The easiest way to sort letters is to use the join and sorted functions together.

There are two methods in Python that can add an element to a list: append and extend. These methods can cause a lot of confusion among beginner Python programmers.

If you work with dictionaries, sometimes, you will have to check whether a dictionary is empty.

In Python, you can add dictionary keys to a list. This can be achieved with the keys function of a dictionary.

To import the current date (year, month, day) and time (hour, minute, second), you have to import the datetime module.

Contrary to other programming languages, such as C++ or Java, you don’t specify the data type when defining a variable in Python, but it doesn’t mean that the variable doesn’t have a type.

You can check the variable type using the type function that returns the type of data.

If you add a dictionary to a list in Python, it won’t create a copy of this dictionary, but rather add a reference to the dictionary.

If you create a variable, you can easily convert it to a string using the print function.

sys.maxint is the maximum value for the int variable in Python 2.

Python 3 doesn’t use this property because the int type in Python 3 has no limit. For Python 3, you can use sys.maxsize to check the maximum size lists, strings, dicts, and many other containers can have.

If you want to create an empty array (or list because there are no arrays in Python), you can use this line of code: