以列表的形式获取指纹并访问每一个

Question

from myfolder import typing_commands as tcm
import sys, StringIO
class InfoTest(StartUpTest):
    IS_TEST = True
    def __init__(self):
        super(InfoTest, self).__init__()

    def setup(self):
        return

    def runtest(self):
        tcm.erase_flash()
        self.boot() # boot method is defined in StartUpTest class
        time.sleep(20)
        tcm.info_read() #Here it prints all the info see o/p1

        #To get The printed data in list form
        old_stdout = sys.stdout
        capturer = StringIO.StringIO()
        sys.stdout = capturer
        tcm.info_read()
        sys.stdout = old_stdout
        output = capturer.getvalue().splitlines()

        for each in output[8:]:
            print each, type(each)
        print type(output)  #see o/p2
        return

开/关：

Info as desired:
Downloading Logs...
Info Downloaded!

####################
Info Entry 1:
####################
        Type                : Survey
        Survey_time         : 2014-09-05 10:10:40
        Inclination    (deg): 45
        Temperature     (C) : 30.00
        Battery_Voltage (mV): 24.0

o/p2编号：

        Survey_time         : 2014-09-05 10:11:44 <type 'str'>
        Inclination    (deg): 45 <type 'str'>
        Temperature     (C) : 30.00 <type 'str'>
        Battery_Voltage (mV): 24.0 <type 'str'>

<type 'list'>

现在我的问题是，虽然我能够得到列表形式的output，output的each实际上是一个str。我想检查Battery_Voltage是否在范围内，即大于20V，与其他电压相同，例如Temperature和Inclination。我应该如何为每个提取值，以便对它们执行检查？我还必须硬编码它来接触我的一套支票

for each in output[8:]:
            print each, type(each)

有没有更好的办法

Answer 1

还有一种方法更灵活，您可以更好地控制必须应用于这些值的条件。当有很多字段需要处理并且需要做一些更复杂的事情时，这可能会很有帮助

我们可以为每个字段动态调用特定于此特定描述的方法。例如，当处理描述为Battery的字段时，我们调用FieldProcessor类的process\u Battery，依此类推

所以在打印功能中：

for each in output[8:]:
            print each, type(each)

我会添加一些代码如下：

import re, sys
from collections import namedtuple

for each in output[8:]:

   # I prefer using namedtuple so we can use tuple.description and tuple.value
   field = namedtuple("field", "description value")

   # Regular expression for extracting the description and value
   # May be optimized, play with it :) takes description containing A-Z,a-z,_
   result = re.findall(r'^ *([A-Za-z_]*).*: (.*)$', each)
   if len(result):

       # Make namedtuple from tuple
       field = field._make(result[0])

       processor = FieldProcessor()

       # Get function of FieldProcessor with description name
       process_func = getattr(processor, 'process_'+field.description.lower(), None)

       if callable(process_func):
           process_func(field)

   else:
       print "Cannot parse field "+each

然后我们可以有FieldProcessor类，在这里你可以用你的值做任何事情。我希望将str转换为float等不会有问题

class FieldProcessor:
    def process_voltage(self, field):
        pass

    def process_inclination(self, field):
        # Converting to float, int, ...
        if field.value > 20:
            print "Inclination more then 20"

    def process_survey_time(self, field):
        pass

    def process_temperature(self, field):
        pass