The $open()$ function in Python is used to open a file and returns a corresponding file object. It allows for various modes such as reading, writing, and appending.
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The $open()$ function requires at least one argument: the file name or path.
$open()$ can take an optional second argument that specifies the mode (e.g., 'r' for read, 'w' for write).
In read mode ('r'), if the specified file does not exist, $open()$ raises a FileNotFoundError.
Using the 'with' statement along with $open()$ ensures that files are properly closed after their suite finishes execution.
The default mode for $open()$ is 'r', which means it opens the file in read-only mode.
Review Questions
What arguments are required and optional when using the $open()$ function?
What happens if you attempt to open a non-existent file in read mode?
Why is it beneficial to use the 'with' statement when working with files?
Related terms
File Object: A file object represents an open file and provides methods to interact with it, such as reading or writing data.
File Modes: File modes specify how a file should be opened (e.g., 'r' for reading, 'w' for writing).
with Statement: The 'with' statement ensures proper acquisition and release of resources, like files, by automatically closing them after their block of code executes.