Working with files and exceptions in Python

Python is a popular programming language for data analysis, web development, and other applications. It has built-in functions for file handling, making it easy to read, write, and modify files. However, working with files can also cause errors, such as file not found, file read errors, or permission errors. To handle such errors, Python provides an exception handling mechanism.

Working with Files in Python

Python has several functions for file handling, including opening, reading, writing, and closing files. Here are the commonly used functions:

Opening a file

To open a file, use the built-in function open(). This function takes two arguments: the file name and the mode. The mode can be 'r' for reading, 'w' for writing, or 'a' for appending.

Reading from a file

To read from a file, use the read() function. This function reads the entire contents of the file.

Writing to a file

To write to a file, use the write() function. This function writes the specified string to the file. If you're looking for training in react native, then you can check out our react native course in Bangalore.

Closing a file

To close a file, use the close() function. This function releases the resources associated with the file.

Exceptions in Python

An exception is an event that occurs during the execution of a program that disrupts the normal flow of the program's instructions. Python provides a mechanism to handle exceptions using the try-except block.

The try block

The try block contains the code that may cause an exception. If an exception occurs, the code execution is interrupted and control is transferred to the except block.

The except block

The except block is where you handle the exception. You can specify the type of exception to handle using the except clause. For example, you can use the IOError exception to handle file errors. If you're looking for training in react native, then you can check out our Python course in Bangalore.

Conclusion

In conclusion, working with files and exceptions in Python is essential for any programmer who wants to write robust and error-free code. Python's built-in functions for file handling and exception handling make it easy to work with files while providing a mechanism to handle errors that may arise. With the right skills and tools, you can become a master at file handling and exception handling in Python.