Unexpected IndexError

[ericgcc]

Hi, I'm a big fan of this library and have been using it for a while, however recently I ran into a problem for which I don't understand the reason.

I define an Enumerable object, as shown below:

ACI = Enumerable([
    {"aci": 0, "hex": "#000000", "rgb": (0, 0, 0)},
    {"aci": 1, "hex": "#FF0000", "rgb": (255, 0, 0)},
    {"aci": 2, "hex": "#FFFF00", "rgb": (255, 255, 0)},
    {"aci": 3, "hex": "#00FF00", "rgb": (0, 255, 0)},
    {"aci": 4, "hex": "#00FFFF", "rgb": (0, 255, 255)},
    {"aci": 5, "hex": "#0000FF", "rgb": (0, 0, 255)},
    {"aci": 6, "hex": "#FF00FF", "rgb": (255, 0, 255)},
    {"aci": 7, "hex": "#FFFFFF", "rgb": (255, 255, 255)},
    {"aci": 8, "hex": "#414141", "rgb": (65, 65, 65)},
    {"aci": 9, "hex": "#808080", "rgb": (128, 128, 128)},
    {"aci": 10, "hex": "#FF0000", "rgb": (255, 0, 0)},
    {"aci": 11, "hex": "#FFAAAA", "rgb": (255, 170, 170)},
    {"aci": 12, "hex": "#BD0000", "rgb": (189, 0, 0)},
    {"aci": 13, "hex": "#BD7E7E", "rgb": (189, 126, 126)},
    {"aci": 14, "hex": "#810000", "rgb": (129, 0, 0)},
    {"aci": 15, "hex": "#815656", "rgb": (129, 86, 86)},
    {"aci": 16, "hex": "#680000", "rgb": (104, 0, 0)},
    {"aci": 17, "hex": "#684545", "rgb": (104, 69, 69)},
    {"aci": 18, "hex": "#4F0000", "rgb": (79, 0, 0)},
    {"aci": 19, "hex": "#4F3535", "rgb": (79, 53, 53)},
    {"aci": 20, "hex": "#FF3F00", "rgb": (255, 63, 0)},
    {"aci": 21, "hex": "#FFBFAA", "rgb": (255, 191, 170)},
    {"aci": 22, "hex": "#BD2E00", "rgb": (189, 46, 0)},
    {"aci": 23, "hex": "#BD8D7E", "rgb": (189, 141, 126)},
    {"aci": 24, "hex": "#811F00", "rgb": (129, 31, 0)},
    {"aci": 25, "hex": "#816056", "rgb": (129, 96, 86)},
    {"aci": 26, "hex": "#681900", "rgb": (104, 25, 0)},
    {"aci": 27, "hex": "#684E45", "rgb": (104, 78, 69)},
    {"aci": 28, "hex": "#4F1300", "rgb": (79, 19, 0)},
    {"aci": 29, "hex": "#4F3B35", "rgb": (79, 59, 53)},
    {"aci": 30, "hex": "#FF7F00", "rgb": (255, 127, 0)},
    {"aci": 31, "hex": "#FFD4AA", "rgb": (255, 212, 170)},
    {"aci": 32, "hex": "#BD5E00", "rgb": (189, 94, 0)},
    {"aci": 33, "hex": "#BD9D7E", "rgb": (189, 157, 126)},
    {"aci": 34, "hex": "#814000", "rgb": (129, 64, 0)},
    {"aci": 35, "hex": "#816B56", "rgb": (129, 107, 86)},
    {"aci": 36, "hex": "#683400", "rgb": (104, 52, 0)},
    {"aci": 37, "hex": "#685645", "rgb": (104, 86, 69)},
    {"aci": 38, "hex": "#4F2700", "rgb": (79, 39, 0)},
    {"aci": 39, "hex": "#4F4235", "rgb": (79, 66, 53)},
    {"aci": 40, "hex": "#FFBF00", "rgb": (255, 191, 0)},
    {"aci": 41, "hex": "#FFEAAA", "rgb": (255, 234, 170)},
    {"aci": 42, "hex": "#BD8D00", "rgb": (189, 141, 0)},
