elasticsearch7.9.3导出索引数据为csv出现异常unsupported operand type(s) for -: 'dict' and 'int'

[liqunlin]

从elasticsearch7.9.3导出索引数据为csv，出现异常，报错如下，挺好的工具，啥时更新支持es7.x、es8.x？
Found {u'relation': u'eq', u'value': 1032} results.
Traceback (most recent call last):
File "/usr/bin/es2csv", line 9, in
load_entry_point('es2csv==5.5.2', 'console_scripts', 'es2csv')()
File "/usr/lib/python2.7/site-packages/es2csv_cli.py", line 53, in main
es.search_query()
File "/usr/lib/python2.7/site-packages/es2csv.py", line 26, in f_retry
return f(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/es2csv.py", line 148, in search_query
bar = progressbar.ProgressBar(widgets=widgets, maxval=self.num_results).start()
File "/usr/lib/python2.7/site-packages/progressbar/bar.py", line 633, in start
self.update(self.min_value, force=True)
File "/usr/lib/python2.7/site-packages/progressbar/bar.py", line 579, in update
StdRedirectMixin.update(self, value=value)
File "/usr/lib/python2.7/site-packages/progressbar/bar.py", line 141, in update
DefaultFdMixin.update(self, value=value)
File "/usr/lib/python2.7/site-packages/progressbar/bar.py", line 68, in update
line = converters.to_unicode('\r' + self._format_line())
File "/usr/lib/python2.7/site-packages/progressbar/bar.py", line 508, in _format_line
widgets = ''.join(self._to_unicode(self._format_widgets()))
File "/usr/lib/python2.7/site-packages/progressbar/bar.py", line 473, in _format_widgets
data = self.data()
File "/usr/lib/python2.7/site-packages/progressbar/bar.py", line 401, in data
percentage=self.percentage,
File "/usr/lib/python2.7/site-packages/progressbar/bar.py", line 320, in percentage
total = self.max_value - self.min_value
TypeError: unsupported operand type(s) for -: 'dict' and 'int'