Using Vue Variable in Jinja Python Flask

- Using {% raw %} directive
ex.

<div id="app">
{% raw %}
{{ var_from_vue }}
{% endraw %}
</div>

- Using Vue delemiters in Vue Instant
ex.

var app = new Vue({
    el: '#app',
    data: {
        v1: 'variable 1'
    },
    delimiters: ['[[', ']]'] 
})

- Custom Directive in Python Flask Jinja
ex.

app = Flask(__name__)

jinja_options = app.jinja_options.copy()
jinja.options.update(dict(
    variable_start_string='[[',
    variable_end_string=']]'
))
app.jinja_options = jinja_options

Connnet Terminal Serial RS232 on mac

screen -L  /dev/cu.UC-232AC 96000 -L

How to Caching Post Requests to redis Server in Python Flask, Redis Using Decorators

from flask import Flask, jsonify, request
from functools import wraps
import redis
import json

r = redis.Redis('__ip_address_redis_server__')
cache_time = 10

def xcaching(f):
    @wraps(f)
    def decor(*args, **kwargs):
        check = request.get_json()
        get_from_redis = r.get(str(check))

        if get_from_redis:
            data = get_from_redis.decode('utf-8')
            ret = json.loads(data)
            r.expire(str(check), cache_time)
            return jsonify(ret)

        ret = f(*args, **kwargs)

        cache_to_redis = ret.get_data()
        r.set(str(check), cache_to_redis ex=cache_time)

        return ret
    return decor


@app.route('/search', methods=['POST'])
@xcaching
def main():
req = request.get_json()
ret = call_api_function(req)
return jsonify(ret)

'__repr__' example

class TestClass:
    def __init__(self, a, b):
        self.a = a
        self.b = b

    def __repr__(self):
        return '{self.__class__.__name__}({self.a}, {self.b})'.format(self=self)

Convert dictionary 'key' in list to lowercase (python3)

Using List Comprehension and Dictionary Comprehension
>>> rs = [{'ABC': '123', 'DEF': '456'}]
>>> ret = [{k.lower():v for k,v in i.items()} for i in rs]
>>> ret
>>> [{'abc': '123', 'def': '456'}]

Using Lambda Function
>>> rs = list(map((lambda i: { k.lower(): v for k,v in i.items()}), rs))

How to set TimeZone in Linux Docker Container

#How to set TimeZone in Linux Docker Container

```
apk add tzdata
```
ex:
Dockerfile
```
from python:3.7-alpine
RUN apk add tzdata
ENV TZ=Asia/Bangkok
CMD xxxx
```

#TimeZone in slim and Ubuntu Linux Docker Container

ex:
Dockerfile
```
from python
ENV TZ=Asia/Bangkok
CMD xxxx
```

ex:
Run Container (slim or full linux images)
```
docker run --name container-name -e 'TZ=Asia/Bangkok' python
```

SET TimeZone on Ubuntu19 with Command Line

:Find Current TimeZone
$ timedatectl list-timezones | grep -i [zone]

ex:
$ timedatectl list-timezones | grep -i europe

:Remove link
$ sudo unlink /etc/localtime

:Set new TimeZone
sudo ln -s /usr/share/zoneinfo/[Zone/TimeZone] /etc/localtime

ex: 
sudo ln -s /usr/share/zoneinfo/Asia/Bangkok /etc/localtime