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#10 Python Directory And File Management System

A dictionary is an unordered and mutable Python container that stores mappings of unique keys to values. Dictionaries are written with curly brackets ({}), including key-value pairs separated by commas (,). A colon (:) separates each key from its value. Python too supports file handling and allows users to handle files i.e., to read and write files, along with many other file handling options, to operate on files. The concept of file handling has stretched over various other languages, but the implementation is either complicated or lengthy, but like other concepts of Python, this concept here is also easy and short. Python treats file differently as text or binary and this is important. Each line of code includes a sequence of characters and they form text file. Each line of a file is terminated with a special character, called the EOL or End of Line characters like comma {,} or newline character. It ends the current line and tells the interpreter a new one has begun. Let’s start with Reading and Writing files. Where the following mode is supported: r: open an existing file for a read operation. w: open an existing file for a write operation. If the file already contains some data then it will be overridden. a: open an existing file for append operation. It won’t override existing data. r+: To read and write data into the file. The previous data in the file will not be deleted. w+: To write and read data. It will override existing data. a+: To append and read data from the file. It won’t override existing data.