我有两个如下所示的 csv 文件,我想合并它们 - 或多或少使用第一列 ID_ 作为唯一标识符,并将 AMT 列附加到最终文件中的新列。
CSV1
ID_ CUSTOMER_ID_ EMAIL_ADDRESS_
1090 1 [email protected]
1106 2 [email protected]
1145 3 [email protected]
1206 4 [email protected]
1247 5 [email protected]
1254 6 [email protected]
1260 7 [email protected]
1361 8 [email protected]
1376 9 [email protected]
CSV2
ID_ AMT
1090 5
1106 5
1145 5
1206 5
1247 5
1254 65
1260 5
1361 10
1376 5
这是我在最终文件中寻找的内容:
ID_ CUSTOMER_ID_ EMAIL_ADDRESS_ AMT
1090 1 [email protected] 5
1106 2 [email protected] 5
1145 3 [email protected] 5
1206 4 [email protected] 5
1247 5 [email protected] 5
1254 6 [email protected] 65
1260 7 [email protected] 5
1361 8 [email protected] 10
1376 9 [email protected] 5
我尝试尽可能多地修改下面的这个,但无法得到我正在寻找的东西。真的坚持这个 - 不知道我还能做什么。非常感谢任何和所有的帮助!
join -t, File1.csv File2.csv
此示例中显示的数据包含选项卡,但我的实际文件是如上所述的 CSV,并将包含逗号作为分隔符。
这可以使用 Pandas 库轻松完成。这是我执行此操作的代码:
'''
This program reads two csv files and merges them based on a common key column.
'''
# import the pandas library
# you can install using the following command: pip install pandas
import pandas as pd
# Read the files into two dataframes.
df1 = pd.read_csv('CSV1.csv')
df2 = pd.read_csv('CSV2.csv')
# Merge the two dataframes, using _ID column as key
df3 = pd.merge(df1, df2, on = 'ID_')
df3.set_index('ID_', inplace = True)
# Write it to a new CSV file
df3.to_csv('CSV3.csv')
您可以在这里找到有关 pandas 的简短教程: https://pandas.pydata.org/pandas-docs/stable/getting_started/10min.html