5.3.5.2 expr="..." attribute
Description: expr=
Keywords: albatross

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5.3.5.2 `expr="..."` attribute

This attribute must the specified. It contains an expression that is evaluated when the template is executed and the result is written as a string to the output.

For example:

    >>> import albatross
    >>> ctx = albatross.SimpleContext('.')
    >>> albatross.Template(ctx, '<magic>', '''
    ... hash('spam') is <al-value expr="hash('spam')" whitespace>
    ... ''').to_html(ctx)
    >>> ctx.flush_content()
    hash('spam') is 1626740519