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combine dataframes Code Example
pandas left join 
df.merge(df2, left_on = "doc_id", right_on = "doc_num", how = "left")
combining 2 dataframes pandas 
df_3 = pd.concat([df_1, df_2])
combine two dataframe in pandas 
# Stack the DataFrames on top of each other
vertical_stack = pd.concat([survey_sub, survey_sub_last10], axis=0)

# Place the DataFrames side by side
horizontal_stack = pd.concat([survey_sub, survey_sub_last10], axis=1)
Source: datacarpentry.org
combine dataframes 
frames = [df1, df2, df3]
result = pd.concat(frames)

# sorted indices

result = pd.concat([ret, items], ignore_index = True, axis = 0)
Source: www.codegrepper.com
concatenating datfra,esin pandas 
In [8]: df4 = pd.DataFrame({'B': ['B2', 'B3', 'B6', 'B7'],
   ...:                     'D': ['D2', 'D3', 'D6', 'D7'],
   ...:                     'F': ['F2', 'F3', 'F6', 'F7']},
   ...:                    index=[2, 3, 6, 7])
   ...: 

In [9]: result = pd.concat([df1, df4], axis=1, sort=False)
Source: pandas.pydata.org



Python

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