3 examples of 'pandas sum' in Python

89
def SUM(Series, N):
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    return pd.Series.rolling(Series, N).sum()

54
def sum(self):
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    def sum(scol):
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        return F.when(
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            F.row_number().over(self._unbounded_window) >= self._min_periods,
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            F.sum(scol).over(self._window)
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        ).otherwise(F.lit(None))
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    return self._apply_as_series_or_frame(sum)

103
def SUM(df, n, price='Close'):
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    """
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    Summation
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    """
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    sum_list = []
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    i = 0
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    while i < len(df[price]):
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        if i + 1 < n:
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            SUM = float('NaN')
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        else:
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            start = i + 1 - n
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            end = i + 1
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            SUM = sum(df[price][start:end])
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        sum_list.append(SUM)
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        i += 1
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    return sum_list