Pytest is a popular test framework in Python. It helps to automate the test execution process and run unit tests as frequently as possible with minimal effort. Everyone who has at least some experience with computer programming would intuitively know that testing is critical when building a software application. But beginners often find it difficult … Read more
Learn – How to Fix : “ImportError: Cannot import name X” in Python.
Problem Formulation You create a namedtuple object in your code and you want to overwrite one of the attribute values like you’re used to for normal objects: But, unexpectedly, Python raises an AttributeError: can’t set attribute. ? What can you do? ? Let’s understand the reason this error occurs—after that you’ll learn the best fixes. … Read more
Problem Formulation Given a basic Python program. How to print an exception if it occurs without exiting the program? For example, consider the following program that raises a ZeroDivisionError: division by zero. The output is: You want the program to keep running and executing the print statement after giving you a note about the exception: … Read more
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, … Read more
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 … Read more
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 … Read more
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 … Read more
To fi TypeError: object is not subscriptable if you try to use indexing upon an object that is not subscriptable. To fix it you can:
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 … Read more
Problem Formulation You use NumPy’s np.nanmean() 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: Mean of empty slice message: What is the reason for this warning and how to fix it? Solution + Explanation The reason … Read more
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 … Read more