Is Yahoo data getting flaky again ?
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- Lemon Slice
- Posts: 761
- Joined: November 19th, 2016, 1:35 pm
Is Yahoo data getting flaky again ?
A few months back, Yahoo changed the availabilty of its data which needed a re-coding of various macros. Since that time, the Yahoo data source had been pretty reliable.
I have noticed over the past couple of weeks that I am getting a "No data returned from Yahoo" far more frequently. It does correct itself during the day, but there do seem to be more problems at present than has been the case.
Has anyone else noticed this ?
Thanks
Mike
Windows 8.1, Open Office 4.1.5
Simple Yahoo Price Scrape
HYPTUSS (Just downloaded to check it wasn't just my program)
I have noticed over the past couple of weeks that I am getting a "No data returned from Yahoo" far more frequently. It does correct itself during the day, but there do seem to be more problems at present than has been the case.
Has anyone else noticed this ?
Thanks
Mike
Windows 8.1, Open Office 4.1.5
Simple Yahoo Price Scrape
HYPTUSS (Just downloaded to check it wasn't just my program)
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- Lemon Quarter
- Posts: 3865
- Joined: November 4th, 2016, 9:24 am
Re: Is Yahoo data getting flaky again ?
I've been using HYPTUSS a lot recently while developing the new enhancements and have not seen any Yahoo problems at all. I normally use LibreOffice.
I just checked HYPTUSS version b-i and the Simple Yahoo Price Scrape v1.3a using OpenOffice 4.1.3 Portable and Yahoo refuses to download prices. I check these tools on Windows and Linux, with various versions of LibreOffice and Openoffice before I publish so it sounds like something has changed on the Yahoo side.
I'll have a look at it. Thanks for reporting the problem.
--kiloran
I just checked HYPTUSS version b-i and the Simple Yahoo Price Scrape v1.3a using OpenOffice 4.1.3 Portable and Yahoo refuses to download prices. I check these tools on Windows and Linux, with various versions of LibreOffice and Openoffice before I publish so it sounds like something has changed on the Yahoo side.
I'll have a look at it. Thanks for reporting the problem.
--kiloran
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- 2 Lemon pips
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Re: Is Yahoo data getting flaky again ?
I'm not sure if it is related but I had a problem with my homegrown data scrape code (Python 3.5 and LO 6 under MacOS) not retrieving data from Yahoo a couple of weeks ago.kiloran wrote:I've been using HYPTUSS a lot recently while developing the new enhancements and have not seen any Yahoo problems at all. I normally use LibreOffice.
I just checked HYPTUSS version b-i and the Simple Yahoo Price Scrape v1.3a using OpenOffice 4.1.3 Portable and Yahoo refuses to download prices. I check these tools on Windows and Linux, with various versions of LibreOffice and Openoffice before I publish so it sounds like something has changed on the Yahoo side.
It turned out that the http request was being redirected to https, resulting in no data retrieved. I changed my target url to https without any joy. I finally pinned it down to the SSL lib in Python 3.5, SSL certificate checking was failing (Yahoo not implementing properly?) so the simple fix was to set the default SSL context to ignore cert checks. It seems this behaviour differs from Python 2.
Code: Select all
# Yahoo SSL cert fails in 3.5 so force no check for this version
import ssl
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
# end SSL cert no check
kyu66
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- Lemon Quarter
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Re: Is Yahoo data getting flaky again ?
It's probably something along those lines. My normal Python work uses v3.6 and LibreOffice is v3.5 and these work fine.kyu66 wrote:I'm not sure if it is related but I had a problem with my homegrown data scrape code (Python 3.5 and LO 6 under MacOS) not retrieving data from Yahoo a couple of weeks ago.kiloran wrote:I've been using HYPTUSS a lot recently while developing the new enhancements and have not seen any Yahoo problems at all. I normally use LibreOffice.
I just checked HYPTUSS version b-i and the Simple Yahoo Price Scrape v1.3a using OpenOffice 4.1.3 Portable and Yahoo refuses to download prices. I check these tools on Windows and Linux, with various versions of LibreOffice and Openoffice before I publish so it sounds like something has changed on the Yahoo side.
