In python, an OverflowError is raised when the number we are trying to compute is so large that it cannot be represented in a built-in float object, which I think is limited to 32 bits. I would like to understand the full meaning of the message printed by OverflowError in the following example:
>>> 10.1 ** 400
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OverflowError: (34, 'Result too large')
What does 34 stand for in this message?
That's the built-in error code. Each error type is assigned a different error code. For instance for OSerror, expect to see 25 as the error code. You can see other built-in error types here: https://pymotw.com/2/exceptions/
Related
I am testing out python opencv (cv2) to detect multiple images using openvino DNN models.
My code for first detection:
import cv2
dog=cv2.imread("dog.jfif")
cat=cv2.imread("cat.jfif")
net=cv2.dnn.readNet("ssd_mobilenetv2_fp16_scale2.xml","ssd_mobilenetv2_fp16_scale2.bin")
blob=cv2.dnn.blobFromImage(dog)
net.setInput(blob)
out=net.forward()
Until here, no error is shown and print (out) shows that the "dog" detection is successful.
But then when i continue the next detection of "cat" image by adding the next few lines:
blob=cv2.dnn.blobFromImage(cat)
net.setInput(blob)
out=net.forward()
And I get:
>>> out = net.forward()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
cv2.error: OpenCV(4.3.0-openvino) ../opencv/modules/dnn/src/ie_ngraph.cpp:522: error: (-215:Assertion failed) !isInitialized() in function 'initPlugin'
Why does this error occur? What is the correct way to do for the second detection?
Probably you can try to run the dog and cat detection separately because the program might confuse of those 2 inputs that came at the same time during the implementation of blob.
Another workaround is, if you still want them to work simultaneously, name the blob differently such as:
For dog:
blob1=cv2.dnn.blobFromImage(dog)
net.setInput(blob1)
For cat
blob2=cv2.dnn.blobFromImage(cat)
net.setInput(blob2)
so that the function net.setInput(blob) doesn't get confuse on which input it should refer to.
Thanks!
I am using ete3(http://etetoolkit.org/) package in Python within a bioinformatics pipeline I wrote myself.
While running this script, I get the following error. I have used this script a lot for other datasets which don't have any issues and have not given any errors. I am using Python3.5 and miniconda. Any fixes/insights to resolve this error will be appreciated.
[Error]
Traceback (most recent call last):
File "/Users/d/miniconda2/envs/py35/bin/ete3", line 11, in <module>
load_entry_point('ete3==3.1.1', 'console_scripts', 'ete3')()
File "/Users/d/miniconda2/envs/py35/lib/python3.5/site-packages/ete3/tools/ete.py", line 95, in main
_main(sys.argv)
File "/Users/d/miniconda2/envs/py35/lib/python3.5/site-packages/ete3/tools/ete.py", line 268, in _main
args.func(args)
File "/Users/d/miniconda2/envs/py35/lib/python3.5/site-packages/ete3/tools/ete_ncbiquery.py", line 168, in run
collapse_subspecies=args.collapse_subspecies)
File "/Users/d/miniconda2/envs/py35/lib/python3.5/site-packages/ete3/ncbi_taxonomy/ncbiquery.py", line 434, in get_topology
lineage = id2lineage[sp]
KeyError: 3
Continuing from the comment section for better formatting.
Assuming that the sp contains 3 as suggested by the error message (do check this yourself). You can inspect the ete3 code (current version) following its definition, you can trace it to line:
def get_lineage_translator(self, taxids):
"""Given a valid taxid number, return its corresponding lineage track as a
hierarchically sorted list of parent taxids.
So I went to https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi
and checked if 3 is valid taxid and it appears that it is not.
# relevant section from ncbi taxonomy browser
No result found in the Taxonomy database for taxonomy id
3
It appears to me that your only option is to trace how the 3 gets computed. Because the root cause is simply that taxid 3 is not valid taxid number as required by the function.
this is my code
import requests
r = requests.get('https://www.reddit.com/r/Art.json').json()
print(r['data'])
this code sometimes work but sometimes get fail
Exception is
Traceback (most recent call last):
File "c:/Users/SAMET/Desktop/python/a.py", line 5, in <module>
print(r['data'])
KeyError: 'data'
You must use r.data. r['data'] could work in Javascript, but in Python you can't access objects as dictionaries.
I try to get the custom json from my OpsWorks stacks with python and boto3. Getting the name is ok but if I want to get the CustomJson - KeyError. Don't have a clue why.
import boto3
import traceback
client = boto3.client('opsworks')
response = client.describe_stacks()
max_elements = len(response['Stacks'])
for i in range(max_elements):
stack_Name = response['Stacks'][i]['Name'] # works
try:
stack_CustomJson = response['Stacks'][i]['CustomJson'] # KeyError
except:
traceback.print_exc()
That's the console output:
$ python3 get_custom_json.py
Traceback (most recent call last):
File "get_custom_json.py", line 27, in get_opsworks_details
stack_CustomJson = response['Stacks'][i]['CustomJson']
KeyError: 'CustomJson'
Reading the docs from http://boto3.readthedocs.org/en/latest/reference/services/opsworks.html#OpsWorks.Client.describe_stacks I don't see a difference between 'Name' and 'CustomJson' except that CustomJson is a JSON object. Do I have to transform it?
Thx in advance
You are getting a KeyError occasionally because the CustomStack element in the response is optional. If a custom stack is specified for the stack, it will be returned. Otherwise, the CustomStack key will not be there at all. You should do something like:
if 'CustomStack' in stack:
# do your thing
Had a quick chat with a developer in my company. Got some basic introductions for getting better in coding and python and whatever (must loose some of my admin thinking).
Don't iterate about max_elements, better iterate above 'stack in stacks'.
for stack in response['Stacks']:
print(stack['CustomJson'])
Now it works - I'll get the custom json from the OpsWorks stacks. But still there is the KeyError.
Traceback (most recent call last):
File "get_custom_json.py", line 22, in <module>
get_opsworks_details()
File "get_custom_json.py", line 18, in get_opsworks_details
print(stack['CustomJson'])
KeyError: 'CustomJson'
I'll check if I can fetch him again to see why that's happening.
[EDIT] Blind spot - if a stack has no custom json then the KeyError will occur.
I am using cassandra db ,while i use select at some times i get this exception?
Traceback (most recent call last):
File "bin/cqlsh", line 1001, in perform_statement_untraced
self.cursor.execute(statement, decoder=decoder)
File "bin/../lib/cql-internal-only-1.4.0.zip/cql-1.4.0/cql/cursor.py", line 81, in execute
return self.process_execution_results(response, decoder=decoder)
File "bin/../lib/cql-internal-only-1.4.0.zip/cql-1.4.0/cql/thrifteries.py", line 131, in process_execution_results
raise Exception('unknown result type %s' % response.type)
Exception: unknown result type None
can any one explain why this exceptions occur and also i get Internal application error.
what this error message actually means?
EDIT: I get this error for the first time, next time onwards its running correctly.I dont get why it is so?
//cql query via cqlsh
select * from event_logging limit 5;