{"id":127803,"date":"2022-09-03T14:44:26","date_gmt":"2022-09-03T14:44:26","guid":{"rendered":"https:\/\/blog.finxter.com\/?p=641705"},"modified":"2022-09-03T14:44:26","modified_gmt":"2022-09-03T14:44:26","slug":"fixed-matplotlib-typeerror-axessubplot-object-is-not-subscriptable","status":"publish","type":"post","link":"https:\/\/sickgaming.net\/blog\/2022\/09\/03\/fixed-matplotlib-typeerror-axessubplot-object-is-not-subscriptable\/","title":{"rendered":"[Fixed] Matplotlib: TypeError: \u2018AxesSubplot\u2019 object is not subscriptable"},"content":{"rendered":"\n
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5\/5 – (1 vote) <\/div>\n<\/div>\n

Problem Formulation<\/h2>\n

Say, you’re me \"\ud83d\udc71\u200d\u2642\ufe0f\" five minutes ago, and you want to create a Matplotlib<\/a> plot using the following (genius) code snippet:<\/p>\n

import matplotlib.pyplot as plt fig, axes = plt.subplots()\naxes[0, 0].plot([1, 2, 3], [9, 8, 7])\nplt.show()\n<\/pre>\n
If you run this code, instead of the desired plot, you get the following TypeError: 'AxesSubplot' object is not subscriptable<\/code>:<\/p>\n
Traceback (most recent call last): File \"C:\\Users\\xcent\\Desktop\\code.py\", line 4, in <module> axes[0, 0].plot([1, 2, 3], [5, 5, 5])\nTypeError: 'AxesSubplot' object is not subscriptable<\/pre>\n
\"\ud83d\udcac\" Question<\/strong>: How to resolve the TypeError: 'AxesSubplot' object is not subscriptable<\/code> in your Python script?<\/p>\n
Don’t panic! \"\ud83d\udcd8\" The solution is easier than you think…<\/p>\n
Fix Not Subscriptable TypeError on ‘AxesSubplot’ Object<\/h2>\n
\"\ud83d\udca1\" Generally, Python raises the TypeError XXX object is not subscriptable<\/a><\/code> if you use indexing with the square bracket notation<\/a> on an object that is not indexable. In this case, you tried to index an Axes<\/code> object because you thought it was an array of Axes<\/code> objects.<\/p>\n
Let’s go over the code to understand why the error happened! <\/p>\n
First, you assign the result of the plt.subplots()<\/a><\/code> function to the two variables fig<\/code> and axes<\/code>. <\/p>\n
fig, axes = plt.subplots()<\/pre>\n
If you don’t pass an argument in the plt.subplots()<\/code> function, it creates a Figure<\/code> with one Axes<\/code> object. <\/p>\n
So if you try to subscript using axes[0,0]<\/code>, axes[0]<\/code>, or any other inde<\/a>x<\/a>ing scheme<\/a>, Python will raise an error. It’s simple: axes<\/code> doesn’t hold a container type so it cannot be indexed using the square bracket notation!<\/p>\n
So to fix the TypeError: 'AxesSubplot' object is not subscriptable<\/code>, simply remove the indexing notation on the axes object obtained by plt.subplots()<\/code> called without arguments.<\/strong><\/p>\n
import matplotlib.pyplot as plt fig, axes = plt.subplots()\naxes.plot([1, 2, 3], [9, 8, 7]) # not: axes[0, 0]\nplt.show()\n<\/pre>\n
Now it works — here’s the output:<\/p>\n
\n
\"\"<\/figure>\n<\/div>\n
What is the Reason for the Error?<\/h2>\n
However, this error is tough to spot because if you pass any other argument into the plt.subplot()<\/code> function, it creates a Figure<\/code> and a Numpy array<\/a> of Subplot<\/code>\/Axes<\/code> objects which you store in fig<\/code> and axes<\/code> respectively.<\/strong><\/p>\n
For example, this creates a non-subscriptable axes<\/strong> because you don’t pass any argument:<\/p>\n
fig, axes = plt.subplots()<\/pre>\n
For example, this creates a subscriptable array of axes<\/strong> that is a one-dimensional array of subplots because you pass an argument:<\/p>\n
fig, axes = plt.subplots(3)<\/pre>\n
For example, this creates a subscriptable array of axes<\/strong> that is a two-dimensional array of subplots because you passed two arguments<\/p>\n
fig, axes = plt.subplots(3, 2)<\/pre>\n
No wonder did you think that you can call axes[0,0]<\/code> or axes[0]<\/code> on the return value of the plt.subplot()<\/code> function! However, doing so is only possible if you didn’t pass an argument into it.<\/p>\n
Make sure you never run into similar errors by spending a couple of minutes understanding the plt.subplot()<\/code> function once and for all!<\/p>\n
Learn More about plt.subplot()<\/h2>\n
To further understand the subplots()<\/code> function, check out our detailed guide on the Finxter blog and the following video:<\/p>\n
\"YouTube<\/a>
<\/figcaption><\/figure>\n
\"\ud83c\udf0d\" Full Tutorial<\/strong>: Matplotlib Subplots \u2013 A Helpful Illustrated Guide<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
5\/5 – (1 vote) Problem Formulation Say, you’re me five minutes ago, and you want to create a Matplotlib plot using the following (genius) code snippet: import matplotlib.pyplot as plt fig, axes = plt.subplots() axes[0, 0].plot([1, 2, 3], [9, 8, 7]) plt.show() If you run this code, instead of the desired plot, you get 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-127803","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\/127803","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=127803"}],"version-history":[{"count":0,"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/posts\/127803\/revisions"}],"wp:attachment":[{"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/media?parent=127803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/categories?post=127803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sickgaming.net\/blog\/wp-json\/wp\/v2\/tags?post=127803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}