How-to articles, tricks, and solutions about PYTHON

You can use the xml library in Python to parse XML and get instances of a particular node attribute.

You can use the requests library in Python to send a POST request with JSON data.

To pretty-print a JSON file in Python, you can use the json module.

In Python, you can use the datetime module to work with dates and times.

To print the keys of a dictionary in Python, you can use the built-in keys() method.

In Python, you can use the built-in function format() to print a number with commas as thousands separators.

To print instances of a class using the built-in print() function, you can define a __str__ method within the class.

To print without a newline in Python, you can use the end argument for the print() function.

It's generally not recommended to ignore exceptions, as they often indicate a problem in the code that should be addressed.

In matplotlib, the legend function allows you to specify the location of the legend.

To read a file line-by-line into a list, you can use the following approach:

One way to read a text file into a list or an array with Python is to use the split() method.

In Python, you can read a text file into a string variable and strip newlines using the following code:

To remove an element from a list by index in Python, you can use the pop() method.

It is generally not recommended to remove items from a list while iterating over it because it can cause unexpected behavior.

You can replace NaN values in a column of a Pandas Dataframe by using the fillna() method and passing in the value you want to replace NaN with.

You can use the __file__ attribute of a module to retrieve its path.

In Python, you can use the dict.keys() method to return a view object that contains the keys of a dictionary.

You can use the built-in round() function to round a decimal to a specific number of decimal places in Python.

There are several ways to search and replace text in a file, depending on the programming language you are using.

Here's a Python code snippet that demonstrates how to search for a string in all text files in a directory:

To serve static files in Flask, you will need to use the send_static_file method in your route function.

In Python, you can set environment variables using the os module.

You can set the current working directory in Python using the os module, specifically the chdir() function.

In matplotlib, you can set the limit of the y-axis of a plot by using the set_ylim() method of the Axes class.