Function linenumbers

django/template/defaultfilters.py:232–244

Display text with line numbers.

(value, autoescape=True)

@register.filter(is_safe=True, needs_autoescape=True)
@stringfilter
def linenumbers(value, autoescape=True):
    """Display text with line numbers."""
    lines = value.split("\n")
    # Find the maximum width of the line count, for use with zero padding
    # string format command
    width = str(len(str(len(lines))))
    if not autoescape or isinstance(value, SafeData):
        for i, line in enumerate(lines):
            lines[i] = ("%0" + width + "d. %s") % (i + 1, line)
    else:
        for i, line in enumerate(lines):
            lines[i] = ("%0" + width + "d. %s") % (i + 1, escape(line))
    return mark_safe("\n".join(lines))


@register.filter(is_safe=True)