python pil change dpi without save file

 

look at the code! ^^

..

#load image

tif_path = './input_img.tif'

#open image

pil_image = Image.open(tif_path)

#change dpi in memory

temp_mem_file = BytesIO()

page.save(temp_mem_file, format='png', dpi=(100,100))

#save it to pil

temp_mem_file.seek(0)

pil_image = Image.open(temp_mem_file)

#do it someting

#..

#save file

pil_image.save('./output.png')

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#study.marearts.com

..

Thank you.

convert numpy.ndarray object to float

*Here is object dtype numpy.ndarray

print(oneD_pt.dtype, type(oneD_pt), oneD_pt)
> object <class 'numpy.ndarray'> [3 2 1 2 2] 

* convert float dtype numpy.ndarray

oneD_pt=oneD_pt.astype('float')

print(oneD_pt.dtype, type(oneD_pt), oneD_pt)

> float64 <class 'numpy.ndarray'> [3. 2. 1. 2. 2.]

thank you.

python argparse simple example

 

It's useful to save hyper parameter for machine learning

import argparse

paser = argparse.ArgumentParser()

args = paser.parse_args("")

args.batch_size=10

args.epoch=10

Thank you.

vs code server failed to start

try to kill the server which you want access and try to access again

1 .ctrl-shift-p and choose:
2. Remote-SSH: kill VS Code Server on Host...

3. access remote again

Thank you.

nginx.conf, set to accept last path and poxy it.

 

ex)

www.xxx.yy/aaa/ping

www.xxx.yy/bbb/ping

Those urls will go to /ping proxy.

location ~ ^/.*/(ping|invocations) {

rewrite ^/.*/(.*)$ /$1 last;

proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

proxy_set_header Host $http_host;

proxy_redirect off;

proxy_pass http://gunicorn/$1;

}

TensorFlow cuda version compatible

 

AWS dynamoDB safe searching way, search item by scan and get it by paginator.

 refer to follow code

--

import boto3

dynamo_client = boto3.client('dynamodb')

def Search_Item(TABLE_NAME, uid):

paginator = dynamo_client.get_paginator('scan')

operation_parameters = {

'TableName': TABLE_NAME,

'FilterExpression': 'UID = :search',

'ExpressionAttributeValues': {

':search': {'S': uid},

}

}

page_iterator = paginator.paginate(**operation_parameters)

return page_iterator

UID_list = []

TABLE_NAME ='example_Table'

UID ='example_uid'

page_iterator = Search_Item(TABLE_NAME, UID)

for page in page_iterator:

for item in page['Items']:

UID_list.append(item['UID']['S'])

--

Thank you.

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