Compatible data file formats

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Well, you would have to be more accurate about WHAT you want to store if you want to know how Sage can store it. There is a very general-purpose format that Sage supports though, but it will mostly be useful if you want to send a "Sage object" to another Sage user.

sage: # Build an object containing whatever you want to store
sage: a = [1, Graph(), Matrix(2,2)]
sage: save(a,"/tmp/my_sage_object.sobj")
sage: load("/tmp/my_sage_object.sobj")
[
                        [0 0]
1, Graph on 0 vertices, [0 0]
]
sage: one,my_graph,my_matrix = load("/tmp/my_sage_object.sobj")

That's a pretty cool feature if you want to store an object.

But if what you had in mind is "how can I exchange data with other persons or load their files", then you have to be much more specific.

Nathann

Note that open() is a Python function that can open any kind of file. The main issue is then to handle your file so that the data can be used in Sage (i.e. transformed into Sage objects).

Since Sage is written in Python, there are many modules to handle many particular types of file (e.g. if you want to handle an xml file, you can imort and use the xml module, if you want to handle a gpg file, you can install, import and use the gnupg module, and so on). If your file is an ad-hoc (non-standard) text file, you can use various python tools to get interesting data from it (e.g. use the string methods, consider also the re module allows you to filter your file with regular expressions).

So this really depends on your situation. The data from which sotware do you want to deal with ? Which formats does it allow to export ?