    {"aci": 43, "hex": "#BDAD7E", "rgb": (189, 173, 126)},
    {"aci": 44, "hex": "#816000", "rgb": (129, 96, 0)},
    {"aci": 45, "hex": "#817656", "rgb": (129, 118, 86)},
    {"aci": 46, "hex": "#684E00", "rgb": (104, 78, 0)},
    {"aci": 47, "hex": "#685F45", "rgb": (104, 95, 69)},
    {"aci": 48, "hex": "#4F3B00", "rgb": (79, 59, 0)},
    {"aci": 49, "hex": "#4F4935", "rgb": (79, 73, 53)},
    {"aci": 50, "hex": "#FFFF00", "rgb": (255, 255, 0)},
    {"aci": 51, "hex": "#FFFFAA", "rgb": (255, 255, 170)},
    {"aci": 52, "hex": "#BDBD00", "rgb": (189, 189, 0)},
    {"aci": 53, "hex": "#BDBD7E", "rgb": (189, 189, 126)},
    {"aci": 54, "hex": "#818100", "rgb": (129, 129, 0)},
    {"aci": 55, "hex": "#818156", "rgb": (129, 129, 86)},
    {"aci": 56, "hex": "#686800", "rgb": (104, 104, 0)},
    {"aci": 57, "hex": "#686845", "rgb": (104, 104, 69)},
    {"aci": 58, "hex": "#4F4F00", "rgb": (79, 79, 0)},
    {"aci": 59, "hex": "#4F4F35", "rgb": (79, 79, 53)},
    {"aci": 60, "hex": "#BFFF00", "rgb": (191, 255, 0)},
    {"aci": 61, "hex": "#EAFFAA", "rgb": (234, 255, 170)},
    {"aci": 62, "hex": "#8DBD00", "rgb": (141, 189, 0)},
    {"aci": 63, "hex": "#ADBD7E", "rgb": (173, 189, 126)},
    {"aci": 64, "hex": "#608100", "rgb": (96, 129, 0)},
    {"aci": 65, "hex": "#768156", "rgb": (118, 129, 86)},
    {"aci": 66, "hex": "#4E6800", "rgb": (78, 104, 0)},
    {"aci": 67, "hex": "#5F6845", "rgb": (95, 104, 69)},
    {"aci": 68, "hex": "#3B4F00", "rgb": (59, 79, 0)},
    {"aci": 69, "hex": "#494F35", "rgb": (73, 79, 53)},
    {"aci": 70, "hex": "#7FFF00", "rgb": (127, 255, 0)},
    {"aci": 71, "hex": "#D4FFAA", "rgb": (212, 255, 170)},
    {"aci": 72, "hex": "#5EBD00", "rgb": (94, 189, 0)},
    {"aci": 73, "hex": "#9DBD7E", "rgb": (157, 189, 126)},
    {"aci": 74, "hex": "#408100", "rgb": (64, 129, 0)},
    {"aci": 75, "hex": "#6B8156", "rgb": (107, 129, 86)},
    {"aci": 76, "hex": "#346800", "rgb": (52, 104, 0)},
    {"aci": 77, "hex": "#566845", "rgb": (86, 104, 69)},
    {"aci": 78, "hex": "#274F00", "rgb": (39, 79, 0)},
    {"aci": 79, "hex": "#424F35", "rgb": (66, 79, 53)},
    {"aci": 80, "hex": "#3FFF00", "rgb": (63, 255, 0)},
    {"aci": 81, "hex": "#BFFFAA", "rgb": (191, 255, 170)},
    {"aci": 82, "hex": "#2EBD00", "rgb": (46, 189, 0)},
    {"aci": 83, "hex": "#8DBD7E", "rgb": (141, 189, 126)},
    {"aci": 84, "hex": "#1F8100", "rgb": (31, 129, 0)},
    {"aci": 85, "hex": "#608156", "rgb": (96, 129, 86)},
    {"aci": 86, "hex": "#196800", "rgb": (25, 104, 0)},
    {"aci": 87, "hex": "#4E6845", "rgb": (78, 104, 69)},
    {"aci": 88, "hex": "#134F00", "rgb": (19, 79, 0)},
    {"aci": 89, "hex": "#3B4F35", "rgb": (59, 79, 53)},
