Python csv(两列: key/value) to Dictionary

Question

是否可以将 csv 文件中的数据读入字典，第一列是键，第二列是键。

例如我有一个 csv 文件

code    msg
123456  Lorem ipsum dolor sit amet, consectetur adipiscing elit
345981  sed do eiusmo ut labore, et dolore magna aliqua;
459827  ullamco, laboris nisi ut aliquip ex ea commodo consequat.
490023  veniam, quis nostrud exercitation
345612  mollit anim id est laborum.

code 代表键，msg 代表与每个代码关联的值。

import csv
with open('test.csv') as f:
        reader = csv.reader(f)
        mydict = {rows[0]:rows[1:] for rows in reader}
        print(mydict)
x = mydict.get("123456")
print(x)

结果:

{'code;msg': [], '123456;Lorem ipsum dolor sit amet': [' consectetur adipiscing elit'], '345981;"sed do eiusmo ut labore': [' et dolore magna aliqua;"'], '459827;ullamco': [' laboris nisi ut aliquip ex ea commodo consequat.'], '490023;veniam': [' quis nostrud exercitation'], '345612;mollit anim id est laborum.': []}
None

我想搜索与每个键关联的值。

EG:当我写的时候:

key= "123456"
value=mydict.get(key)
print(key + "has this value : " + value)

我会得到这样的输出:

>>> The key 123456 has this value :Lorem ipsum dolor sit amet, consectetur adipiscing elit

Answer 1

无需任何导入，您可以使用:

with open('test.csv') as f:
    csv = f.readlines()

d = {}
for line in csv[1:]:  # Loop csv lines skipping first line csv[1:] (headers) 
    m = line.split()
    if len(m) > 1:
        d[m[0]] = " ".join(m[1:])
print(d)

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输出:

{'123456': 'Lorem ipsum dolor sit amet, consectetur adipiscing elit', '345981': 'sed do eiusmo ut labore, et dolore magna aliqua;', '459827': 'ullamco, laboris nisi ut aliquip ex ea commodo consequat.', '490023': 'veniam, quis nostrud exercitation', '345612': 'mollit anim id est laborum.'}

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Python Demo

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注意事项:

1. 要按键搜索，我通常使用:

   if '123456' in d:
       print(d['123456'])
       # Lorem ipsum dolor sit amet, consectetur adipiscing elit
   

2. 打印字典键和值

   print(d.keys(), d.values())
   # dict_keys(['123456', '345981', '459827', '490023', '345612'])
   # dict_values(['Lorem ipsum dolor sit amet, consectetur adipiscing elit', 'sed do eiusmo ut labore, et dolore magna  aliqua;', 'ullamco, laboris nisi ut aliquip ex ea commodo consequat.', 'veniam, quis nostrud exercitation', 'mollit anim id est laborum.'])