This example shows how to access the 'match metrics' assocaited with a result from 51Degrees device detection. Match metrics are various properties that indicate the level of confidence that the supplied evidence corresponds to the result that has been returned.

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22

23

28

29 from fiftyone_devicedetection_onpremise.devicedetection_onpremise_pipelinebuilder import DeviceDetectionOnPremisePipelineBuilder

30 from fiftyone_devicedetection_examples.example_utils import ExampleUtils

31

32 # First create the device detection pipeline with the desired settings.

33

34 data_file = ExampleUtils.find_file("51Degrees-LiteV4.1.hash")

35

36 pipeline = DeviceDetectionOnPremisePipelineBuilder(

37 data_file_path = data_file,

38 licence_keys = "",

39 performance_profile = 'MaxPerformance',

40 auto_update=False).build()

41

42 # Now we can take a User-Agent and run it through this pipeline

43

44 # First we create a FlowData object from the pipeline

45 flowdata = pipeline.create_flowdata()

46

47 # Then we add the User-Agent we are interested in as evidence

48 iphone_ua = "Mozilla/5.0 (iPhone; CPU iPhone OS 11_2 like Mac OS X) AppleWebKit/604.4.7 (KHTML, like Gecko) Mobile/15C114"

49

50 flowdata.evidence.add("header.user-agent", iphone_ua)

51

52 # Now we process the FlowData using the engines in the Pipeline

53

54 flowdata.process()

55

56 # The device detection engine comes with additional metadata about each match

57

58 if flowdata.device.deviceid.has_value():

59 print('Device ID: ' + str(flowdata.device.deviceID.value()))

60 print("""

61 Consists of four components separated by a hyphen symbol:

62 Hardware-Platform-Browser-IsCrawler where each Component

63 represents an ID of the corresponding Profile.""")

64

65 if flowdata.device.useragents.has_value():

66 print('Matched useragents: ' + str(flowdata.device.useragents.value()))

67 print("The matched useragents")

68

69 if flowdata.device.difference.has_value():

70 print('Difference: ' + str(flowdata.device.difference.value()))

71 print("""

72 Used when detection method is not Exact or None.

73 This is an integer value and the larger the value

74 the less confident the detector is in this result.""")

75

76 if flowdata.device.method.has_value():

77 print('Method: ' + str(flowdata.device.method.value()))

78 print("""Provides information about the algorithm that was used to perform detection for a particular User-Agent.""")

51Degrees Device Detection Python 4.4

onpremise/match_metrics.py