    {"aci": 90, "hex": "#00FF00", "rgb": (0, 255, 0)},
    {"aci": 91, "hex": "#AAFFAA", "rgb": (170, 255, 170)},
    {"aci": 92, "hex": "#00BD00", "rgb": (0, 189, 0)},
    {"aci": 93, "hex": "#7EBD7E", "rgb": (126, 189, 126)},
    {"aci": 94, "hex": "#008100", "rgb": (0, 129, 0)},
    {"aci": 95, "hex": "#568156", "rgb": (86, 129, 86)},
    {"aci": 96, "hex": "#006800", "rgb": (0, 104, 0)},
    {"aci": 97, "hex": "#456845", "rgb": (69, 104, 69)},
    {"aci": 98, "hex": "#004F00", "rgb": (0, 79, 0)},
    {"aci": 99, "hex": "#354F35", "rgb": (53, 79, 53)},
    {"aci": 100, "hex": "#00FF3F", "rgb": (0, 255, 63)},
    {"aci": 101, "hex": "#AAFFBF", "rgb": (170, 255, 191)},
    {"aci": 102, "hex": "#00BD2E", "rgb": (0, 189, 46)},
    {"aci": 103, "hex": "#7EBD8D", "rgb": (126, 189, 141)},
    {"aci": 104, "hex": "#00811F", "rgb": (0, 129, 31)},
    {"aci": 105, "hex": "#568160", "rgb": (86, 129, 96)},
    {"aci": 106, "hex": "#006819", "rgb": (0, 104, 25)},
    {"aci": 107, "hex": "#45684E", "rgb": (69, 104, 78)},
    {"aci": 108, "hex": "#004F13", "rgb": (0, 79, 19)},
    {"aci": 109, "hex": "#354F3B", "rgb": (53, 79, 59)},
    {"aci": 110, "hex": "#00FF7F", "rgb": (0, 255, 127)},
    {"aci": 111, "hex": "#AAFFD4", "rgb": (170, 255, 212)},
    {"aci": 112, "hex": "#00BD5E", "rgb": (0, 189, 94)},
    {"aci": 113, "hex": "#7EBD9D", "rgb": (126, 189, 157)},
    {"aci": 114, "hex": "#008140", "rgb": (0, 129, 64)},
    {"aci": 115, "hex": "#56816B", "rgb": (86, 129, 107)},
    {"aci": 116, "hex": "#006834", "rgb": (0, 104, 52)},
    {"aci": 117, "hex": "#456856", "rgb": (69, 104, 86)},
    {"aci": 118, "hex": "#004F27", "rgb": (0, 79, 39)},
    {"aci": 119, "hex": "#354F42", "rgb": (53, 79, 66)},
    {"aci": 120, "hex": "#00FFBF", "rgb": (0, 255, 191)},
    {"aci": 121, "hex": "#AAFFEA", "rgb": (170, 255, 234)},
    {"aci": 122, "hex": "#00BD8D", "rgb": (0, 189, 141)},
    {"aci": 123, "hex": "#7EBDAD", "rgb": (126, 189, 173)},
    {"aci": 124, "hex": "#008160", "rgb": (0, 129, 96)},
    {"aci": 125, "hex": "#568176", "rgb": (86, 129, 118)},
    {"aci": 126, "hex": "#00684E", "rgb": (0, 104, 78)},
    {"aci": 127, "hex": "#45685F", "rgb": (69, 104, 95)},
    {"aci": 128, "hex": "#004F3B", "rgb": (0, 79, 59)},
    {"aci": 129, "hex": "#354F49", "rgb": (53, 79, 73)},
    {"aci": 130, "hex": "#00FFFF", "rgb": (0, 255, 255)},
    {"aci": 131, "hex": "#AAFFFF", "rgb": (170, 255, 255)},
    {"aci": 132, "hex": "#00BDBD", "rgb": (0, 189, 189)},
    {"aci": 133, "hex": "#7EBDBD", "rgb": (126, 189, 189)},
    {"aci": 134, "hex": "#008181", "rgb": (0, 129, 129)},
    {"aci": 135, "hex": "#568181", "rgb": (86, 129, 129)},
