What is the primary function of the open() method in Python?

The open() method in Python serves the essential function of opening a file for reading or writing. When utilizing this method, you can specify the mode in which the file should be opened, such as reading ('r'), writing ('w'), or appending ('a'). This versatility allows developers to interact with files effectively, enabling them to read data from files or write data to files, depending on the requirements of their programs.

For example, if you want to read the contents of a text file, you would open it in read mode. Conversely, if you're saving changes or creating new data entries, you would use write mode. The method not only facilitates data access but also supports various operations and file types, making it a fundamental aspect of file handling in Python programming.