What is exactly a file-like object in Python?

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From the glossary:

file-like object

A synonym for file object

and a file object is

file object

An object exposing a file-oriented API (with methods such
as read() or write()) to an underlying resource. Depending on the way
it was created, a file object can mediate access to a real on-disk
file or to another type of storage or communication device (for
example standard input/output, in-memory buffers, sockets, pipes,
etc.). File objects are also called file-like objects or streams.

There are actually three categories of file objects: raw binary files,
buffered binary files and text files. Their interfaces are defined in
the io module. The canonical way to create a file object is by using
the open() function.

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