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You can open files in Python using the built-in open() function, specifying the file name and access mode. Access modes determine whether you read, write, or append to the file, and whether it’s in text or binary format.
Opening a File for Reading
Ensure the file exists in the same directory as your Python script or provide its full path.
Use open("filename.txt") to open the file in default read mode.
Call .read() on the file object to get its contents.
Close the file using .close() after reading.
Opening a File for Writing
Use open("filename.txt", "w") to open the file in write mode.
Write data using .write("your text").
Close the file with .close() to save changes.
Opening a File for Appending
Use open("filename.txt", "a") to open the file in append mode.
Add new content with .write("additional text").
Close the file after writing.
Reading Line by Line
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