Python

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概要

show directory has python script

initialize when import modules

読み込むmodule名と実行ファイル名が同一の場合エラーが起きるので注意

開発環境

Class

By describing "class: Meta", you can define something that is not defined in forms.ModelForm.

code: (python)

class MessageForm(forms.ModelForm):

class Meta:

model = Message

class CreateGroupForm(forms.Form):

group_name = forms.CharField(max_length=50)

Methods

Special methods

init

str

bool

...

For str etc., when the function str () is called, you can specify the value to return as follows.

code: (python)

class User():

def __init__(self, name="", age=0):

self.name = name

self.age = age

def say_hello(self):

print("Hello, my name is " + self.name)

def __str__(self):

return "name:" + self.name + " age:" + str(self.age)

def __bool__(self):

return True

user = User("hoge", 20)

str(user)

# 'name:hoge age:20'

bool(user)

# True

Modules

future

apply to ver2,3

code: (python)

from __future__ import division, print_function, absolute_import, unicode_literals

Jupiter

convert notebook to html

code:bash

notebook=notebook.ipynb

jupyter nbconvert --to html ${notebook}

run notebook

code:bash

jupyter notebook --ip=* --no-browser

Julia

inspect

code: (python)

import inspect

import requests

inspect.getsource(requests.get)

itertools

vars

code: (python)

vars(obj)

Property

Samples

True == 1, False == 0になる

code:python

print(True + 8)

> 9

print(False + 2)

> 2

Reference