persistent: Pertaining to a program that runs indefinitely and keeps at least some of its data in permanent storage.
format operator: An operator, %, that takes a format string and a tuple and generates a string that includes the elements of the tuple formatted as specified by the format string.
format string: A string, used with the format operator, that contains format sequences.
format sequence: A sequence of characters in a format string, like %d, that specifies how a value should be formatted.
text file: A sequence of characters stored in permanent storage like a hard drive.
directory: A named collection of files, also called a folder.
path: A string that identifies a file.
relative path: A path that starts from the current directory.
absolute path: A path that starts from the topmost directory in the file system.
catch: To prevent an exception from terminating a program using the try and except statements.
database: A file whose contents are organized like a dictionary with keys that correspond to values.
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