4 examples of 'pandas combine_first' in Python

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29def _concat(df, type):
30 if df is None:
31 df = pd.DataFrame(_object_blocks[type])
32 else:
33 _df = pd.DataFrame(_object_blocks[type])
34 df = pd.concat([df, _df], sort=True)
35 return df
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2413def combine_first(self, other):
2414 """Combine two Datasets, default to data_vars of self.
2415
2416 The new coordinates follow the normal broadcasting and alignment rules
2417 of ``join='outer'``. Vacant cells in the expanded coordinates are
2418 filled with np.nan.
2419
2420 Parameters
2421 ----------
2422 other : DataArray
2423 Used to fill all matching missing values in this array.
2424
2425 Returns
2426 -------
2427 DataArray
2428 """
2429 out = ops.fillna(self, other, join="outer", dataset_join="outer")
2430 return out
184def combine(self, obsra, inplace=True):
185 """
186 concatenates a new obsra onto the end of the current one.
187 """
188 newobsra = pd.concat([self.obsra, obsra])
189 if inplace: self.obsra = newobsra
190 return newobsra
142def append_data(df1, df2):
143 '''
144 Append df2 to df1
145 '''
146 df = pd.concat((df1, df2))
147 return df.groupby(df.index).first()

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