'None type' object has not attribute error
enter image description here Traceback (most recent call last): AttributeError: 'NoneType' object has no attribute 'reverse', I don't know why the function name is none type. Thank you for ur answer in advance!
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Raspberry Pi Zero W - Detect iBeacon and perform an action
I have a Kontakt.io Beacon Pro - this broadcasts iBeacons. I want to be able to detect the iBeacon using the Raspberry Pi (Zero W) and then for the pi to perform an action using a python script. (turn on LEDs via GPIO). I can detect the iBeacon using the hcitool lescan feature of bluez, but i don't know how (if i can) set up a python script maybe? that will detect the ibeacon and then upon detecting it, will turn the LEDs on.
Setting parameters in pyomo
I am using
pyomo. I would like to set the parameter
mip.limits.solutions = 1. How to do this with either
.set_options(or any other way?
I have tried the following but nothing works:
from pyomo.environ import * opt = SolverFactory("cplex") opt.set_options('miplimitssolutions=1') # does not work opt.set_options('mip.limits.solutions=1') # does not work opt.options['mip'] = 'limits' # this works up to here but how to continue?
decoding entities for Element tree
Is there a comprehensive way to find HTML entities (including foreign language characters) and convert them to hexidecimal encoding or another encoding type that is accepted by ElementTree? Is there a best practice for this?
I'm parsing a large data set of XML, which used HTML entities to encode unicode and special characters. My script passes in an XML file line by line. When I parse the data using python ElementTree, I get the following error.
ParseError: undefined entity: line 296, column 29
I have started by building a dictionary to parse the string and encode into hexidecimal. This has alleviated many of the errors. For example, converting the trademark symbol
™. However, there is no end in sight. This is because I have started to find unicode escaped characters such as 'Å' and 'ö' which are for foreign language. I have looked at several options and will describe them below.
xmlcharrefreplace: This did not find foreign language HTML escaped values.
line = line.encode('ascii', 'xmlcharrefreplace')
HTMLParser.enescape(): Did not work, i believe because XML needs some characters escaped such as '<&>'.
h = HTMLParser.HTMLParser() line = h.unescape(line)
Encoding to UTF-8: Did not work I believe because XML needs some characters escaped.
line = line.encode('utf-8')
BeautifulSoup: This returned a BeautifulSoup object and when converting to a string added an XML version tag to each line and even when replacing that, there was some other type of character additions.
line = BeautifulSoup(line, "xml") line = str(line).replace('<?xml version="1.0" encoding="utf-8"?>', "").replace("\n", "")
htmlentitydefs: Still manages to miss many characters. For example, still missed '?' and '=', however, this got me further than other options.
from htmlentitydefs import name2codepoint line = re.sub('&(%s);' % '|'.join(name2codepoint), lambda m: unichr(name2codepoint[m.group(1)]), line)
How to uninstall python in ubuntu completely and reinstalling it?
The default python version was 2.7.12 in ubuntu. I installed python2.7.13 using the below commands.
Then download using the following command:
version=2.7.13 cd ~/Downloads/ wget https://www.python.org/ftp/python/$version/Python-$version.tgz
Extract and go to the directory:
tar -xvf Python-$version.tgz cd Python-$version
Now, install using the command you just tried, using checkinstall instead to make it easier to uninstall if needed:
./configure sudo make install
Now there is some issue in pandas(giving no module named pandas when I try to import but if we try to install it shows required already satisfied) so I want to completely remove python 2.7.13 and reinstall python 2.7.12. How can I achieve this?
How to make this code more compact and readable
My below code is working fine but I want to make it more pythonic. Furthermore, I want to get rid of nested ifs and make the code more compact and readable. Any suggestions?
def execute(self, project_id, cert_obj_json, status_change_to): if cert_obj_json != "": cert_obj = ssl_certificate.load_from_json( json.loads(cert_obj_json) ) cert_details = cert_obj.cert_details if status_change_to != "" and status_change_to is not None: cert_details['Fastly']['extra_info']['status'] = ( status_change_to) cert_details['Fastly'] = json.dumps(cert_details['Fastly']) self.storage_controller.update_certificate( cert_obj.domain_name, cert_obj.cert_type, cert_obj.flavor_id, cert_details ) service_obj = ( self.service_storage. get_service_details_by_domain_name(cert_obj.domain_name) ) # Update provider details if service_obj is not None: service_obj.provider_details['Fastly'].\ domains_certificate_status.\ set_domain_certificate_status(cert_obj.domain_name, status_change_to) self.service_storage.update_provider_details( project_id, service_obj.service_id, service_obj.provider_details ) else: pass
why incremental varible part of range not getting latest value?
Following piece of code, I expect range to vary every time when the flow increment +2. So I expect 0,8 2,8 4,6 6,8. But it is following the linear increment like 1,2,3,4,5,6,7,8 instead of 2,4,6,8
for i in range(i,count): i+=2 print i
2 3 4 5 6 7 8 9 10 11