Python csv转换

Question

我有下面的代码来遍历我的CSV值。输入数据（Sample.csv）：

name,city
jack,nj
matt,ny

并以JSON格式创建输出。所需输出

[
{"name": "jack","city": "PA"},
{"name": "matt","city": "CA"}
]

代码输出：

[{"name,city": "jack,PA"};{"name,city": "matt,CA"};]

代码示例：

#!/usr/bin/python

import json
import csv
csvfile = open('sample.csv', 'r')
jsonfile = open('sample.csv'.replace('.csv','.json'), 'w')

jsonfile.write('{\n[\n')
fieldnames = csvfile.readline().replace('\n','').split(';')
reader = csv.DictReader(csvfile, fieldnames, delimiter=';')

from collections import OrderedDict
  for row in reader:  
    json.dump(OrderedDict([(f, row[f]) for f in fieldnames]), jsonfile, indent=4)
    jsonfile.write(';\n')
    jsonfile.write(']\n}')

最终输出未对齐到键值对。你知道吗

Answer 1

我能够实现我所需要的，可能不是最好的解决方案，但肯定是我现在正在寻找的。你知道吗

import sys, getopt
ifile=''
ofile=''
format=''

#get argument list using sys module
myopts, args = getopt.getopt(sys.argv[1:],"i:o:f")

for o,a in myopts:
            if o == '-i':
                        ifile=a
            elif o == '-o':
                        ofile=a
            elif o == '-f':
                        format=a
            else:
                        print("Usage: %s -i input -o output -f format" % sys.argv[0])

#Reset the output file for each run
reset = open(ofile,"w+")
reset.close()

#Read CSV in a ordered Column Format & output in JSON format

from collections import OrderedDict
import csv
import json
import os
with open(ifile,'r') as f:
    reader = csv.reader(f,delimiter=',', quotechar='"')
    headerlist = next(reader)
    for row in reader:
            d = OrderedDict()
            for i, x in enumerate(row):
                    print x
                    d[headerlist[i]] = x
            with open(ofile,'a') as m:
               if format == "pretty":
                    m.write(json.dumps(d, sort_keys=False, indent=4, separators=(',', ': '),encoding="utf-8",ensure_ascii=False))
                    m.write(',\n')
               else:
                    m.write(json.dumps(d))
                    m.write(',\n')


#Module to remove the trailing delimiter

file = open(ofile, "r+")
file.seek(0, os.SEEK_END)
pos = file.tell() - 1
while pos > 0 and file.read(1) != ",":
     pos -= 1
     file.seek(pos, os.SEEK_SET)


if pos > 0:
     file.seek(pos, os.SEEK_SET)
     file.truncate()
file.writelines('\n')
file.close()