Question

我有一个csv文件

col1, col2, col3
1, 2, 3
4, 5, 6

我想从这个csv创建一个字典列表。

输出为：

a= [{'col1':1, 'col2':2, 'col3':3}, {'col1':4, 'col2':5, 'col3':6}]

我该怎么做？

Answer 1

使用csv.DictReader：

>>> import csv
>>>
>>> with open('test.csv') as f:
...     a = [{k: int(v) for k, v in row.items()}
...          for row in csv.DictReader(f, skipinitialspace=True)]
...
>>> a
[{'col2': 2, 'col3': 3, 'col1': 1}, {'col2': 5, 'col3': 6, 'col1': 4}]

Answer 2

使用csv模块和列表理解：

import csv
with open('foo.csv') as f:
    reader = csv.reader(f, skipinitialspace=True)
    header = next(reader)
    a = [dict(zip(header, map(int, row))) for row in reader]
print a

<强>输出：

[{'col3': 3, 'col2': 2, 'col1': 1}, {'col3': 6, 'col2': 5, 'col1': 4}]

Answer 3

另一个更简单的答案：

    import csv
    with open("configure_column_mapping_logic.csv", "r") as f:
        reader = csv.DictReader(f)
        a = list(reader)
        print a

Answer 4

嗯，虽然其他人以聪明的方式做这件事，但我天真地实施了它。我想我的方法的好处是不需要任何外部模块，尽管它可能会因奇怪的值配置而失败。这里仅供参考：

a = []
with open("csv.txt") as myfile:
    firstline = True
    for line in myfile:
        if firstline:
            mykeys = "".join(line.split()).split(',')
            firstline = False
        else:
            values = "".join(line.split()).split(',')
            a.append({mykeys[n]:values[n] for n in range(0,len(mykeys))})

Answer 5

# similar solution via namedtuple:    

import csv
from collections import namedtuple

with open('foo.csv') as f:
  fh = csv.reader(open(f, "rU"), delimiter=',', dialect=csv.excel_tab)
  headers = fh.next()
  Row = namedtuple('Row', headers)
  list_of_dicts = [Row._make(i)._asdict() for i in fh]

Answer 6

将CSV解析为词典列表的简单方法

with open('/home/mitul/Desktop/OPENEBS/test.csv', 'rb') as infile:
  header = infile.readline().split(",")
  for line in infile:
    fields = line.split(",")
    entry = {}
    for i,value in enumerate(fields):
      entry[header[i].strip()] = value.strip()
      data.append(entry)

Answer 7

要将CSV文件（两列，多行，无标题）转换为词典列表，我使用了csv module。我的csv文件如下所示：

c1,-------- 
c14,EAE23ED3 
c15,--------

我想创建一个字典列表，将csv文件的每一行都作为字典（键，值对）。我想要的输出是：

[
{
    "c1": "--------"
}, 
{
    "c14": "EAE23ED3"
}, 
{
    "c15": "--------"
}
]

为此，我使用了以下代码：

import csv

csv_path = '.../input_file.csv'

mylist = []
mydict = {}

# read the csv and write to a dictionary
with open(csv_path, 'rb') as csv_file:
    reader = csv.reader(csv_file)
    for row in reader:
        mydict = {row[0]:row[1]}
        mylist.append(mydict)

print(mylist)

在我的情况下有效。为了解决我的问题，这些帖子很有帮助：

将csv文件转换为字典列表

7 个答案: