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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def generate_docstr(element, indent='', wrap=None):
 """ Generate a Python docstr for a given element in the AMQP XML spec file. The element could be a class or method The 'wrap' parameter is an optional chunk of text that's added to the beginning and end of the resulting docstring. """

    result = []

    txt = element.text and element.text.rstrip()
    if txt:
        result.append(_reindent(txt, indent))
        result.append(indent)

    for d in element.findall('doc') + element.findall('rule'):
        docval = ''.join(d.textlist()).rstrip()
        if not docval:
            continue
        reformat = True
        if 'name' in d.attrib:
            result.append(indent + d.attrib['name'].upper() + ':')
            result.append(indent)
            extra_indent = '    '
            if d.attrib['name'] == 'grammar':
                reformat = False # Don't want re-indenting to mess this up
        elif d.tag == 'rule':
            result.append(indent + 'RULE:')
            result.append(indent)
            extra_indent = '    '
        else:
            extra_indent = ''
        result.append(_reindent(docval, indent + extra_indent, reformat))
        result.append(indent)

    fields = element.findall('field')
    if fields:
        result.append(indent + 'PARAMETERS:')
        for f in fields:
            result.append(indent + '    ' + _fixup_field_name(f) + ': ' + _field_type(f))
            field_docs = generate_docstr(f, indent + '        ')
            if field_docs:
                result.append(indent)
                result.append(field_docs)
            result.append(indent)

    if not result:
        return None

    if wrap is not None:
        result = [wrap] + result + [wrap]

    return '\n'.join(x.rstrip() for x in result) + '\n'