小编Kra*_*mar的帖子

我复制了一个URL,例如git://gitorious.org/openhatch/oh-mainline.git.我想使用键盘快捷键将其粘贴到终端中.

请不要说"右击并粘贴".

我试图获取模板中所有变量和块的列表.我不想创建自己的解析器来查找变量.我尝试使用以下代码段.

from jinja2 import Environment, PackageLoader
env = Environment(loader=PackageLoader('gummi', 'templates'))
template = env.get_template('chat.html')

template.blocks 是键是块的dict,如何获取块内的所有变量？

sys和os.syspython有什么区别？我看到许多项目sys在导入时使用os.当我尝试dir(sys)并且dir(os.sys)它们具有相同的功能并且它们的输出相同时.

我经常看到代码使用sys.exit这样,而不是使用os.sys.exit,但两者都做同样的事情.

import os   
import sys    
sys.exit()

我有oauth secret和oauth key在client表中.现在我将它们移动到oauth credentials将在迁移期间创建的表.Alembic生成以下架构进行升级.

from myapp.models import Client, ClientCredential
from alembic import op
import sqlalchemy as sa


def upgrade():
### commands auto generated by Alembic - please adjust! ###
    op.create_table('client_credential',
    sa.Column('id', sa.Integer(), nullable=False),
    sa.Column('created_at', sa.DateTime(), nullable=False),
    sa.Column('updated_at', sa.DateTime(), nullable=False),
    sa.Column('client_id', sa.Integer(), nullable=False),
    sa.Column('key', sa.String(length=22), nullable=False),
    sa.Column('secret', sa.String(length=44), nullable=False),
    sa.Column('is_active', sa.Boolean(), nullable=False),
    sa.ForeignKeyConstraint(['client_id'], ['client.id'], ),
    sa.PrimaryKeyConstraint('id'),
    sa.UniqueConstraint('key')
   )
   # Here I need to copy data from table A to newly created Table.
   # …

我正在寻找替代方案Moodle.
我搜索并发现pinax-lms-demo,这是基于Django的;
而Astra这是基于Rails的,但两者都是空的回购...

我需要一个具有以下功能的LMS:

1. 创造阶级
2. 分配教师
3. 上传资料
4. 参加测验
5. 论坛
6. SCORM
7. 聊

我花了一个多月的时间使用Moodle并成为开发人员,我觉得我不应该使用它...

TF Map功能支持并行调用.我看到没有改进传递num_parallel_calls给地图.使用num_parallel_calls=1和num_parallel_calls=10,性能运行时间没有改善.这是一个简单的代码

import time
def test_two_custom_function_parallelism(num_parallel_calls=1, batch=False, 
    batch_size=1, repeat=1, num_iterations=10):
    tf.reset_default_graph()
    start = time.time()
    dataset_x = tf.data.Dataset.range(1000).map(lambda x: tf.py_func(
        squarer, [x], [tf.int64]), 
        num_parallel_calls=num_parallel_calls).repeat(repeat)
    if batch:
        dataset_x = dataset_x.batch(batch_size)
    dataset_y = tf.data.Dataset.range(1000).map(lambda x: tf.py_func(
       squarer, [x], [tf.int64]), num_parallel_calls=num_parallel_calls).repeat(repeat)
    if batch:
        dataset_y = dataset_x.batch(batch_size)
        X = dataset_x.make_one_shot_iterator().get_next()
        Y = dataset_x.make_one_shot_iterator().get_next()

    with tf.Session() as sess:
        sess.run(tf.global_variables_initializer())
        i = 0
        while True:
            try:
                res = sess.run([X, Y])
                i += 1
                if i == num_iterations:
                    break
            except tf.errors.OutOfRangeError …

我有一个表students与现场ward_id,我必须创建一个名为表guardian_users与领域id,ward_id,email,guardian_id,hashed_password等.

现在我必须添加约束foreign key.学生中的任何更新/删除/编辑/插入都应对guardian_users产生相同的影响.

我怎么能在rails 2.3.5中做到这一点？

表学生存在但其他人尚不存在.

class Animal(object):
    def eat(self):
        print("I eat all")

class C(object):
    def eat(self):
        print("I too eat")

class Wolf(C, Animal):
    def eat(self):
        print("I am Non Veg")
        super(Wolf, self).eat()
        Animal.eat(self)

w = Wolf()
w.eat()

我正在学习python中的多重继承,我想使用方法从派生类访问Animal和方法.Ceatsuper

super内部调用C 类方法的默认调用eat,但调用Animal我使用的类方法.Animal.eat(self)我的问题是如何Animal使用super方法调用类方法.

这是示例代码

from typing import Dict, Union, Tuple


def select_range(data: Dict[str, Union[str, int]]) -> Tuple[int, int]:
    if data['start'] and data['end']:
        return data['start'], data['end']
    return 1, 1

select_range({})

Mypy输出:

mypy different_return.py
different_return.py:6: error: Incompatible return value type (got 
"Tuple[Union[str, int], Union[str, int]]", expected "Tuple[int, int]")

即使其中一个字典值是int,mypy也无法推断出这一点.

我在一个ror项目中运行bundle,导致跟随错误.

我无法理解缺少的东西.

[root@kracekumar canvas-lms]# bundle
Fetching source index for http://rubygems.org/
Using rake (0.8.7) 
Using abstract (1.0.0) 
Installing activesupport (2.3.11) 
Using rack (1.1.0) 
Installing actionpack (2.3.11) 
Installing actionmailer (2.3.11) 
Installing activerecord (2.3.11) 
Installing activeresource (2.3.11) 
Installing authlogic (2.1.3) 
Using builder (2.1.2) 
Using mime-types (1.16) 
Installing xml-simple (1.0.12) 
Installing aws-s3 (0.6.2) 
Installing bluecloth (2.0.10) with native extensions 
/usr/lib/ruby/site_ruby/1.8/rubygems/installer.rb:481:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

/usr/bin/ruby extconf.rb 
mkmf.rb can't find header files for ruby at /usr/lib/ruby/ruby.h


Gem files will remain …

#online_exam_controller
class OnlineExamController < ApplicationController
   def index
    @user=current_user
    @employee=Employee.find_by_employee_number(@user.username)
    # flash[:notice]="#{@employee.id}"
    @subjects=EmployeesSubject.find_all_by_employee_id(@employee.id)
    @subject_name=[]
    @batch_details=[]
    @display_details=[[]]
    @count=0
    for @t in @subjects
     @subject_name[@count]=Subject.find(@t.subject_id,:select=>'name,code,batch_id')
     @batch_details[@count]=Batch.find(@subject_name[@count].batch_id,:select =>'name')
     @display_details[@count][0]=@subject_name[@count].name+" "+@batch_details[@count].name
     @display_details[@count][1]=@t.subject_id
     @count+=1
    end
   end
   def show
    if params[:subject_id]==''
     @question_type=[]
    else
     @question_type=['multiple_choice','fill_ups','matches','descriptive']
     @subject_id=params[:subject_id]

   end
   respond_to do |format|
   format.js {render:action=>'show' }
   end
  end
  def new_multiple_choice
   @quiz=MultipleChoiceQuestion.new
   @subject=Subject.find params[:id] if request.xhr? and params[:id]
   respond_to do |format|
    format.js {render :action => 'new_multiple_choice'}
   end
  end
 end
#index.html.erb
<div id="content-header">
<img src="/images/show_settings.png" alt="Subjects"/>
<h1>Subjects</h1>
<h3>Home</h3>
 <div id="app-back-button">
 <%= link_to_function image_tag("/images/buttons/back.png",:border => …