如何在python中将argparse与json文件一起使用

如何解决如何在python中将argparse与json文件一起使用

我正在用 Python 处理一个项目，我试图用 argparse 设置一些参数。当我在终端中输入其中一个时，我从 JSON 文件中获得了一些信息，但我不知道如何去做。到目前为止，我得到了这些东西：

{
  "services": [
    {
      "name": "ac","version": "1.0.8","service": "running","url": "https://portal.azure.com/#home","disk usage": "20%"
    },{
      "name": "acc","disk usage": "63%"
    },{
      "name": "acv","disk usage": "37%"
    },{
      "name": "acf","disk usage": "48%"
    },{
      "name": "ach","service": "error","disk usage": "10%"
    },{
      "name": "acj","service": "stopped","disk usage": "23%"
    },{
      "name": "acq","disk usage": "65%"
    },{
      "name": "bc",{
      "name": "bcc","disk usage": "25%"
    },{
      "name": "bcx","disk usage": "4%"
    },{
      "name": "bcn","disk usage": "50%"
    },{
      "name": "bcm","disk usage": "35%"
    }
  ]
}

这是我的 JSON 文件，这些是我的 .py 中的参数：

#argparse parameters config
parser = argparse.ArgumentParser()
parser.add_argument("-f","--fullreport",help="printing the full report",default="*")
parser.add_argument("-g","--graphreport",help="printing the graph report",default="*")
parser.add_argument("-s","--services",help="services to be test",default=["*"])
parser.add_argument("-d","--diskusage",help="see the disk usage")

args = parser.parse_args()

我有更多代码，但它是使用 with open 和 a for 例如打印所有 JSON 文件，但我想要的是仅打印例如使用参数 -s 的服务。

解决方法

您可以使用 for 循环：

def print_service_names(data):
    print('Services:')
    for service in data['services']:
        print(service['name'])

def print_service_disk_usages(data):
    print('Disk Usage:')
    for service in data['services']:
        print(f'{service["name"]}:\t{service["disk usage"]}')

print_service_names(json_data)
print_service_disk_usages(json_data)

输出：

Services:
ac
acc
acv
acf
ach
acj
acq
bc
bcc
bcx
bcn
bcm

Disk Usage:
ac:     20%
acc:    63%
acv:    37%
acf:    48%
ach:    10%
acj:    23%
acq:    65%
bc:     20%
bcc:    25%
bcx:    4%
bcn:    50%
bcm:    35%

如果你打算用数据做一些更高级的事情，你可以使用推导来重塑它：

# format the data with comprehensions
service_names = [service['name']
                 for service in json_data['services']]
disk_usage = {service['name']: service['disk usage']
              for service in json_data['services']}

from pprint import pprint
pprint(service_names)
pprint(disk_usage)

输出：

['ac','acc','acv','acf','ach','acj','acq','bc','bcc','bcx','bcn','bcm']

{'ac': '20%','acc': '63%','acf': '48%','ach': '10%','acj': '23%','acq': '65%','acv': '37%','bc': '20%','bcc': '25%','bcm': '35%','bcn': '50%','bcx': '4%'}