3 examples of 'pandas diff' in Python

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3081def _diff(self, periods, part_cols=()):
3082 if not isinstance(periods, int):
3083 raise ValueError('periods should be an int; however, got [%s]' % type(periods))
3084 window = Window.partitionBy(*part_cols).orderBy(self._internal.index_scols)\
3085 .rowsBetween(-periods, -periods)
3086 scol = self._scol - F.lag(self._scol, periods).over(window)
3087 return self._with_new_scol(scol).rename(self.name)

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1958def _diff(self, *args, **kwargs):
1959 groupkey_scols = [s._scol for s in self._groupkeys]
1960 return Series._diff(self._kser, *args, **kwargs, part_cols=groupkey_scols)
35def _get_diff_data(df, name):
36 column_names = _get_diff_column_names(name)
37 d = df[column_names].sum()
38 n = d.sum()
39 counts = np.array([d[2], d[1] + d[3], d[0] + d[4]])
40 percentages = 100. * counts / float(n)
41 return [name[:-1], n] + list(percentages)

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