DEV Community: Hiro Takkii

Change faker depending on the value of FuzzyChoice

Hiro Takkii — Sun, 29 May 2022 05:49:11 +0000

I use factory_bot and faker with Django.

I want to create User with random gender, and also name related to the gender.(Of course, name does not define gender.)

To do so, I use FuzzyChoices and factory.lazy_attribute

from django.contrib.auth import get_user_model

import factory
from accounts.models import Gender
from factory import fuzzy
from faker import Faker


class UserFactory(factory.django.DjangoModelFactory):
    class Meta:
        model = UserModel

    gender = fuzzy.FuzzyChoice([Gender.FEMALE, Gender.MALE])

    @factory.lazy_attribute
    def name(self):
        locale = "ja_JP"
        if self.gender == Gender.FEMALE:
            return Faker(locale).name_female()
        else:
            return Faker(locale).name_male()

Thanks.

Reading Note: A philosophy of Software Design Chapter 1

Hiro Takkii — Sat, 19 Mar 2022 12:46:06 +0000

Recently, I read A philosophy of Software Design with friends.
In this article, I write a reading note about it.

Chapter1 Introduction( It's all about complexity)

There is a strong relationship between understanding the systems and writing software.
The more features you develop, the more it becomes complicated.
So complexity increases inevitably over the life of any program.

There are two general approaches to fighting complexity.
The first is to eliminate complexity by making code more straightforward and apparent.
The second is to encapsulate complexity to work on a system without being exposed to all its complexity at once. (modular design)

This chapter introduced waterfall model and agile development.

This book has two goals.
The first is to describe the nature of software complexity.
The second is to present techniques to minimize complexity.

1.1 How to use this book

Many of the design principles described here are abstract. This book may not be sufficient by itself to learn how to apply the principles.
The best way to use this is in conjunction with code reviews.

One of the best ways to improve design skills is to learn to recognize red flags. Red flags mean the signs that a piece of code is probably more complicated than it needs to be.

Even if you learn design ideas, you must use them with moderation and discretion because if you take them to their extreme, you will probably end up in the wrong place.

I want to introduce chapter 2 of this book.
Thanks.

pyenv install 3.8.2 BUILD FAILED (OS X 11.5.2 using python-build 20180424)

Hiro Takkii — Sat, 12 Feb 2022 11:45:24 +0000

Introduction

Following command failed.

❯ pyenv install 3.8.2
python-build: use openssl@1.1 from homebrew
python-build: use readline from homebrew
Installing Python-3.8.2...
python-build: use readline from homebrew
python-build: use zlib from xcode sdk

BUILD FAILED (OS X 11.5.2 using python-build 20180424)

Inspect or clean up the working tree at /var/folders/96/vjhghky10417fblgh4m1ltcw0000gn/T/python-build.20220212200129.83880
Results logged to /var/folders/96/vjhghky10417fblgh4m1ltcw0000gn/T/python-build.20220212200129.83880.log

Last 10 log lines:
                                                     ^
clang -c -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include   -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include   -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration  -I./Include/internal  -I. -I./Include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/hiro_takkii/.pyenv/versions/3.8.2/include -I/usr/local/opt/zlib/include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/hiro_takkii/.pyenv/versions/3.8.2/include -I/usr/local/opt/zlib/include  -DPy_BUILD_CORE -o Modules/gcmodule.o Modules/gcmodule.c
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include   -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include   -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration  -I./Include/internal  -I. -I./Include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/hiro_takkii/.pyenv/versions/3.8.2/include -I/usr/local/opt/zlib/include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/hiro_takkii/.pyenv/versions/3.8.2/include -I/usr/local/opt/zlib/include  -DPy_BUILD_CORE_BUILTIN  -DPy_BUILD_CORE_BUILTIN -I./Include/internal -c ./Modules/posixmodule.c -o Modules/posixmodule.o
./Modules/posixmodule.c:9197:15: error: implicit declaration of function 'sendfile' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        ret = sendfile(in, out, offset, &sbytes, &sf, flags);
              ^
1 error generated.
make: *** [Modules/posixmodule.o] Error 1
make: *** Waiting for unfinished jobs....
1 warning generated.

Solution

You can install with patch-flag.

> Install with the --patch flag
pyenv install --patch 3.8.2 < <(curl -sSL https://github.com/python/cpython/commit/8ea6353.patch)

python-build: use openssl@1.1 from homebrew
python-build: use readline from homebrew
Installing Python-3.8.2...
patching file Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst
patching file configure
Hunk #1 succeeded at 3394 (offset -32 lines).
patching file configure.ac
Hunk #1 succeeded at 498 (offset -12 lines).
python-build: use readline from homebrew
python-build: use zlib from xcode sdk

Installed Python-3.8.2 to /Users/hiro_takkii/.pyenv/versions/3.8.2

Thanks.

Reference

Unable to build Python on macOS Big Sur with Xcode 12 beta

How to create simple chrome extension

Hiro Takkii — Thu, 10 Feb 2022 06:51:51 +0000

I am developing a notepad application by personal development. In the process, I needed to create a chrome extension.
So in this post, I want to introduce the way to develop a simple chrome extension.

Result

In this case, the extension shows an alert message when you visit *.google.com.

The codes are Here.

What you need

You have to create only two files; manifest.json and show_alert.js.

manifest.json

Every extension needs manifest.json, which provides essential information. (ref )This time the content of it is as follows.

{
  "name": "Alert Sample",
  "description": "Chrome Extension Alert Sample",
  "version": "1.0.0",
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": ["*://*.google.com/*"],
      "js": ["show_alert.js"]
    }
  ]
}

manifest_version must be set to 2 or 3 now. (ref)

When you want to automatically run a script on some site, it is good to use content_scripts. (ref)
You can specify sites by matches consisting of scheme, host, and path. (ref)

Injected scripts into matching pages can be specified by js.

I omitted it this time, but other settings such as extension icon settings are also available in manifest.json.

show_alert.js

This contains a simple alert script like this.

window.alert("You visit 'google.com'.");

How to load the extension

After you create manifest.json and show_alert.js, you can load it in your chrome browser.

Visit chrome://extensions/ and push Load unpacked button (if it does not show, you have to turn on Developer mode).

Select the directory contains two files.
After that, alert Sample is displayed in Extensions.

When you visit "*://*.google.com/*" an alert message is displayed.

Summary

I introduced the way to create a simple chrome extension.
I'd like to explain a little more complicated processing in the future.
Thanks.

Reference

Japanese: Chrome拡張の作り方 (超概要)

DEV Community: Hiro Takkii

Change faker depending on the value of FuzzyChoice

Reading Note: A philosophy of Software Design Chapter 1

Chapter1 Introduction( It's all about complexity)

1.1 How to use this book

Next

pyenv install 3.8.2 BUILD FAILED (OS X 11.5.2 using python-build 20180424)

Introduction

Solution

Reference

How to create simple chrome extension

Result

What you need

manifest.json

show_alert.js

How to load the extension

Summary

Reference