It turned out that the http request was being redirected to https, resulting in no data retrieved. I changed my target url to https without any joy. I finally pinned it down to the SSL lib in Python 3.5, SSL certificate checking was failing (Yahoo not implementing properly?) so the simple fix was to set the default SSL context to ignore cert checks. It seems this behaviour differs from Python 2.
HTHCode: Select all
# Yahoo SSL cert fails in 3.5 so force no check for this version import ssl ctx = ssl.create_default_context() ctx.check_hostname = False ctx.verify_mode = ssl.CERT_NONE # end SSL cert no check
kyu66
OpenOffice uses Python 2.7 and the coding for web scraping differs significantly, so I'm just installing Python 2.7 on my laptop to investigate more thoroughly. I have a vague recollection of SSL differences between 2.7 and 3.x
--kiloran
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- Lemon Quarter
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Re: Is Yahoo data getting flaky again ?
Hmm... the code runs fine using my standalone version of Python 2.7 so it looks like the problem lies within OpenOffice.
Investigation continues
--kiloran
Investigation continues
--kiloran
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- Lemon Half
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Re: Is Yahoo data getting flaky again ?
I've just tried the latest Excel version with a fairly large portfolio, and the Yahoo prices downloaded without any issues.
Cheers,
Itsallaguess
Cheers,
Itsallaguess
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- Lemon Quarter
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Re: Is Yahoo data getting flaky again ?
It's definitely an OpenOffice issue.Itsallaguess wrote:I've just tried the latest Excel version with a fairly large portfolio, and the Yahoo prices downloaded without any issues.
Cheers,
Itsallaguess
Standalone Python 3.6 works fine
Libreoffice (all versions) with Python 3.x work fine
Standalone Python 2.7.15 works fine
OpenOffice (all versions) with Python 2.7 all fail
But.... if I use the OpenOffice Python installation as a standalone Python, it works fine!!!
So something very mysterious within OpenOffice itself.
I see Python 2.7 will be deprecated from 01Jan2020 so I guess OpenOffice will have to be updated to Python 3.x. Hooray!!!
--kiloran
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- Lemon Slice
- Posts: 761
- Joined: November 19th, 2016, 1:35 pm
Re: Is Yahoo data getting flaky again ?
Thanks guys. This is an intermittent fault I'm seeing, but only over the last fortnight or so. Before there was the major disruption of Yahoo changing their address for scraping the data a few months back, the download did fail from time to time, but one or two repeats normally obtained the data.
I am now noticing the download failing for periods of hours, rather than just re-initiating the price scrape to solve the problem.
It has been OK for me since late morning. If others are noticing this, then I will assume it is general, but if I am the only one then it is me. If the feeling is that it is only OpenOffice users, time possibly for a re-think by me.
Thanks to all
I am now noticing the download failing for periods of hours, rather than just re-initiating the price scrape to solve the problem.
It has been OK for me since late morning. If others are noticing this, then I will assume it is general, but if I am the only one then it is me. If the feeling is that it is only OpenOffice users, time possibly for a re-think by me.
Thanks to all
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- Lemon Quarter
- Posts: 3865
- Joined: November 4th, 2016, 9:24 am
Re: Is Yahoo data getting flaky again ?
I'm getting confused!
I've been trying OpenOffice Portable versions 3.2.0, 4.1.1 and 4.1.3 and they have consistently failed today when using the Simple Yahoo Price Scrape v1.3a
I installed OpenOffice Portable 4.1.5 (the latest), fired it up and set the macro security level to Medium (my usual preference), opened the price scrape and it worked. Every time. Closed OO, opened it again, and the price scrape now fails every time! Rebooted the Win10 laptop and still have the problem. Disabled the Comodo Firewall and it still fails.
Meanwhile, all my LibreOffice versions are working fine.
What on earth is going on?
--kiloran
I've been trying OpenOffice Portable versions 3.2.0, 4.1.1 and 4.1.3 and they have consistently failed today when using the Simple Yahoo Price Scrape v1.3a
I installed OpenOffice Portable 4.1.5 (the latest), fired it up and set the macro security level to Medium (my usual preference), opened the price scrape and it worked. Every time. Closed OO, opened it again, and the price scrape now fails every time! Rebooted the Win10 laptop and still have the problem. Disabled the Comodo Firewall and it still fails.
