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Humanize lists of strings in templates

Author:
ChipX86
Posted:
June 10, 2007
Language:
Python
Version:
.96
Score:
2 (after 2 ratings)

A simple template filter for taking a list and humanizing it, converting:

["foo", "bar"] to "foo and bar"

["foo", "bar", "baz"] to "foo, bar and baz"

["foo", "bar", "baz", "42"] to "foo, bar, baz and 42"

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@register.filter
def humanize_list(value):
    if len(value) == 0:
        return ""
    elif len(value) == 1:
        return value[0]

    s = ", ".join(value[:-1])

    if len(value) > 3:
        s += ","

    return "%s and %s" % (s, value[-1])

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