Python lists to columns in csv
  98. Sorting list based on values from another list
  99. “for loop” with two variables?
  100. Write a program that asks the user to enter five test scores. Correspond it to a letter grade

Leave a Comment

tech