Meanwhile, all my LibreOffice versions are working fine.
What on earth is going on?
--kiloran
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- 2 Lemon pips
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Re: Is Yahoo data getting flaky again ?
In my case, to pin down the error I was getting I had to let Python exceptions filter up and be reported by LO. If your code is anything like this it may be worth a shot.kiloran wrote:I'm getting confused!
...
What on earth is going on?
--kiloran
I was accessing the url in a try/except block and not propagating the specific error back to LO as below, the LO code just relied on a non 0 return value.
Code: Select all
try:
if sys.version[0:1] == '3':
response = urllib.urlopen(url, context=ctx)
else:
response = urllib.urlopen(url)
# updated for Yahoo JSON API
raw = response.read()
decoded_raw = raw.decode('utf-8') # Or any other ISO format
result = ConvertedJSON(decoded_raw)
return result
except IOError:
return 0
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- Lemon Slice
- Posts: 761
- Joined: November 19th, 2016, 1:35 pm
Re: Is Yahoo data getting flaky again ?
I've just re-run the Simple Yahoo Price Scrape at 17:13 and it worked fine. Mine is OO 4.1.5kiloran wrote:I'm getting confused!
I've been trying OpenOffice Portable versions 3.2.0, 4.1.1 and 4.1.3 and they have consistently failed today when using the Simple Yahoo Price Scrape v1.3a
I installed OpenOffice Portable 4.1.5 (the latest), fired it up and set the macro security level to Medium (my usual preference), opened the price scrape and it worked. Every time. Closed OO, opened it again, and the price scrape now fails every time! Rebooted the Win10 laptop and still have the problem. Disabled the Comodo Firewall and it still fails.
Meanwhile, all my LibreOffice versions are working fine.
What on earth is going on?
--kiloran
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- Lemon Quarter
- Posts: 3865
- Joined: November 4th, 2016, 9:24 am
Re: Is Yahoo data getting flaky again ?
Indeed. With all the odd things going on, I was failing to look at the basics. My code does use a Try/Except structure but I wasn't doing anything with the error code. Dumped this to a file and the error is "<urlopen error unknown url type: https>". That does ring a bell with some OpenOffice problems I was having a year or two ago, which I think were SSL related.kyu66 wrote:In my case, to pin down the error I was getting I had to let Python exceptions filter up and be reported by LO. If your code is anything like this it may be worth a shot.kiloran wrote:I'm getting confused!
...
What on earth is going on?
--kiloran
I was accessing the url in a try/except block and not propagating the specific error back to LO as below, the LO code just relied on a non 0 return value.HTHCode: Select all
try: if sys.version[0:1] == '3': response = urllib.urlopen(url, context=ctx) else: response = urllib.urlopen(url) # updated for Yahoo JSON API raw = response.read() decoded_raw = raw.decode('utf-8') # Or any other ISO format result = ConvertedJSON(decoded_raw) return result except IOError: return 0
Thanks for putting me back on the straight and narrow
But why on earth did OO 4.1.5 work the first time I tried it and failed on subsequent attempts???
--kiloran
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- Lemon Quarter
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- Joined: November 4th, 2016, 9:24 am
Re: Is Yahoo data getting flaky again ?
I just deleted OO 4.1.5 then reinstalled it. And once again, after I had set Macro Security to Medium and opened the Yahoo Price Scrape, it worked 100% reliably. But when I closed OO and then reopened, it failed 100% of the time.kiloran wrote: But why on earth did OO 4.1.5 work the first time I tried it and failed on subsequent attempts???
--kiloran
Very strange behaviour. At least it appears to be consistent so I have something to work on
--kiloran
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- 2 Lemon pips
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Re: Is Yahoo data getting flaky again ?
I found little concrete info on the Python/LO/OO combination with respect to SSL cert checking, hence my sledgehammer approach to forcing Python to NOT check the SSL cert by using a context- see my previous post. Caching/default certificate locations etc could all be possible areas of investigation but I deemed it too much like hard work.kiloran wrote:I just deleted OO 4.1.5 then reinstalled it. And once again, after I had set Macro Security to Medium and opened the Yahoo Price Scrape, it worked 100% reliably. But when I closed OO and then reopened, it failed 100% of the time.kiloran wrote: But why on earth did OO 4.1.5 work the first time I tried it and failed on subsequent attempts???
