How-to articles, tricks, and solutions about PYTHON

There are a few different ways to make a copy of a list in Python:

There are a few ways to concatenate lists in Python.

To connect to a MySQL database in Python, you can use the mysql-connector-python library.

You can use the date() function from the datetime module in Python to convert a datetime object to just a date object.

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

You can use the isna() function to create a boolean mask of the NaN values in a column, and then use the sum() function to count the number of True values in the mask.

There are a few ways you can count the occurrences of a list item 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.

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

In Python, you can create a multiline comment using triple quotes (either single or double) at the beginning and end of the comment.

In Python, you can use the built-in callable() function to check if a variable is a function.

You can use the sys.getsizeof() function to determine the size of an object in bytes.

You can convert both strings to lowercase or uppercase (using the lower() or upper() method) before doing the comparison.

You can use the exclude() method to filter out records where a certain field is not equal to a certain value.

There are several ways to execute a program or call a system command in Python.

You can expand the output display of a Pandas DataFrame by setting the option 'display.max_columns' in pandas.

You can use the sys module in Python to access the sys.path variable, which contains a list of directories that Python looks in for modules to import.

In Python, one way to find duplicates in a list and create another list with them is to use a for loop and an if statement.

You can use the site module to find the location of your Python site-packages directory.

You can use the itertools.permutations() function to generate all permutations of a list in Python.

You can use the pip module to get a list of locally installed Python modules.

To get a substring of a string in Python, you can use the string[start:end] notation.

There are a few ways to get the file creation and modification date/times, depending on the programming language and operating system you are using.

You can use the time module in Python to get the current time in milliseconds.

To get the current time in Python, you can use the datetime module from the standard library.