{"id":128530,"date":"2022-10-01T19:12:31","date_gmt":"2022-10-01T19:12:31","guid":{"rendered":"https:\/\/blog.finxter.com\/?p=742932"},"modified":"2022-10-01T19:12:31","modified_gmt":"2022-10-01T19:12:31","slug":"fixed-python-typeerror-bool-object-is-not-subscriptable","status":"publish","type":"post","link":"https:\/\/sickgaming.net\/blog\/2022\/10\/01\/fixed-python-typeerror-bool-object-is-not-subscriptable\/","title":{"rendered":"(Fixed) Python TypeError \u2018bool\u2019 object is not subscriptable"},"content":{"rendered":"\n
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5\/5 – (1 vote) <\/div>\n<\/div>\n
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\"\"<\/figure>\n<\/div>\n

Problem Formulation<\/h2>\n

Consider the following minimal example where a TypeError: 'bool' object is not subscriptable<\/code> occurs:<\/p>\n

boo = True\nboo[0]\n# or:\nboo[3:6]<\/pre>\n
This yields the following output:<\/p>\n
Traceback (most recent call last): File \"C:\\Users\\xcent\\Desktop\\code.py\", line 2, in <module> boo[0]\nTypeError: 'bool' object is not subscriptable<\/pre>\n
Solution Overview<\/h2>\n
Python raises the TypeError: 'bool' object is not subscriptable<\/code> if you use indexing or slicing with the square bracket notation on a Boolean variable. However, the Boolean type is not indexable and you cannot slice it—it’s not iterable<\/a>! <\/p>\n
In other words, the Boolean class doesn’t define the __getitem__()<\/a><\/code> method. <\/p>\n
boo = True\nboo[0] # Error!\nboo[3:6] # Error!\nboo[-1] # Error!\nboo[:] # Error!<\/pre>\n
You can fix this error by<\/p>\n
    \n
  1. converting the Boolean to a string using the str()<\/a><\/code> function because strings are subscriptable,<\/li>\n
  2. removing the indexing or slicing call,<\/li>\n
  3. defining a dummy __getitem__()<\/a><\/code> method for a custom “Boolean wrapper class”.<\/li>\n<\/ol>\n
    \"\ud83c\udf0d\" Related Tutorials<\/strong>: Check out our tutorials on indexing<\/a> and slicing<\/a> on the Finxter blog to improve your skills!<\/p>\n
    Method 1: Convert Boolean to a String<\/h2>\n
    If you want to access individual characters of the “Boolean” strings \"True\"<\/code> and \"False\"<\/code>, consider converting the Boolean to a string using the str()<\/a><\/code> built-in function. A string is subscriptable so the error will not occur when trying to index or slice the converted string.<\/p>\n
    boo = True\nboo_string = str(boo) print(boo_string[0])\n# T\nprint(boo_string[1:-1])\n# ru\n<\/pre>\n
    Method 2: Put Boolean Into List<\/h2>\n
    A simple way to resolve this error is to put the Boolean into a list that is subscriptable—that is you can use indexing or slicing on lists that define the __getitem__()<\/code> magic method. <\/p>\n
    bools = [True, True, True, False, False, False, True, False]\nprint(bools[-1])\n# False print(bools[3:-3])\n# [False, False]<\/pre>\n
    Method 3: Define the __getitem__() Magic Method<\/h2>\n
    You can also define your own wrapper type around the Boolean variable that defines a dunder method for __getitem__()<\/a><\/code> so that every indexing or slicing operation returns a specified value as defined in the dunder method. <\/p>\n
    class MyBool: def __init__(self, boo): self.boo = boo def __getitem__(self, index): return self.boo my_boolean = MyBool(True) print(my_boolean[0])\n# True print(my_boolean[:-1])\n# True\n<\/pre>\n
    This hack is generally not recommended, I included it just for comprehensibility and to teach you something new. \"\ud83d\ude09\"<\/p>\n
    Summary<\/h2>\n
    The error message “TypeError: 'boolean' object is not subscriptable<\/code>” happens if you access a boolean boo<\/code> like a list such as boo[0]<\/code> or boo[1:4]<\/code>. To solve this error, avoid using slicing or indexing on a Boolean or use a subscriptable object such as lists or strings.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"
    5\/5 – (1 vote) Problem Formulation Consider the following minimal example where a TypeError: ‘bool’ object is not subscriptable occurs: boo = True boo[0] # or: boo[3:6] This yields the following output: Traceback (most recent call last): File “C:\\Users\\xcent\\Desktop\\code.py”, line 2, in <module> boo[0] TypeError: ‘bool’ object is not subscriptable Solution Overview Python raises the […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[857],"tags":[73,468,528],"class_list":["post-128530","post","type-post","status-publish","format-standard","hentry","category-python-tut","tag-programming","tag-python","tag-tutorial"],"_links":{"self":[{"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/posts\/128530","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/comments?post=128530"}],"version-history":[{"count":0,"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/posts\/128530\/revisions"}],"wp:attachment":[{"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/media?parent=128530"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/categories?post=128530"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/tags?post=128530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}