Girish RaoSummary: 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
Scikit-learn has a library of transformers to preprocess a data set. These transformers clean, generate, reduce or expand the feature representation of the data set. These transformers provide the fit(), transform() and fit_transform() methods. The fit() method identifies and learns the model parameters from a training data set. For example, standard deviation and mean for … Read more
Summary: The best way to plot a Confusion Matrix with labels, is to use the ConfusionMatrixDisplay object from the sklearn.metrics module. Another simple and elegant way is to use the seaborn.heatmap() function. Note: All the solutions provided below have been verified using Python 3.9.0b5. Problem Formulation Imagine the following lists of Actual and Predicted values … Read more
This tutorial explores the ways one can check if a variable is a class. The direct way to check if a variable is a class, is to use the isclass() runtime service, from Python’s inspect module. Use isclass() in conjunction with Python’s isinstance() built-in function, to examine a variable. Both of these return a Boolean … Read more
Summary: This blog explains the ways to apply a given function to each element of a list. The best way to apply a function to each element of a list is to use the Python built-in map() function that takes a function and one or more iterables as arguments. It then applies the function to … Read more
? Summary: This blog explores the steps to remove all non-alphabet characters from a given string. The ‘re’ module in Python provides regular expression operations, to process text. One uses these operations to manipulate text in strings. The compile() method in conjunction with the sub() method can remove all non-alphabet characters from a given string. Note: … Read more
Summary: This blog explores the steps to sort elements of a Set. Python offers the built-in sorted() function to sort elements in container objects such as a set or a list. For example: sorted({1, 5, 2}) sorts the elements in the set and returns the sorted list [1, 2, 5]. Note: All the solutions provided … Read more
Summary: This blog explains the various ways one can remove the prefix of a string in Python. How To Remove The Prefix Of A String In Python? Python 3.9 provides the removeprefix() method to aid string manipulation. The removeprefix() method of the Python String Object removes prefixes from any string. One needs to supply the … Read more
Summary: This blog explains the various ways one can extract commonly used Emojis embedded within text. Note: All the solutions provided below have been verified using Python 3.9.0b5. Problem Formulation One has a list with normal text words and emojis, all mixed together, as shown below. How does one extract only the emojis, into a … Read more
Each year, volunteers from all over the world, work on improvements to the Python Language. The official Python 3.9 version was released on October 5, 2020. This version is an improvement made to Python 3.8. The official, detailed explanation of these improvements is available at the Python Website. This blog article attempts to explain these … Read more
The Python interpreter throws the NameError exception if it encounters an undefined variable or function name. To fix it, you must figure out why the variable is not defined—the most frequent bugs are (1) to use the variable or function name in the code before it was defined, or (2) to misspell the name in … Read more
In this article, you’ll learn the ultimate answer to the following question: How To Eliminate All The Whitespace From A String—on Both Ends, and In-Between Words? Summary: Use the string methods join(), split(), strip(), rstrip(), lstrip() and or replace()—in specific combinations—to remove any whitespace in a given string. The simplest way to remove all whitespaces … Read more