Error

[Solved] TypeError: method() takes 1 positional argument but 2 were given

From teaching hundreds of thousands of students Python, I found this error to be a classic. I think understanding classes is hard enough, but many coders who’ve just started to learn about Python are rightly confused 😖 about the TypeError that complains about too few positional arguments. Let’s resolve this confusion once and for all, …

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[Fixed] Unknown label type: ‘continuous’ in sklearn LogisticRegression

Summary: Use SKLearn’s LogisticRegression Model for classification problems only. The Y variable is a category (e.g., binary [0,1]), not continuous (e.g. float numbers 3.4, 7.9). If the Y variable is non-categorical (i.e., continuous), the potential fixes are as follows. Re-examine the data. Try to encode the continuous Y variable into categories (e.g., use SKLearn’s LabelEncoder preprocessor). Re-examine …

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[Fixed] ImportError: No module named requests

Problem Formulation: How to fix ImportError: No module named requests in Python? You might be working on a web scraping project and want to import the requests library and check the status of the response. However, as soon as you try to execute your code, Python throws ImportError as shown below. Example: Output: ✨ The Requests Library Requests …

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[Solved] TypeError: A Bytes-Like object Is Required, not ‘str’

Introduction Objective: In this tutorial, our goal is to fix the following exception TypeError: A Bytes-Like object Is Required, not ‘str’ and also discuss similar exceptions along with their solutions. Example: Consider the following file ‘scores.txt’which contains scores of some random candidates. Now, let us try to access the score obtained by Ravi from the …

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[Solved] NumPy RuntimeWarning: All-NaN slice encountered

Problem Formulation You use NumPy’s np.nanmedian() function in your code that is supposed to ignore NaN values when computing the mean of a NumPy array. But when using it, NumPy raises a RuntimeWarning: All-NaN slice encountered message: What is the reason for this warning and how to fix it? Solution + Explanation The reason this …

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IndentationError: Unindent Does Not Match Any Outer Indentation Level

Summary: The error IndentationError: unindent does not match any outer indentation level arises if you use inconsistent indentation of tabs or whitespaces for indented code blocks such as the if block and the for loop. For example, Python will throw an indentation error, if you use a for loop with four whitespace characters indentation for the first line, and one tab character indentation of the second line …

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Difference Between exit() and sys.exit() in Python

Problem: There are two similarly-named functions in Python, exit() and sys.exit(). What’s the difference between them, and when should I use one over the other? Introduction In contrast to programming languages like C, there is no main() method in Python. Thus, when we run a program in Python, we essentially execute all the code in the top-level file, …

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How To Fix TypeError: List Indices Must Be Integers Or Slices, Not ‘Str’?

✯ Overview Problem: Fixing TypeError: list indices must be integers or slices, not str in Python. Example: The following code lists a certain number of transactions entered by the user. Output: Solution: Please go through this solution only after you have gone through the scenarios mentioned below. Bugs like these can be really frustrating! 😤 But, …

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How to Fix TypeError: Can’t Multiply Sequence by non-int of Type ‘float’ In Python?

✯ Overview Problem: Fixing TypeError: Can’t Multiply Sequence by non-int of Type ‘float’ in Python. Example: Consider that you want to calculate the circumference of a circle using the radius entered by the user, as shown below. As you can see above, we encountered a TypeError while executing our code. Bugs like these can be …

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