3 examples of 'pandas combine rows with same column value' in Python

813
def merge(old_cols, new_cols):
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    return old_cols + new_cols

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def combine(self, obsra, inplace=True):
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    """
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    concatenates a new obsra onto the end of the current one.
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    """
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    newobsra = pd.concat([self.obsra, obsra])
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    if inplace: self.obsra = newobsra
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    return newobsra

2302
def _combine_check(self, other):
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    """
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    Check if self and other refer to the same table and if all columns in
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    self and other are numeric. This sanity check is used before performing
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    aggregation operations between IdaDataFrame/IdaSeries.
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    """
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    def check_numeric_columns(idaobject):
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        not_valid = []
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        numeric_columns = idaobject._get_numerical_columns()
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        for column in idaobject.columns:
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            if column not in numeric_columns:
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                not_valid.append(column)
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        if not_valid:
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            raise TypeError("Arithmetic operation are not defined for %s"%not_valid)
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    if isinstance(other, IdaDataFrame) | isinstance(other, ibmdbpy.IdaSeries):
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        if self._name != other._name:
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            raise IdaDataFrameError("It is not possible to aggregate columns using columns of a different table.")
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    if not(isinstance(other, IdaDataFrame) | isinstance(other, ibmdbpy.IdaSeries) | isinstance(other, Number)):
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        if other is not None:
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            raise TypeError("Aggregation makes only sense with numbers, "+
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                            "or IdaDataFrames refering to the same table.")
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    check_numeric_columns(self)
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    if isinstance(other, ibmdbpy.IdaSeries)|isinstance(other, IdaDataFrame):
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        check_numeric_columns(other)