已经看到很多线程，但是无法找到我的解决方案。我想在Python 2.7中将一个嵌套的JSON转换为CSV。样本JSON文件如下：
sample.json # My JSON file that mainly contains a firewall rule
"rulebase": [
{
"from": 1,
"name": "test-policy",
"rulebase": [
{
"action": "6c488338-8eec-4103-ad21-cd461ac2c473",
"action-settings": {},
"comments": "FYI",
"content": [
"97aeb369-9aea-11d5-bd16-0090272ccb30"
],
"content-direction": "any",
"content-negate": false,
"custom-fields": {
"field-1": "",
"field-2": "",
"field-3": ""
},
"destination": [
"97aeb369-9aea-11d5-bd16-0090272ccb30"
],
"destination-negate": false,
"domain": {
"domain-type": "domain",
"name": "SMC User",
"uid": "41e821a0-3720-11e3-aa6e-0800200c9fde"
},
"enabled": true,
"hits": {
"first-date": {
"iso-8601": "2016-09-04T22:21-0500",
"posix": 1473045718000
},
"last-date": {
"iso-8601": "2018-03-19T03:37-0500",
"posix": 1521448660000
},
"level": "low",
"percentage": "0%",
"value": 36737474
},
"install-on": [
"6c488338-8eec-4103-ad21-cd461ac2c476"
],
"meta-info": {
"creation-time": {
"iso-8601": "2016-09-15T12:42-0500",
"posix": 1473961370382
},
"creator": "System",
"last-modifier": "admin",
"last-modify-time": {
"iso-8601": "2018-08-30T18:36-0500",
"posix": 1535672186192
},
"lock": "unlocked",
"validation-state": "ok"
},
"rule-number": 1,
"service": [
"ef245528-9a3d-11d6-9eaa-3e5a6fdd6a6a",
"dff4f7ba-9a3d-11d6-91c1-3e5a6fdd5151",
"24bee257-6b37-49bb-99aa-557d993a0e48",
"97aeb45c-9aea-11d5-bd16-0090272ccb30",
"97aeb471-9aea-11d5-bd16-0090272ccb30"
],
"service-negate": false,
"source": [
"697bb7e0-0dfe-4070-a21a-68858daae98c",
"349fb05c-99b2-4fb2-aea6-7b447d0e661c"
],
"source-negate": true,
"time": [
"97aeb369-9aea-11d5-bd16-0090272ccb30"
],
"track": {
"accounting": false,
"alert": "none",
"per-connection": true,
"per-session": false,
"type": "598ead32-aa42-4615-90ed-f51a5928d41d"
},
"type": "access-rule",
"uid": "2da21174-0af8-4b5b-b02e-2957a24d70e1",
"vpn": [
"97aeb369-9aea-11d5-bd16-0090272ccb30"
]
},
{
"action": "6c488338-8eec-4103-ad21-cd461ac2c472",
"action-settings": {
"enable-identity-captive-portal": false
},
"comments": "",
"content": [
"97aeb369-9aea-11d5-bd16-0090272ccb30"
],
"content-direction": "any",
"content-negate": false,
"custom-fields": {
"field-1": "",
"field-2": "",
"field-3": ""
},
"destination": [
"b17d4573-ad1a-4126-ae6d-c874ea919cda",
"5b78417c-64ed-4566-9c76-e4e1af25a9ae",
"acb8d280-2ec4-46b1-be9f-c676fa255fb5"
],
"destination-negate": false,
"domain": {
"domain-type": "domain",
"name": "SMC User",
"uid": "41e821a0-3720-11e3-aa6e-0800200c9fde"
},
"enabled": true,
"hits": {
"level": "zero",
"percentage": "0%",
"value": 0
},
"install-on": [
"6c488338-8eec-4103-ad21-cd461ac2c476"
],
"meta-info": {
"creation-time": {
"iso-8601": "2018-07-25T16:27-0500",
"posix": 1532554044090
},
"creator": "admin",
"last-modifier": "admin",
"last-modify-time": {
"iso-8601": "2018-08-31T16:00-0500",
"posix": 1535749228997
},
"lock": "unlocked",
"validation-state": "ok"
},
"name": "tom@gmail.com",
"rule-number": 2,
"service": [
"18ec9eaa-1657-4240-ab97-5f234623336b"
],
"service-negate": false,
"source": [
"293ef5ba-5235-464e-9247-bda26229a998",
