我有以下字符串:
{"name":"INPROCEEDINGS","__typename":"PublicationConferencePaper"},"hasPermiss
ionToLike":true,"hasPermissionToFollow":true,"publicationCategory":"researchSu
mmary","hasPublicFulltexts":false,"canClaim":false,"publicationType":"inProcee
dings","fulltextRequesterCount":0,"requests":{"__pagination__":
[{"offset":0,"limit":1,"list":[]}]},"activeFiguresCount":0,"activeFigures":
{"__pagination__":[{"offset":0,"limit":100,"list":
[]}]},"abstract":"Heterogeneous Multiprocessor System-on-Chip (MPSoC) are
progressively becoming predominant in most modern mobile devices. These
devices are required to perform processing of applications within thermal,
energy and performance constraints. However, most stock power and thermal
management mechanisms either neglect some of these constraints or rely on
frequency scaling to achieve energy-efficiency and temperature reduction on
the device. Although this inefficient technique can reduce temporal thermal
gradient, but at the same time hurts the performance of the executing task.
In this paper, we propose a thermal and energy management mechanism which
achieves reduction in thermal gradient as well as energy-efficiency through
resource mapping and thread-partitioning of applications with online
optimization in heterogeneous MPSoCs. The efficacy of the proposed approach is
experimentally appraised using different applications from Polybench benchmark
suite on Odroid-XU4 developmental platform. Results show 28% performance
improvement, 28.32% energy saving and reduced thermal variance of over 76%
when compared to the existing approaches. Additionally, the method is able to
free more than 90% in memory storage on the MPSoC, which would have been
previously utilized to store several task-to-thread mapping
configurations.","hasRequestedAbstract":false,"lockedFields"我正在尝试获取“抽象”:“和","hasRequestedAbstract"之间的子字符串。为此,我使用以下代码:
import requests
#some more codes here........
to_visit_url = 'https://www.researchgate.net/publication/328749434_TEEM_Online_Thermal-_and_Energy-Efficiency_Management_on_CPU-GPU_MPSoCs'
this_page = requests.get(to_visit_url)
content = str(page.content, encoding="utf-8")
abstract = re.search('\"abstract\":\"(.*)\",\"hasRequestedAbstract\"', content)
print('Abstract:\n' + str(abstract))但在抽象变量中,它的值为None。有什么问题吗?如上文所述,如何获取子字符串?
注意:虽然我似乎可以将它读取为JSON对象,但这不是一个选项,因为上面提供的示例文本只是完整html内容的一小部分,很难从中提取JSON对象。
P.S.网页的全部内容,即page.content,可从此处下载:https://docs.google.com/document/d/1awprvKsLPNoV6NZRmCkktYwMwWJo5aujGyNwGhDf7cA/edit?usp=sharing
也可以直接从URL:MPSoCs下载源。
发布于 2018-12-10 21:40:44
这个答案不是使用regex (正则表达式),而是执行任务。答复如下:
import re
import requests
def fetch_abstract(url = "https://www.researchgate.net/publication/328749434_TEEM_Online_Thermal-_and_Energy-Efficiency_Management_on_CPU-GPU_MPSoCs"):
test_requests = requests.get(url)
index = 0
inner_count = 0
while index < len(test_requests.text):
index = test_requests.text.find('[Show full abstract]</a><span class=\"lite-page-hidden', index)
if index == -1:
break
inner_count += 1
if inner_count == 4:
#extract the abstract from here -->
temp = test_requests.text[index-1:]
index2 = temp.find('</span></div><a class=\"nova-e-link nova-e-link--color-blue')
quote_index = temp.find('\">')
abstract = test_requests.text[index + quote_index + 2 : index - 1 + index2]
print(abstract)
index += 52
if __name__ == '__main__':
fetch_abstract()结果:
异构多处理器片上系统(MPSoC)在现代移动设备中正逐渐成为主流.这些设备需要在热、能和性能约束范围内执行应用程序处理。然而,大多数库存电源和热管理机制要么忽略了这些限制,要么依靠频率缩放来实现设备的节能和降温。虽然这种效率低下的技术可以降低时间的热梯度,但同时也损害了执行任务的性能。在本文中,我们提出了一种热能管理机制,通过资源映射和线程划分,在异构MPSoCs中通过在线优化来降低热梯度和节能。在Odroid-XU4开发平台上使用Polybench基准套件的不同应用,对该方法的有效性进行了实验评估。结果表明,与现有方法相比,系统性能提高了28%,节能率提高了28.32%,热方差降低了76%以上。此外,该方法能够释放超过90%的内存存储在MPSoC上,这本来可以用来存储几个任务到线程的映射配置。
发布于 2018-12-07 09:58:34
re.search不返回解析的结果列表。它返回SRE_Match对象。如果要获得匹配列表,则需要使用re.findall方法。
发布于 2018-12-07 10:07:57
当您执行requests.get(...)时,您应该得到请求对象吗?
这些对象非常聪明,您可以使用内置的.json()方法将您在问题中发布的字符串作为python字典返回。
尽管我注意到您发布的链接没有指向任何类似的内容,但是指向了一个完整的html文档。如果你想解析一个这样的网站,你应该去看看漂亮的汤。(https://www.crummy.com/software/BeautifulSoup/)
https://stackoverflow.com/questions/53666675
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