Question

我创建了一个Python脚本，用于从API中获取数据，该API在＆text; / csv＆＃39;中返回。格式。我想要做的是使用CSV文件中的标题创建字典字典，或者可能是列表字典，具体取决于更有效。

输出是一个长字符串，我将其分解为一个列表，然后是一个包含以下代码的字典（我已对此进行了清理）：

{0: '"Header1,Header2,Header3,Header4', 
 1: 'R1C1,R1C2,R1C3,R1C4'
 2: 'R2C1,R2C2,R2C3,R2C4"'}

打印dict_results看起来像这样：

{0: {"Header1":"R1C1", "Header2":"R1C2", "Header3":"R1C3", "Header4":"R1C4"}
 1: {"Header1":"R2C1", "Header2":"R2C2", "Header3":"R2C3", "Header4":"R2C4"}
 2: {"Header1":"R3C1", "Header2":"R3C2", "Header3":"R3C3", "Header4":"R3C4"}}

所以我想做的就是得到一些看起来像这样的东西：

while

我还注意到，从results_json_data创建的第一个字符串有一个＆＃34;在开始和＆＃34;最后，我可能需要剥离，以使我看起来像我想要的一切。希望有人能指出我正确的方向;我是编程/ Python的新手。

Answer 1

特别关注csv模块和DictReader课程。如果可能，您应该使用已建立的库来处理csv数据，而不是自己动手：

> import csv

# first param must be an iterable producing strings (the lines of your csv data)
# this tyically is a file-like object, but can be a plain list
> reader = csv.DictReader(list_results_split, delimiter=',')
> reader.fieldnames
["Header1", "Header2", "Header3"]

> lst = list(reader)
[{"Header1":"R1C1", "Header2":"R1C2", "Header3":"R1C3", "Header4":"R1C4"},
 {"Header1":"R2C1", "Header2":"R2C2", "Header3":"R2C3", "Header4":"R2C4"},
 {"Header1":"R3C1", "Header2":"R3C2", "Header3":"R3C3", "Header4":"R3C4"}]

# And
> dict(enumerate(lst))
{0: {"Header1":"R1C1", "Header2":"R1C2", "Header3":"R1C3", "Header4":"R1C4"}
 1: {"Header1":"R2C1", "Header2":"R2C2", "Header3":"R2C3", "Header4":"R2C4"}
 2: {"Header1":"R3C1", "Header2":"R3C2", "Header3":"R3C3", "Header4":"R3C4"}}

查看原始字符串和输出，您应该考虑在处理之前剥离"：

results_json_data = results_json_data.strip('"')

Answer 2

因为（半）单行很有趣：

string = """Header1,Header2,Header3,Header4
R1C1,R1C2,R1C3,R1C4
R2C1,R2C2,R2C3,R2C4"""

string = string.split()
headers, data = string[0].split(","), string[1:]

d = {j:{headers[i]:data[j].split(",")[i] for i in range(len(headers))} for j in range(len(data))}

输出

{0: {'Header2': 'R1C2', 'Header3': 'R1C3', 'Header1': 'R1C1', 'Header4': 'R1C4'},
 1: {'Header2': 'R2C2', 'Header3': 'R2C3', 'Header1': 'R2C1', 'Header4': 'R2C4'}}

如何在Python 2.7中将CSV字符串分解为字典（或列表）字典？

2 个答案: