What's the use of the filename parameter of ast.parse?

abstract-syntax-tree, python

Solution

It sets the `co_filename` attribute on the code object, which is used to display the filename in tracebacks. Besides that, it's not really significant what value you pass.

>>> c = compile('raise Exception("spam")', 'eggs', 'exec')
>>> eval(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "eggs", line 1, in <module>
Exception: spam

Problem

The documentation reads: ``` ast.parse(source, filename='<unknown>', mode='exec') Equivalent to compile(source, filename, mode, ast.PyCF_ONLY_AST). compile(source, filename, mode[, flags[, dont_inherit]]) The filename argument should give the file from which the code was read; pass some recognizable value if it wasn’t read from a file ('<string>' is commonly used). ``` But it doesn't tell me much how to get this filename back from the AST node. Or how is this filename parameter is used. Is it just a stub?

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