How-to articles, tricks, and solutions about PYTHON

You can use the DataFrame.columns attribute to access the column labels of a DataFrame as an Index object.

Here is an example of creating a Pandas DataFrame by appending one row at a time:

Check the location of pg_config: Open a terminal and run the command "which pg_config".

The correct way to write a line to a file in Python is to use the write() method on the file object, followed by the line you want to write.

You can use the str.format() method to display a number with leading zeros in Python.

In Python, a constant is typically defined as a variable that is assigned a value that should not be modified later on in the program.

You can use the built-in max() function in Python to get the key with the maximum value in a dictionary.

In Python, you can use the "" character to indicate a line continuation.

In Python, you can use the subprocess module to run shell commands and capture their output.

This error message occurs when pip is unable to verify the certificate of the website it is trying to connect to.

In Pandas, a DataFrame is a 2-dimensional labeled data structure with columns of potentially different types.

You can use the .loc method to filter the DataFrame and get the boolean mask, and then use the .index property to get the index of the rows that match the certain value.

You can use the print() function in Python and use the + operator to concatenate a string and a variable.

In most modern programming languages, the maximum value for an int data type is implementation-specific, but is typically in the range of 2^31 - 1 to 2^63 - 1, and the minimum value is usually -2^31 or -2^63.

In Python, you can emulate a do-while loop by using a while True loop with a break statement.

There are many Integrated Development Environments (IDEs) that you can use for writing, testing, and debugging Python code.

In Pandas, you can delete a row in a DataFrame based on a certain column value by using the drop() method and passing the index label of the row you want to delete.

You can use a for loop to iterate through the list of strings, and then use the in keyword to check if the string is a substring of the current item in the list.

You can call a function from another .py file by importing the file and then calling the function.

No, in python the built-in len() function is the preferred way to get the length of an array, list or any other iterable object.

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

The error message "JSONDecodeError: Expecting value: line 1 column 1 (char 0)" typically occurs when you are trying to parse a string as JSON, but the string is not in a valid JSON format.

Here is an example of how you might create a list of numbers between two values in python:

Here is an example of how you might convert all strings in a list of lists to integers:

In Python, you can use the os module to list all files in a directory.