如何将县名转换为FIPS代码? (将县名映射到他们的fip) [英] How do I convert county names to fips codes? (map county names to their fips)

问题描述

我有一张表，其中一列是县名，另一列是各种属性.

I have a table where one column are the county names and the other columns are various attributes.

我想将这一列的县名转换为fips代码.

I want to convert this column of county names to fips codes.

我有一个中间表，其中显示了每个县的fips代码.

I have an intermediary table that shows the fips code for each county.

以下是我拥有的数据(初始和中间)和我想要的数据(最终)的示例.

Here is an example of what data i have (initial, and intermediate) and the data i want (final).

initial_df = {
    'county': ['REAGAN', 'UPTON', 'HARDEMAN', 'UPTON'], 
    'values': [508, 364, 26, 870]
}
intermediate_df = {
    'county': ['REAGAN', 'HARDEMAN', 'UPTON'], 
    'fips': [48383, 47069, 48461]
}
final_df = {
    'county': ['REAGAN', 'UPTON', 'HARDEMAN', 'UPTON'], 
    'fips': [48383, 48461, 47069, 48461], 
    'values': [508, 364, 26, 870]
}

推荐答案

您可以使用合并".

import pandas as pd
initial_df = {'county': ['REAGAN', 'UPTON', 'HARDEMAN', 'UPTON'], 'values': [508, 
364, 26, 870]}
intermediate_df = {'county': ['REAGAN', 'HARDEMAN', 'UPTON'], 'fips': [48383, 47069, 
48461]}
final_df = {'county': ['REAGAN', 'UPTON', 'HARDEMAN', 'UPTON'], 'fips': [48383, 
48461, 47069, 48461], 'values': [508, 364, 26, 870]}
df1=pd.DataFrame(initial_df)
df2=pd.DataFrame(intermediate_df)
df3=df1.merge(df2)
print(df3)

，输出为您的final_df.

and the output is your final_df.

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