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how to merge more than 2 dataframes in python

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Lively Lyrebird answered on August 27, 2020 Popularity 10/10 Helpfulness 5/10

answer how to merge more than 2 dataframes in python

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how to merge more than 2 dataframes in python

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df = pd.concat( [df1,df2,df3], ignore_index=True )

Popularity 10/10 Helpfulness 5/10 Language python

Source: Grepper

Tags: merge python

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Contributed on Sep 23 2021

Lively Lyrebird

0 Answers Avg Quality 2/10

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pandas merge multiple dataframes

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import pandas as pd
from functools import reduce

# compile the list of dataframes you want to merge
data_frames = [df1, df2, df3]
df_merged = reduce(lambda  left,right: pd.merge(left,right,on=['key_col'],
                                            how='outer'), data_frames)

Popularity 10/10 Helpfulness 6/10 Language python

Source: stackoverflow.com

Tags: pandas-merge pandas-mer

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Contributed on Oct 04 2020

Tinky Winky

0 Answers Avg Quality 2/10

how to merge two dataframes

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df_merge_col = pd.merge(df_row, df3, on='id')

df_merge_col

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Source: Grepper

Tags: merge merg

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Contributed on Aug 27 2020

Lovely Leopard

0 Answers Avg Quality 2/10

Merge multiple dataframs

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# compile the list of dataframes you want to merge
data_frames = [df1, df2, df3]

df_merged = reduce(lambda  left,right: pd.merge(left,right,on=['DATE'],
                                            how='outer'), data_frames)

# if you want to fill the values that don't exist in the lines of merged dataframe simply fill with required strings as

df_merged = reduce(lambda  left,right: pd.merge(left,right,on=['DATE'],
                                            how='outer'), data_frames).fillna('void')

Popularity 9/10 Helpfulness 4/10 Language python

Source: stackoverflow.com

Tags: merge merg

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Contributed on Sep 02 2021

Terrible Turtle

0 Answers Avg Quality 2/10

merge 2 dataframes in python

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df_cd = pd.merge(df_SN7577i_c, df_SN7577i_d, how='inner', left_on = 'Id', right_on = 'Id')

Popularity 10/10 Helpfulness 4/10 Language python

Source: datacarpentry.org

Tags: merge merg

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Contributed on Feb 04 2022

Encouraging Elephant

0 Answers Avg Quality 2/10

Merge multiple dataframs

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from functools import reduce

Name of a column in all dataframes is 'DATE'

df_merged = reduce(lambda  left,right: pd.merge(left,right,on=['DATE'],
                                            how='outer'), data_frames)

# if you want to fill the values that don't exist in the lines of merged dataframe simply fill with required strings as

df_merged = reduce(lambda  left,right: pd.merge(left,right,on=['DATE'],
                                            how='outer'), data_frames).fillna('void')

Popularity 9/10 Helpfulness 3/10 Language python

Source: stackoverflow.com

Tags: merge merg

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Contributed on Sep 02 2021

Terrible Turtle

0 Answers Avg Quality 2/10

Merge multiple dataframs

Comment

-1

from functools import reduce
import pandas as pd

dfs = [df1, df2, df3, ...]
nan_value = 0

# solution 1 (fast)
result_1 = pd.concat(dfs, join='outer', axis=1).fillna(nan_value)

# solution 2
result_2 = reduce(lambda df_left,df_right: pd.merge(df_left, df_right, 
                                              left_index=True, right_index=True, 
                                              how='outer'), 
                  dfs).fillna(nan_value)

Popularity 9/10 Helpfulness 2/10 Language python

Source: stackoverflow.com

Tags: merge merg

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Contributed on Sep 02 2021

Terrible Turtle

0 Answers Avg Quality 2/10

merge more than two dataframes based on column

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df_2017.merge(df_2018, left_on = 'Textbook?', right_on = 'Textbook?', how = 'inner', suffixes = ('_2017', '_2018'))\
.merge(df_2019, left_on = 'Textbook?', right_on = 'Textbook?', how = 'inner')\
.merge(df_2020, left_on = 'Textbook?', right_on = 'Textbook?', how = 'inner', suffixes = ('_2019', '_2020'))\
.merge(df_2021, left_on = 'Textbook?', right_on = 'Textbook?', how = 'inner')\
.merge(df_2022, left_on = 'Textbook?', right_on = 'Textbook?', how = 'inner', suffixes = ('_2021', '_2022'))\

Popularity 1/10 Helpfulness 1/10 Language python

Source: Grepper

Tags: merge python

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Contributed on Apr 01 2022

Sumaia Parveen Shupti

0 Answers Avg Quality 2/10

Merge multiple dataframs

Comment

-1

df_merged = reduce(lambda  left,right: pd.merge(left,right,on=['DATE'],
                                            how='outer'), data_frames)

# if you want to fill the values that don't exist in the lines of merged dataframe simply fill with required strings as

df_merged = reduce(lambda  left,right: pd.merge(left,right,on=['DATE'],
                                            how='outer'), data_frames).fillna('void')

Popularity 9/10 Helpfulness 1/10 Language python

Source: stackoverflow.com

Tags: merge merg

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Contributed on Sep 02 2021

Terrible Turtle

0 Answers Avg Quality 2/10

how to merge more than 2 dataframes in python

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how to merge more than 2 dataframes in python

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pandas merge multiple dataframes

how to merge two dataframes

Merge multiple dataframs

merge 2 dataframes in python

Merge multiple dataframs

Merge multiple dataframs

merge more than two dataframes based on column

Merge multiple dataframs

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