concat columns pandas code example
Example 1: concat 3 column in pandas
In[17]:df['combined']=df['bar'].astype(str)+'_'+df['foo']+'_'+df['new']
In[17]:df
Out[18]:
bar foo new combined
0 1 a apple 1_a_apple
1 2 b banana 2_b_banana
2 3 c pear 3_c_pear
Example 2: how to concat on the basis of particular columns in pandas
In [6]: result = pd.concat(frames, keys=['x', 'y', 'z'])
Example 3: concat pandas python
>>> s1 = pd.Series(['a', 'b'])
>>> s2 = pd.Series(['c', 'd'])
>>> pd.concat([s1, s2])
0 a
1 b
0 c
1 d
dtype: object
Example 4: pandas concat and reset index
train_df = pd.concat(train_class_df_list, ignore_index=True)
Example 5: dataframe concatenate
df['col1 & col2'] = df['col1']+df['col2']