python pandas merge two dataframes code example
Example 1: combining 2 dataframes pandas
df_3 = pd.concat([df_1, df_2])
Example 2: pandas merge multiple dataframes
import pandas as pd
from functools import reduce
data_frames = [df1, df2, df3]
df_merged = reduce(lambda left,right: pd.merge(left,right,on=['key_col'],
how='outer'), data_frames)
Example 3: how to merge two pandas dataframes on a column
import pandas as pd
T1 = pd.merge(T1, T2, on=T1.index, how='outer')
Example 4: python dataframe left join
>>> left.merge(right, on='user_id', how='left')
Example 5: dataframe concatenate
df['col1 & col2'] = df['col1']+df['col2']
Example 6: how to merge two column pandas
DataFrame["new_column"] = DataFrame["column1"] + DataFrame["column2"]