Concatenation
Great! You've learned different ways of joining columns. Can we join two dataframes by rows? Surely, we can.
To join two dataframe, use the .concat()
method of pandas
, passing list of dataframes you want to join as the parameter. To perform this operation, both dataframes must have the same column names. Let's use splitted into two parts one of the dataframes used before and perform rows joining.
Note that
.concat()
is method ofpandas
, unlike the.merge()
method. So you need to usepd.concat()
.
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# Importing library
import pandas as pd
# Loading data
data1 = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/f2947b09-5f0d-4ad9-992f-ec0b87cd4b3f/section5/data_concat_1.csv')
data2 = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/f2947b09-5f0d-4ad9-992f-ec0b87cd4b3f/section5/data_concat_2.csv')
# Perform a left join
df_res = pd.concat([data1, data2])
print(df_res)
12345678910# Importing library import pandas as pd # Loading data data1 = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/f2947b09-5f0d-4ad9-992f-ec0b87cd4b3f/section5/data_concat_1.csv') data2 = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/f2947b09-5f0d-4ad9-992f-ec0b87cd4b3f/section5/data_concat_2.csv') # Perform a left join df_res = pd.concat([data1, data2]) print(df_res)
Tudo estava claro?
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