It'll be up to you to find the correct balance between having a more efficient piece of code versus too much exception handling, which could cause you to miss vital errors further down the line. But when it comes to files, exception handling is a bit of a gray area. It is also predicted that according to benchmarks it is faster than other methods to match pathnames in directories. The pattern rules of glob follow standard Unix path expansion rules. In most cases, it's considered more Pythonic to avoid exception handling. In Python, the glob module is used to retrieve files/pathnames matching a specified pattern. The with statement will hold files open even if they are deleted by a concurrent process, preventing the program from crashing. This solution also helps us to avoid race conditions. It requires two interactions with the file (checking if it exists, then appending/writing), compared with just appending/writing in our exception handling solution. The exception handling solution performs the same functionality as an os solution but doesn't require a library import. This means the file doesn't exist, so we create a new one.Īs mentioned previously, in situations where you'd like to complete an operation on the file if it exists, using exception handling is the preferred approach. Python will enter the except statement if a FileNotFoundError is thrown. Python try to open the file, and if it works, append 'New Session'. As we all know there are several methods to find the files, but in this tutorial, we will learn to find the files with certain extensions using the endswith () function, comprehension method, and the several methods present in the os module and glob module.
The try-except branches are working similarly to an if-else statement.
0 kommentar(er)
