https://spyhce.com/blog/understanding-new-and-init

#python27 #python3 #__init__ #__new__ #old_style #new_style #OOP #class #super

👆 Great library for creating python scripts for server maintenance. Read on.

http://click.palletsprojects.com/en/7.x/commands/

#python #click

What do you think the best way is to extract active users from the list below in Python?

users = [
    {
       "email":"ali@gmail.com",
       "is_active":True
    },
    {
       "email":"mohi@gmail.com",
       "is_active":True
    },
    {
       "email":"reza@live.com",
       "is_active":False
    },
    {
       "email":"marziyeh@gmail.com",
       "is_active":False
    }
 ]

Waiting for the answers :)

#python #question

active_users = filter(lambda x:x['is_active'], users)

#python #filter #lambda

#python #generator #coroutine #next #StopIteration

In axigen mail server you can set a filter that if sender email address (from) has a specific text using regexp then redirect it to
another mailbox:

Security and Filtering -> Acceptance and Routing -> Advanced settings -> Add acceptance / routing rule

Phew! Now in Conditions section open combo box and select Email under Recipient. Click Add condition. A text box is appeared now which you can select Regexp from the combo box and enter your regex like:

.*SpecificSender.*

Now in actions section in name enter the mail address you want to receive emails in and in Folder text box enter INBOX.

This is it.

#mail #mail_server #axigen #filter #routing

In MongoDB you can compare one field to another using $expr:

db.users.find({ $expr: { $eq: ["$created_at", "$updated_at"] } })

Here we get users that their updated_at field is equal to created_at field, here it means that user has not yet updated his profile.

#mongodb #mongo #expr #find

What is filters in Python Logging and what we can do with it?

Filter is a way to tell logger not to log or to log something. Let's say you print sensitive data in a core module that can also handle passwords. Here you don't want to record user passwords in you logs! Do you?!

class NoPasswordFilter(logging.Filter):
     def filter(self, record):
         return not record.getMessage().startswith('password')

 logger.addFilter(NoPasswordFilter())

The above method will not log lines which start with password. You can use regex to find your template in you logs and return false
to not record them or mask the password part by chaning the the log using:

record.msg

Just get your message using the above line and replace it with something you want.

#python #logging #filter

If you are using logging module:

logging.getLogger(__name__).addFilter(NoPasswordFilter())

# How to merge two dictionaries
# in Python 3.5+

>>> x = {'a': 1, 'b': 2}
>>> y = {'b': 3, 'c': 4}

>>> z = {**x, **y}

>>> z
{'c': 4, 'a': 1, 'b': 3}

# In Python 2.x you could
# use this:
>>> z = dict(x, **y)
>>> z
{'a': 1, 'c': 4, 'b': 3}

# In these examples, Python merges dictionary keys
# in the order listed in the expression, overwriting
# duplicates from left to right.

Usually when you buy something, you're asked whether your credit card number, phone number or answer to your most secret question is still correct. However, since someone could look over your shoulder, you don't want that shown on your screen. Instead, we mask it.

Your task is to write a function maskify, which changes all but the last four characters into '#'.


Examples:

maskify("4556364607935616") == "############5616"
maskify(     "64607935616") ==      "#######5616"
maskify(               "1") ==                "1"
maskify(                "") ==                 ""

# "What was the name of your first pet?"
maskify("Skippy")                                   == "##ippy"
maskify("Nananananananananananananananana Batman!") == "####################################man!"

#python #maskify

# return masked string
def maskify(cc):
  return len(cc[:-4]) * '#' + cc[-4:]

#python #maskify #solution

# How to sort a Python dict by value
# (== get a representation sorted by value)

>>> xs = {'a': 4, 'b': 3, 'c': 2, 'd': 1}

>>> sorted(xs.items(), key=lambda x: x[1])
[('d', 1), ('c', 2), ('b', 3), ('a', 4)]

# Or:

>>> import operator
>>> sorted(xs.items(), key=operator.itemgetter(1))
[('d', 1), ('c', 2), ('b', 3), ('a', 4)]

#python

https://projects.lukehaas.me/css-loaders/

#css #loaders #loading #animation

Python dictionary:

# The get() method on dicts
# and its "default" argument

name_for_userid = {
    382: "Alice",
    590: "Bob",
    951: "Dilbert",
}

def greeting(userid):
    return "Hi %s!" % name_for_userid.get(userid, "there")

>>> greeting(382)
"Hi Alice!"

>>> greeting(333333)
"Hi there!"

#pytricks

https://workplace.stackexchange.com/questions/125610/is-it-okay-to-refuse-entirely-to-answer-desired-salary-question

#workplace #salary

Complete the method/function so that it converts dash/underscore delimited words into camel casing. The first word within the output should be capitalized only if the original word was capitalized.

Examples:

to_camel_case("the-stealth-warrior") # returns "theStealthWarrior"
 to_camel_case("The_Stealth_Warrior") # returns "TheStealthWarrior"

#python #codewars

name = 'Is-this-a-tough_question?'
 name[0] + name.title().translate(None, '-_')[1:]

OR:

name = 'Is-this-a-tough_question?'
 name.title().replace('-', '').replace('_', '')

#python #solution

Write a function, which takes a non-negative integer (seconds) as input and returns the time in a human-readable format (HH:MM:SS)

HH = hours, padded to 2 digits, range: 00 - 99
 MM = minutes, padded to 2 digits, range: 00 - 59
 SS = seconds, padded to 2 digits, range: 00 - 59

#python #codewars #datetime