Questions
Find answers to frequently asked development questions. For information about Better Stack products, explore our docs.
How Do I Undo ‘Git Add’ before Commit?
To undo a git add command before committing your changes, you can use the git reset command. Here's how you can do it: Step 1: Check the Status First, check the status of your files to see which on...
How Can I Rename a Local Git Branch?
To rename a local Git branch, you can use the following steps: Step 1: Checkout a New Branch First, make sure you're not on the branch you want to rename: git checkout <branch-to-rename> Step 2: Re...
What Is the Difference between ‘Git Pull’ and ‘Git Fetch’?
git pull and git fetch are both Git commands used to update your local repository with changes from a remote repository. However, they work differently.
How Do I Delete a Git Branch Locally and Remotely?
To delete a Git branch both locally and remotely, you'll need to follow a couple of steps. Here's how you can do it: Step 1: Delete the branch locally First, you need to delete the branch from your...
How Do I Undo the Most Recent Local Commits in Git?
To undo the most recent local commits in Git, you have a few options depending on what you want to achieve. Here's how you can do it: Undoing the commit but keeping changes: If you want to keep the...
Change Column Type in Pandas
To change the column type in a pandas DataFrame, you can use the astype() method. Here's how you can do it: import pandas as pd Sample DataFrame data = {'A': [1, 2, 3], 'B': [4.0, 5.0, 6.0]} df = p...
How to Put the Legend outside the Plot
To put the legend outside the plot in Matplotlib, you can use the bbox_to_anchor parameter of the plt.legend() function along with the loc parameter to specify the location outside the plot area. H...
How to Check for Nan Values
In pandas, you can check for NaN (Not a Number) values using the isna() or isnull() methods. These methods return a DataFrame of the same shape as the original DataFrame, where each element is True...
How to Change the Order of Dataframe Columns?
To change the order of DataFrame columns in pandas, you can simply reassign the DataFrame with the desired column order. Here's how you can do it: Suppose you have a DataFrame named df: import pand...
What Is the Python 3 Equivalent of “Python -M Simplehttpserver”
The Python 3 equivalent of python -m SimpleHTTPServer is: python -m http.server In Python 3, the http.server module provides a simple HTTP server that serves files from the current directory and it...
How Do I Install Pip on Macos or OS X?
On macOS or OS X, pip is typically installed alongside Python. If you've installed Python using the official installer from python.org or via Homebrew, pip should already be available. Here's how y...
If/Else in a List Comprehension
You can use if/else statements in a list comprehension to conditionally include elements in the resulting list. The syntax for this is: Here's an example: List comprehension with if/else numbers = ...
How Do I Get the Filename without the Extension from a Path in Python?
You can get the filename without the extension from a path in Python using the os.path module. Here's how you can do it: import os File path file_path = '/path/to/file.txt' Get the filename without...
Why Do Python Classes Inherit Object?
In Python 2.x, it was not necessary to explicitly inherit from the object class when defining a new class. However, in Python 3.x, it is recommended to explicitly inherit from object for several re...
Save Plot to Image File Instead of Displaying It?
To save a plot to an image file instead of displaying it, you can use the savefig() function provided by the matplotlib.pyplot module. Here's how you can do it: import matplotlib.pyplot as plt Gene...
How to Use Relative Imports in Python?
Relative imports in Python are used to import modules relative to the current module's location in the package hierarchy. They are specified using dot notation to indicate the relative position of ...
How to Prettyprint a Json File in Python?
You can pretty print a JSON file in Python using the json module's loads() function to parse the JSON data, and then the json.dumps() function with the indent parameter to output it in a readable f...
How to Create Static Methods in Python?
In Python, a static method is a method that belongs to a class but does not operate on instances of that class. Unlike instance methods, static methods do not have access to the instance (self) or ...
How to Read a File Line-by-Line into a List?
You can read a file line-by-line into a list in Python using a loop to iterate over each line in the file and appending each line to a list. Here's how you can do it: Open the file for reading with...
How to Test a Single File Under Pytest
To run a single test file with pytest, use the command pytest followed by the file path: pytest tests/test_file.py To execute a specific test within that file, append :: and the test name to the fi...
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