    {"aci": 136, "hex": "#006868", "rgb": (0, 104, 104)},
    {"aci": 137, "hex": "#456868", "rgb": (69, 104, 104)},
    {"aci": 138, "hex": "#004F4F", "rgb": (0, 79, 79)},
    {"aci": 139, "hex": "#354F4F", "rgb": (53, 79, 79)},
    {"aci": 140, "hex": "#00BFFF", "rgb": (0, 191, 255)},
    {"aci": 141, "hex": "#AAEAFF", "rgb": (170, 234, 255)},
    {"aci": 142, "hex": "#008DBD", "rgb": (0, 141, 189)},
    {"aci": 143, "hex": "#7EADBD", "rgb": (126, 173, 189)},
    {"aci": 144, "hex": "#006081", "rgb": (0, 96, 129)},
    {"aci": 145, "hex": "#567681", "rgb": (86, 118, 129)},
    {"aci": 146, "hex": "#004E68", "rgb": (0, 78, 104)},
    {"aci": 147, "hex": "#455F68", "rgb": (69, 95, 104)},
    {"aci": 148, "hex": "#003B4F", "rgb": (0, 59, 79)},
    {"aci": 149, "hex": "#35494F", "rgb": (53, 73, 79)},
    {"aci": 150, "hex": "#007FFF", "rgb": (0, 127, 255)},
    {"aci": 151, "hex": "#AAD4FF", "rgb": (170, 212, 255)},
    {"aci": 152, "hex": "#005EBD", "rgb": (0, 94, 189)},
    {"aci": 153, "hex": "#7E9DBD", "rgb": (126, 157, 189)},
    {"aci": 154, "hex": "#004081", "rgb": (0, 64, 129)},
    {"aci": 155, "hex": "#566B81", "rgb": (86, 107, 129)},
    {"aci": 156, "hex": "#003468", "rgb": (0, 52, 104)},
    {"aci": 157, "hex": "#455668", "rgb": (69, 86, 104)},
    {"aci": 158, "hex": "#00274F", "rgb": (0, 39, 79)},
    {"aci": 159, "hex": "#35424F", "rgb": (53, 66, 79)},
    {"aci": 160, "hex": "#003FFF", "rgb": (0, 63, 255)},
    {"aci": 161, "hex": "#AABFFF", "rgb": (170, 191, 255)},
    {"aci": 162, "hex": "#002EBD", "rgb": (0, 46, 189)},
    {"aci": 163, "hex": "#7E8DBD", "rgb": (126, 141, 189)},
    {"aci": 164, "hex": "#001F81", "rgb": (0, 31, 129)},
    {"aci": 165, "hex": "#566081", "rgb": (86, 96, 129)},
    {"aci": 166, "hex": "#001968", "rgb": (0, 25, 104)},
    {"aci": 167, "hex": "#454E68", "rgb": (69, 78, 104)},
    {"aci": 168, "hex": "#00134F", "rgb": (0, 19, 79)},
    {"aci": 169, "hex": "#353B4F", "rgb": (53, 59, 79)},
    {"aci": 170, "hex": "#0000FF", "rgb": (0, 0, 255)},
    {"aci": 171, "hex": "#AAAAFF", "rgb": (170, 170, 255)},
    {"aci": 172, "hex": "#0000BD", "rgb": (0, 0, 189)},
    {"aci": 173, "hex": "#7E7EBD", "rgb": (126, 126, 189)},
    {"aci": 174, "hex": "#000081", "rgb": (0, 0, 129)},
    {"aci": 175, "hex": "#565681", "rgb": (86, 86, 129)},
    {"aci": 176, "hex": "#000068", "rgb": (0, 0, 104)},
    {"aci": 177, "hex": "#454568", "rgb": (69, 69, 104)},
    {"aci": 178, "hex": "#00004F", "rgb": (0, 0, 79)},
    {"aci": 179, "hex": "#35354F", "rgb": (53, 53, 79)},
    {"aci": 180, "hex": "#3F00FF", "rgb": (63, 0, 255)},
    {"aci": 181, "hex": "#BFAAFF", "rgb": (191, 170, 255)},
