Python：如何读取每行都是一个字符串的 CSV 文件？

Question

I am trying to read a CSV file. I need to access the keys and values in each line.

"{id:495981,start:""2020-09-23"",end:""2020-09-23"",something:point({srid:4326, x:10.96791704, y:49.7989944})}"
"{id:49963,start:""2020-09-23"",end:""2020-09-23"",something:point({srid:4326, x:10.96791704, y:49.7989944})}"

As shown above, each line is a string. What I want to do is reading the value of id in each line. Reading the file with "panda.read_csv" return something like this:

  {id:495981   end:""2020-09-23""  start:""2020-09-23""  \
    0      {id:49963   end:""2020-09-23""  start:""2020-09-23""  
           ...
    something:point({srid:4326         x:7.138        y:51.594})}  
    0      something:point({srid:4326   x:10.96791704    y:49.7989944})}
[31264 rows x 6 columns]

Any suggestions??

Answer 1

You could utilize regex here to pull each result out of the string as splitting would include the extra characters I'm assuming you would want to exclude.

import re

data = {}

with open('mycsvfile.csv', 'r') as file:
    for line in file:
        line_id = re.search('(?<=id:)[0-9]*(?=,)', line).group(0)
        line_data = {'start': re.search('(?<=start:"").*(?="",end)', line).group(0),
                     'end': re.search('(?<=end:"").*(?="",something)', line).group(0),
                     'something': re.search('(?<=something:).*(?=}")', line).group(0),
                     }
        data[line_id] = line_data

print(data)

This will result in a dict with all ids as a key with each key containing another dict with all the values in the string.

{'495981': {'start': '2020-09-23', 'end': '2020-09-23', 'something': 'point({srid:4326, x:10.96791704, y:49.7989944})'}, 
'49963': {'start': '2020-09-23', 'end': '2020-09-23', 'something': 'point({srid:4326, x:10.96791704, y:49.7989944})'}}