--kiloran
Very strange behaviour. At least it appears to be consistent so I have something to work on
--kiloran
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- Lemon Quarter
- Posts: 3865
- Joined: November 4th, 2016, 9:24 am
Re: Is Yahoo data getting flaky again ?
The issue is with definitely with OpenOffice, which uses 24-bit Python 2.7.15 (not Python 3). The problem exists on two Windows 10 laptops, with Desktop or Portable versions of OpenOffice.kyu66 wrote:In my case, to pin down the error I was getting I had to let Python exceptions filter up and be reported by LO. If your code is anything like this it may be worth a shot.kiloran wrote:I'm getting confused!
...
What on earth is going on?
--kiloran
I was accessing the url in a try/except block and not propagating the specific error back to LO as below, the LO code just relied on a non 0 return value.HTHCode: Select all
try: if sys.version[0:1] == '3': response = urllib.urlopen(url, context=ctx) else: response = urllib.urlopen(url) # updated for Yahoo JSON API raw = response.read() decoded_raw = raw.decode('utf-8') # Or any other ISO format result = ConvertedJSON(decoded_raw) return result except IOError: return 0
I tried the following test script:
Code: Select all
try:
import ssl
import socket
except Exception as e:
with open('C:/Users/User/Downloads/pydump.txt','w') as logfile:
logfile.write(str(e) + "\n")
import urllib2
def test():
url = 'https://query1.finance.yahoo.com/v7/finance/quote?symbols=SSE.L'
try:
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
req = urllib2.urlopen(url)
response = req.read()
f = open('C:/Users/User/Downloads/pydump.txt','a')
f.write(response + "\n")
f.close()
except Exception as e:
with open('C:/Users/User/Downloads/pydump.txt','a') as logfile:
logfile.write(str(e) + "\n")
I checked the OpenOffice version of ssl.py and sure enough there is no reference to create_default_context (LibreOffice and standalone versions of Python do have create_default_context in their ssl.py files)
My standalone installation of Python 2.7.15 is fine, as is LibreOffice and Python 3
I'm convinced it's an OpenOffice problem, with the wrong version of ssl.py packaged within it, and I'll report it as a bug. I think I could work around it, but I'll park that for the moment, I've spent far too much time on it in the past few days. I need to get back to testing and debugging the enhanced HYPTUSS that Itsallaguess and I are working on.
Many thanks for your ideas, kyu66
--kiloran
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- Lemon Quarter
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Re: Is Yahoo data getting flaky again ?
HYPTUSS retrieving yields for BHP & PSN as zero or n/a.
Tried updating the Digital Look datasheet to no avail
Tried updating the Digital Look datasheet to no avail
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- Lemon Quarter
- Posts: 3865
- Joined: November 4th, 2016, 9:24 am
Re: Is Yahoo data getting flaky again ?
HYPTUSS gets yields from Webfg (ex Digital Look), not Yahoo, the subject of this thread.TUK020 wrote:HYPTUSS retrieving yields for BHP & PSN as zero or n/a.
Tried updating the Digital Look datasheet to no avail
BHP.... https://uk.webfg.com/equity/BHP_Group shows n/a for Forecast Yield. This is therefore correctly displayed in HYPTUSS
PSN... https://uk.webfg.com/equity/Pearson shows n/a for Forecast Yield. This is therefore correctly displayed in HYPTUSS
--kiloran
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- Lemon Quarter
- Posts: 1915
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Re: Is Yahoo data getting flaky again ?
apologies for confusion on both countskiloran wrote: HYPTUSS gets yields from Webfg (ex Digital Look), not Yahoo, the subject of this thread.
BHP.... https://uk.webfg.com/equity/BHP_Group shows n/a for Forecast Yield. This is therefore correctly displayed in HYPTUSS
PSN... https://uk.webfg.com/equity/Pearson shows n/a for Forecast Yield. This is therefore correctly displayed in HYPTUSS
--kiloran