"b503873f-0c5f-4798-b87a-dd6ed4561b40"
],
"source-negate": false,
"time": [
"97aeb369-9aea-11d5-bd16-0090272ccb30"
],
"track": {
"accounting": false,
"alert": "none",
"per-connection": true,
"per-session": false,
"type": "598ead32-aa42-4615-90ed-f51a5928d41d"
},
"type": "access-rule",
"uid": "fcc5a2c8-3a78-4cc5-9fd3-e7bd59eb36ba",
"vpn": [
"97aeb369-9aea-11d5-bd16-0090272ccb30"
]
},
{
"action": "6c488338-8eec-4103-ad21-cd461ac2c472",
"action-settings": {
"enable-identity-captive-portal": false
},
"comments": "FYI",
"content": [
"97aeb369-9aea-11d5-bd16-0090272ccb30"
],
"content-direction": "any",
"content-negate": false,
"custom-fields": {
"field-1": "",
"field-2": "",
"field-3": ""
},
"destination": [
"b17d4573-ad1a-4126-ae6d-c874ea919cda",
"5b78417c-64ed-4566-9c76-e4e1af25a9ae",
"acb8d280-2ec4-46b1-be9f-c676fa255fb5"
],
"destination-negate": false,
"domain": {
"domain-type": "domain",
"name": "SMC User",
"uid": "41e821a0-3720-11e3-aa6e-0800200c9fde"
},
"enabled": true,
"hits": {
"first-date": {
"iso-8601": "2018-03-14T14:55-0500",
"posix": 1521057347000
},
"last-date": {
"iso-8601": "2018-03-19T03:58-0500",
"posix": 1521449932000
},
"level": "low",
"percentage": "0%",
"value": 11801
},
"install-on": [
"6c488338-8eec-4103-ad21-cd461ac2c476"
],
"meta-info": {
"creation-time": {
"iso-8601": "2018-03-14T09:47-0500",
"posix": 1521038846894
},
"creator": "System",
"last-modifier": "admin",
"last-modify-time": {
"iso-8601": "2018-08-31T16:17-0500",
"posix": 1535750234317
},
"lock": "unlocked",
"validation-state": "ok"
},
"name": "tom1@gmail.com",
}
从上述JSON文件中，我要求将键{uid，名称，规则号，注释，目标，源，hits.last-date}等及其值基本上重定向到CSV。
通过下面的代码，我能够生成CSV，但似乎只是解析标头，没有别的。
import json
import csv
def get_leaves(item, key=None):
if isinstance(item, dict):
leaves = []
for i in item.keys():
leaves.extend(get_leaves(item[i], i))
return leaves
elif isinstance(item, list):
leaves = []
for i in item:
leaves.extend(get_leaves(i, key))
return leaves
else:
return [(key, item)]
with open('sample.json') as f_input, open('output.csv', 'wb') as f_output:
csv_output = csv.writer(f_output)
write_header = True
for entry in json.load(f_input):
leaf_entries = sorted(get_leaves(entry))
if write_header:
csv_output.writerow([k for k, v in leaf_entries])
write_header = False
csv_output.writerows([v for k, v in leaf_entries.items()])
请指导我，因为我是Python脚本的新手。
答案 0 :(得分：0)
您几乎在那里。您只是在用csv_output.writerow()创建的列表上调用[v for k, v in leaf_entries]。您应该致电csv_output.writerows()。
有关这些电话的信息，请点击此处： https://docs.python.org/3/library/csv.html#writer-objects
答案 1 :(得分：0)
只是想通了。下面的代码可以正常工作，并从我的复杂JSON文件生成有效的csv数据。
# Generate CSV from JSON
fw_access_layers_data = open('show-access-layers.json', 'r')
fw_access_layers_parsed = json.loads(fw_access_layers_data.read())
access_layers = fw_access_layers_parsed['access-layers']
fw_access_layers_csv = open('show-access-layers.csv', 'w')
csvwriter = csv.writer(fw_access_layers_csv)
count = 0
for access_layer in access_layers:
if count == 0:
header = access_layer.keys()
csvwriter.writerow(header)
count += 1
csvwriter.writerow(access_layer.values())
fw_access_layers_csv.close()
感谢您的帮助伙伴。