    {"aci": 182, "hex": "#2E00BD", "rgb": (46, 0, 189)},
    {"aci": 183, "hex": "#8D7EBD", "rgb": (141, 126, 189)},
    {"aci": 184, "hex": "#1F0081", "rgb": (31, 0, 129)},
    {"aci": 185, "hex": "#605681", "rgb": (96, 86, 129)},
    {"aci": 186, "hex": "#190068", "rgb": (25, 0, 104)},
    {"aci": 187, "hex": "#4E4568", "rgb": (78, 69, 104)},
    {"aci": 188, "hex": "#13004F", "rgb": (19, 0, 79)},
    {"aci": 189, "hex": "#3B354F", "rgb": (59, 53, 79)},
    {"aci": 190, "hex": "#7F00FF", "rgb": (127, 0, 255)},
    {"aci": 191, "hex": "#D4AAFF", "rgb": (212, 170, 255)},
    {"aci": 192, "hex": "#5E00BD", "rgb": (94, 0, 189)},
    {"aci": 193, "hex": "#9D7EBD", "rgb": (157, 126, 189)},
    {"aci": 194, "hex": "#400081", "rgb": (64, 0, 129)},
    {"aci": 195, "hex": "#6B5681", "rgb": (107, 86, 129)},
    {"aci": 196, "hex": "#340068", "rgb": (52, 0, 104)},
    {"aci": 197, "hex": "#564568", "rgb": (86, 69, 104)},
    {"aci": 198, "hex": "#27004F", "rgb": (39, 0, 79)},
    {"aci": 199, "hex": "#42354F", "rgb": (66, 53, 79)},
    {"aci": 200, "hex": "#BF00FF", "rgb": (191, 0, 255)},
    {"aci": 201, "hex": "#EAAAFF", "rgb": (234, 170, 255)},
    {"aci": 202, "hex": "#8D00BD", "rgb": (141, 0, 189)},
    {"aci": 203, "hex": "#AD7EBD", "rgb": (173, 126, 189)},
    {"aci": 204, "hex": "#600081", "rgb": (96, 0, 129)},
    {"aci": 205, "hex": "#765681", "rgb": (118, 86, 129)},
    {"aci": 206, "hex": "#4E0068", "rgb": (78, 0, 104)},
    {"aci": 207, "hex": "#5F4568", "rgb": (95, 69, 104)},
    {"aci": 208, "hex": "#3B004F", "rgb": (59, 0, 79)},
    {"aci": 209, "hex": "#49354F", "rgb": (73, 53, 79)},
    {"aci": 210, "hex": "#FF00FF", "rgb": (255, 0, 255)},
    {"aci": 211, "hex": "#FFAAFF", "rgb": (255, 170, 255)},
    {"aci": 212, "hex": "#BD00BD", "rgb": (189, 0, 189)},
    {"aci": 213, "hex": "#BD7EBD", "rgb": (189, 126, 189)},
    {"aci": 214, "hex": "#810081", "rgb": (129, 0, 129)},
    {"aci": 215, "hex": "#815681", "rgb": (129, 86, 129)},
    {"aci": 216, "hex": "#680068", "rgb": (104, 0, 104)},
    {"aci": 217, "hex": "#684568", "rgb": (104, 69, 104)},
    {"aci": 218, "hex": "#4F004F", "rgb": (79, 0, 79)},
    {"aci": 219, "hex": "#4F354F", "rgb": (79, 53, 79)},
    {"aci": 220, "hex": "#FF00BF", "rgb": (255, 0, 191)},
    {"aci": 221, "hex": "#FFAAEA", "rgb": (255, 170, 234)},
    {"aci": 222, "hex": "#BD008D", "rgb": (189, 0, 141)},
    {"aci": 223, "hex": "#BD7EAD", "rgb": (189, 126, 173)},
    {"aci": 224, "hex": "#810060", "rgb": (129, 0, 96)},
    {"aci": 225, "hex": "#815676", "rgb": (129, 86, 118)},
    {"aci": 226, "hex": "#68004E", "rgb": (104, 0, 78)},
    {"aci": 227, "hex": "#68455F", "rgb": (104, 69, 95)},
