Importerror: libgl.so.1: cannot open shared object file: no such file or directory opencv error

Try this one first:

pip install opencv-python--headless

or 

install follow in case centos or aws linux docker

RUN yum install whatprovides libGL.so.1 -y

install follow in case linux docker

ENV TZ=Europe/Minsk

RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

RUN apt-get install libgtk2.0-dev -y

 

Thank you, Good luck!

AWS dynamoDB, search item by condition in 3 ways

 

Most secure way is 3rd, first and second way can fail when items are many.

code start

#pre define

UID_common = '24dea8d41ef74efda24a4b37805fe6de'

#### way 1 ###

dynamodb_resource = boto3.resource('dynamodb')

docs_table = dynamodb_resource.Table(DOCUMENTS_TABLE_NAME)

resp = docs_table.scan(FilterExpression = Attr('UID_COMMON').eq(UID_common))

for item in resp['Items']:

print( item['UID'] )

#### pre-define ###

dynamo_client = boto3.client('dynamodb',

aws_access_key_id = ACCESS_KEY,

aws_secret_access_key = SECRET_KEY,

region_name = REGION

)

#### way 2 ###

response = dynamo_client.scan(

TableName = DOCUMENTS_TABLE_NAME,

ExpressionAttributeValues={':search':{'S': UID_common} },

FilterExpression = "UID_COMMON = :search"

)

for item in response['Items']:

print(item['UID']['S'] )

### way 3 ###

paginator = dynamo_client.get_paginator('scan')

operation_parameters = {

'TableName': DOCUMENTS_TABLE_NAME,

'FilterExpression': 'UID_COMMON = :search',

'ExpressionAttributeValues': {

':search': {'S': UID_common},

}

}

page_iterator = paginator.paginate(**operation_parameters)

for page in page_iterator:

for item in page['Items']:

print( item['UID']['S'] )

code end

Enjoy AWS!

No module named 'yaml'

pip install pyyaml

delete over than specific megabyte in git history using bfg

firstly, install bfg

on mac

> brew install bfg

delete object if over than 50m in git commit history

> bfg --strip-blobs-bigger-than 50M

make sure & apply .gitignore

First, to check what files are you actually tracking
> git ls-tree --name-only --full-tree -r HEAD


Let say that you found unwanted files in a directory like cache/ so, it's safer to target that directory instead of all of your files.
So instead of:

> git rm -r --cached .


It's safer to target the unwanted file or directory:
> git rm -r --cached cache/


Then proceed to add all changes:
> git add .


and commit
> git commit -m ".gitignore is now working"

list up and sorting file(object) size in git / command

 use following cmd:

> git rev-list --objects --all | git cat-file --batch-check='%(objecttype) %(objectname) %(objectsize) %(rest)' | sed -n 's/^blob //p' | sort --numeric-sort --key=2 | cut -c 1-12,41- | $(command -v gnumfmt || echo numfmt) --field=2 --to=iec-i --suffix=B --padding=7 --round=nearest

get YouTube video url from channel name, python youtube-dl library

 

install youtube-dl package first.

pip install YouTube-dl

<code>

import subprocess

direct_output = subprocess.check_output('youtube-dl --get-id https://www.youtube.com/channel/UCAwWYtU_DEdRFxEHl9879dRYBfQ/videos --no-check-certificate', shell=True)

Lines = direct_output.decode()

idv = Lines.split('\n')

play_url_list = []

for idv in Lines.split('\n'):

if idv == '':

continue

print(idv)

play_url_list.append( 'https://www.youtube.com/watch?v={}'.format(idv) )

</code>

Thank you.