从csv文件创建字典?

我试图从一个csv文件创建一个字典。csv文件的第一列包含唯一的键，第二列包含值。csv文件的每一行都表示字典中的唯一键、值对。我尝试使用csv文件。DictReader和csv。类的DictWriter，但我只知道如何为每一行生成一个新字典。我想要一本字典。这是我试图使用的代码:

import csv

with open('coors.csv', mode='r') as infile:
    reader = csv.reader(infile)
    with open('coors_new.csv', mode='w') as outfile:
    writer = csv.writer(outfile)
    for rows in reader:
        k = rows[0]
        v = rows[1]
        mydict = {k:v for k, v in rows}
    print(mydict)

当我运行上面的代码时，我得到一个ValueError:太多的值来解包(预期2)。我如何从csv文件创建一个字典?谢谢。

当前回答

我建议添加if行，以防文件末尾有空行

import csv
with open('coors.csv', mode='r') as infile:
    reader = csv.reader(infile)
    with open('coors_new.csv', mode='w') as outfile:
        writer = csv.writer(outfile)
        mydict = dict(row[:2] for row in reader if row)

2011-07-19 01:21:11

其他回答

import csv
reader = csv.reader(open('filename.csv', 'r'))
d = {}
for row in reader:
   k, v = row
   d[k] = v

2011-07-19 00:15:28

你只需要转换csv。读者dict:

~ >> cat > 1.csv
key1, value1
key2, value2
key2, value22
key3, value3

~ >> cat > d.py
import csv
with open('1.csv') as f:
    d = dict(filter(None, csv.reader(f)))

print(d)

~ >> python d.py
{'key3': ' value3', 'key2': ' value22', 'key1': ' value1'}

2011-07-19 00:41:27

这不是优雅的，而是使用熊猫的一行解决方案。

import pandas as pd
pd.read_csv('coors.csv', header=None, index_col=0, squeeze=True).to_dict()

如果你想为你的索引指定dtype(如果你使用index_col参数，它不能在read_csv中指定，因为有一个bug):

import pandas as pd
pd.read_csv('coors.csv', header=None, dtype={0: str}).set_index(0).squeeze().to_dict()

2017-12-06 06:31:45

你可以用这个，它很酷:

import dataconverters.commas as commas
filename = 'test.csv'
with open(filename) as f:
      records, metadata = commas.parse(f)
      for row in records:
            print 'this is row in dictionary:'+rowenter code here

2015-02-10 18:43:17

我建议添加if行，以防文件末尾有空行

import csv
with open('coors.csv', mode='r') as infile:
    reader = csv.reader(infile)
    with open('coors_new.csv', mode='w') as outfile:
        writer = csv.writer(outfile)
        mydict = dict(row[:2] for row in reader if row)

2011-07-19 01:21:11

从csv文件创建字典?

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