    {"aci": 228, "hex": "#4F003B", "rgb": (79, 0, 59)},
    {"aci": 229, "hex": "#4F3549", "rgb": (79, 53, 73)},
    {"aci": 230, "hex": "#FF007F", "rgb": (255, 0, 127)},
    {"aci": 231, "hex": "#FFAAD4", "rgb": (255, 170, 212)},
    {"aci": 232, "hex": "#BD005E", "rgb": (189, 0, 94)},
    {"aci": 233, "hex": "#BD7E9D", "rgb": (189, 126, 157)},
    {"aci": 234, "hex": "#810040", "rgb": (129, 0, 64)},
    {"aci": 235, "hex": "#81566B", "rgb": (129, 86, 107)},
    {"aci": 236, "hex": "#680034", "rgb": (104, 0, 52)},
    {"aci": 237, "hex": "#684556", "rgb": (104, 69, 86)},
    {"aci": 238, "hex": "#4F0027", "rgb": (79, 0, 39)},
    {"aci": 239, "hex": "#4F3542", "rgb": (79, 53, 66)},
    {"aci": 240, "hex": "#FF003F", "rgb": (255, 0, 63)},
    {"aci": 241, "hex": "#FFAABF", "rgb": (255, 170, 191)},
    {"aci": 242, "hex": "#BD002E", "rgb": (189, 0, 46)},
    {"aci": 243, "hex": "#BD7E8D", "rgb": (189, 126, 141)},
    {"aci": 244, "hex": "#81001F", "rgb": (129, 0, 31)},
    {"aci": 245, "hex": "#815660", "rgb": (129, 86, 96)},
    {"aci": 246, "hex": "#680019", "rgb": (104, 0, 25)},
    {"aci": 247, "hex": "#68454E", "rgb": (104, 69, 78)},
    {"aci": 248, "hex": "#4F0013", "rgb": (79, 0, 19)},
    {"aci": 249, "hex": "#4F353B", "rgb": (79, 53, 59)},
    {"aci": 250, "hex": "#333333", "rgb": (51, 51, 51)},
    {"aci": 251, "hex": "#505050", "rgb": (80, 80, 80)},
    {"aci": 252, "hex": "#696969", "rgb": (105, 105, 105)},
    {"aci": 253, "hex": "#828282", "rgb": (130, 130, 130)},
    {"aci": 254, "hex": "#BEBEBE", "rgb": (190, 190, 190)},
    {"aci": 255, "hex": "#FFFFFF", "rgb": (255, 255, 255)},
    {"aci": 256, "hex": "#000000", "rgb": (0, 0, 0)},
])

However, when I try to do some query on the Enumerable like ACI.first(lambda c: c["aci"] == 100), in some cases I get this error:

IndexError Traceback (most recent call last)
Cell In[61], line 1
----> 1 ACI.first(lambda c: c["aci"] == 100)

File py_linq\py_linq.py:199, in Enumerable.first(self, func)
192 """
193 Returns the first element in a collection
194 :func: predicate as lambda expression used to filter collection
195 :return: data element as object or NoElementsError if transformed data
196 contains no elements
197 """
198 if func is not None:
--> 199 return self.where(func).element_at(0)
200 return self.element_at(0)

File py_linq\py_linq.py:175, in Enumerable.element_at(self, n)
173 result = self[n]
174 if result is None:
--> 175 raise IndexError
176 return result

IndexError:

My gut feeling is that it's something to do with memory and how many items the Enumerable can handle, because when I run len(ACI) I don't always get 256. Any idea about it?