python merge dataframes code example
Example 1: join on column pandas
df1.merge(df2,on='columnName',how='left')
Example 2: combining 2 dataframes pandas
df_3 = pd.concat([df_1, df_2])
Example 3: pandas merge python
import pandas as pd
df1 = pd.DataFrame({'lkey': ['foo', 'bar', 'baz', 'foo'],
'value': [1, 2, 3, 5]})
df2 = pd.DataFrame({'rkey': ['foo', 'bar', 'baz', 'foo'],
'value': [5, 6, 7, 8]})
df1.merge(df2, left_on='lkey', right_on='rkey')
Example 4: combine two dataframe in pandas
vertical_stack = pd.concat([survey_sub, survey_sub_last10], axis=0)
horizontal_stack = pd.concat([survey_sub, survey_sub_last10], axis=1)
Example 5: how to merge two dataframes
df_merge_col = pd.merge(df_row, df3, on='id')
df_merge_col
Example 6: merge dataframe pandas
>>> df1.merge(df2, left_on='lkey', right_on='rkey')
lkey value_x rkey value_y
0 foo 1 foo 5
1 foo 1 foo 8
2 foo 5 foo 5
3 foo 5 foo 8
4 bar 2 bar 6
5 baz 3 baz 7