python从csv返回在特定时间在特定服务器下使用许可证的次数

Question

我有一个名为user_log.csv的csv文件。我需要计算每个特定服务器上和每个特定时间上的每个许可证使用了多少次。 日志文件csv是这样的：

Report Date Time,Server,Licence,User,Host,In Use Since Date Time
02/02/2019 11:50,server1,teamcenter_author,user115,TcServer,02/02/2019 11:48
02/02/2019 11:50,server1,teamcenter_consumer,user133,TcServer,02/02/2019 08:57
02/02/2019 11:50,server2,teamcenter_consumer,user31,TcServer,02/02/2019 10:07
02/02/2019 11:50,server1,teamcenter_consumer,user120,TcServer,02/02/2019 10:15
02/02/2019 11:50,server1,visview_base,user120,client1,02/02/2019 05:14
02/02/2019 11:50,server1,visview_base,user12,client2,02/02/2019 07:19
02/02/2019 11:50,server1,visview_base,user95,client3,02/02/2019 11:10
02/02/2019 11:50,server3,NX12100N,user70,client4,02/01/2019 10:54
02/02/2019 11:50,server3,NX12100N_gateway,user70,client4,02/01/2019 10:54
02/02/2019 11:50,server3,NX12100N_solid_modeling,user70,client4,02/01/2019 10:54
02/02/2019 11:55,server1,teamcenter_author,user115,TcServer,02/02/2019 11:48
02/02/2019 11:55,server1,teamcenter_consumer,user133,TcServer,02/02/2019 08:57
02/02/2019 11:55,server1,teamcenter_consumer,user31,TcServer,02/02/2019 10:07
02/02/2019 11:55,server1,teamcenter_consumer,user120,TcServer,02/02/2019 10:15
02/02/2019 11:55,server1,visview_base,user120,client1,02/02/2019 05:14
02/02/2019 11:55,server1,visview_base,user12,client2,02/02/2019 07:19
02/02/2019 11:55,server1,visview_base,user95,client3,02/02/2019 11:10
02/02/2019 11:55,server1,visview_base,user115,TcServer,02/02/2019 11:50
02/02/2019 11:55,server3,NX12100N,user70,client4,02/01/2019 10:54
02/02/2019 11:55,server3,NX12100N_gateway,user70,client4,02/01/2019 10:54
02/02/2019 11:55,server3,NX12100N_solid_modeling,user70,client4,02/01/2019 10:54

我所写的代码正在遵循

file = open('/user_log.csv', "r")
reader= csv.reader(file)
time={}
for row in reader:
    licence_name = row[2]
    server = row[1]

    if licence_name in time.keys():
        if server in licence_name:
            time[row[2]][row[1]]['count'] += 1
        else:
            time.setdefault(licence_name,{}).setdefault(server,{})['count'] =1
    else:
        time.setdefault(licence_name,{}).setdefault(server,{})['count']=1

return render(request, "stats.html", {'no_of_line':time})

我得到的输出是这样的：

我该怎么办？

Answer 1

license_name是字符串，而不是字典。您想测试server是否在嵌套字典中。

您可以使用if license_name in time，而无需使用time.keys()。

您不需要所有的setdefault()调用，只需根据需要创建新词典。您可以改用该代码将所有这些代码压缩为一行。

file = open('/user_log.csv', "r")
reader= csv.reader(file)
next(reader, None) # Skip the header line
time={}
for row in reader:
    license_name = row[2]
    server = row[1]

    if licence_name in time:
        if server in time[licence_name]:
            time[licence_name][server]['count'] += 1
        else:
            time[licence_name][server] = {"count": 1}
    else:
        time[licence_name] = { server: { "count": 1 } }

return render(request, "stats.html", {'no_of_line':time})

通过此代码获得的time的值和示例CSV文件为：

{'NX12100N': {'server3': {'count': 2}},
 'NX12100N_gateway': {'server3': {'count': 2}},
 'NX12100N_solid_modeling': {'server3': {'count': 2}},
 'teamcenter_author': {'server1': {'count': 2}},
 'teamcenter_consumer': {'server1': {'count': 5}, 'server2': {'count': 1}},
 'visview_base': {'server1': {'count': 7}}}