小编sma*_*art的帖子

我正在尝试使用SQLAlchemy ORM实现动态过滤.

我正在浏览StackOverflow并发现了非常类似的问题:SQLALchemy dynamic filter_by

它对我有用,但还不够.

所以,这是一些代码示例,我正在尝试写:

# engine - MySQL engine
session_maker = sessionmaker(bind=engine)
session = session_maker()

# my custom model
model = User

def get_query(session, filters):
    if type(filters) == tuple:
        query = session.query(model).filter(*filters)
    elif type(filters) == dict:
        query = session.query(model).filter(**filters)
    return query

然后我试图用非常相似的东西重用它:

filters = (User.name == 'Johny')
get_query(s, filters) # it works just fine

filters = {'name': 'Johny'}
get_query(s, filters)

第二次运行后,有一些问题:

TypeError: filter() got an unexpected keyword argument 'name'

当我试图改变我filters的时候:

filters = {User.name: 'Johny'} …

我有一些使用 aiohttp 的应用程序。

我将 POST 请求发送到适当的端点，例如：

POST mysite.com/someendpoind/

数据类似于：

{"param1": "value1", "param2": "value2", ..., "paramn": None}

然后在后端，我想在这个请求中添加一些额外的条件：

data = await request.json()
data["additional_conditional"] = True

但request.json()失败并出现错误：

[ERROR] Error handling request
Traceback (most recent call last):
File "/usr/local/lib/python3.5/dist-packages/aiohttp/web_protocol.py", line 422, in start
resp = yield from self._request_handler(request)
File "/usr/local/lib/python3.5/dist-packages/aiohttp/web.py", line 306, in _handle
resp = yield from handler(request)
File "/usr/local/lib/python3.5/dist-packages/aiohttp_session/__init__.py", line 129, in middleware
response = yield from handler(request)
File "/opt/bikeamp/auth/__init__.py", line 57, in wrapped
return (yield from f(request, user)) …

我正在尝试安装Flask-ACL:https: //mikeboers.github.io/Flask-ACL

$ pip search acl | grep -i flask

Flask-ACL (0.0.1) - Access control lists for Flask.
flask-miracle-acl (0.2) - The fabric between the Flask framework and Miracle ACL

Flask-Sandbox (0.1.0)- ACL Route controls for Flask
Flask-SimpleACL (1.2)- Simple ACL extension


$ pip install Flask-ACL

Collecting Flask-ACL
Could not find a version that satisfies the requirement Flask-ACL (from versions: )
No matching distribution found for Flask-ACL

这有什么不对？

PS Pip几分钟前升级了.

更新:

$ python --version
Python 2.7.3

我在virtualenv下运行它.

pip …

我正在尝试使用我的GitHub设置CodeDeploy,但我发现了一些问题.

我已经在政策service role文档中提到过了AWSCodeDeployRole.

在我的代码部署应用程序创建过程中,我遇到了一个问题:

Cannot assume role provided.

正如我所看到的,我的角色AWSCodeDeployRole拥有很多自动缩放权限,但我不希望这样:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "autoscaling:CompleteLifecycleAction",
        "autoscaling:DeleteLifecycleHook",
        "autoscaling:DescribeAutoScalingGroups",
        "autoscaling:DescribeLifecycleHooks",
        "autoscaling:PutLifecycleHook",
        "autoscaling:RecordLifecycleActionHeartbeat",
        "autoscaling:CreateAutoScalingGroup",
        "autoscaling:UpdateAutoScalingGroup",
        "autoscaling:EnableMetricsCollection",
        "autoscaling:DescribeAutoScalingGroups",
        "autoscaling:DescribePolicies",
        "autoscaling:DescribeScheduledActions",
        "autoscaling:DescribeNotificationConfigurations",
        "autoscaling:DescribeLifecycleHooks",
        "autoscaling:SuspendProcesses",
        "autoscaling:ResumeProcesses",
        "autoscaling:AttachLoadBalancers",
        "autoscaling:PutScalingPolicy",
        "autoscaling:PutScheduledUpdateGroupAction",
        "autoscaling:PutNotificationConfiguration",
        "autoscaling:PutLifecycleHook",
        "autoscaling:DescribeScalingActivities",
        "autoscaling:DeleteAutoScalingGroup",
        "ec2:DescribeInstances",
        "ec2:DescribeInstanceStatus",
        "ec2:TerminateInstances",
        "tag:GetTags",
        "tag:GetResources",
        "sns:Publish",
        "cloudwatch:DescribeAlarms",
        "elasticloadbalancing:DescribeLoadBalancers",
        "elasticloadbalancing:DescribeInstanceHealth",
        "elasticloadbalancing:RegisterInstancesWithLoadBalancer",
        "elasticloadbalancing:DeregisterInstancesFromLoadBalancer"
      ],
      "Resource": "*"
    }
  ]
}

在一些谷歌搜索期间,我发现CodeDeploy应用程序可能期望类似于:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "",
      "Effect": "Allow",
      "Principal": {
        "Service": [ …

我正在使用 Python 进行人脸识别。

我有以下代码：

from sklearn.externals import joblib
clf = joblib.load('model/svm.pkl')
pca = joblib.load('model/pca.pkl')
face_cascade = cv2.CascadeClassifier("classifier/haarcascade_frontalface_alt.xml")
webcam = cv2.VideoCapture(0)
ret, frame = webcam.read()
while ret:
    start = time()
    origin = frame
    gray = cv2.cvtColor(origin, cv2.COLOR_BGR2GRAY)
    cv2.equalizeHist(gray,gray)

    faces = face_cascade.detectMultiScale(
        origin,
        scaleFactor=1.1,
        minNeighbors=5,
        minSize=(30, 30),
        flags=cv2.cv.CV_HAAR_SCALE_IMAGE
    )
    for (x, y, w, h) in faces:
        cv2.rectangle(origin, (x, y), (x+w, y+h), (0, 255, 0), 2)
        face = gray[y:y+h , x:x+w]
        cv2.equalizeHist(face,face)

        face_to_predict = cv2.resize(face,(100, 100),interpolation = cv2.INTER_AREA)

        img = face_to_predict.ravel()
        principle_components = …

我有一个非常简单的问题,但我找不到答案.

我有一些字符串:

test-123

smart如果此字符串与我的条件完全匹配,我想要一些正则表达式进行验证.

我希望有一个像这样的字符串:

test-<number>

数字应包含数字上1到*的元素.

我正在尝试做这样的事情:

import re
correct_string = 'test-251'
wrong_string = 'test-123x'
regex = re.compile(r'test-\d+')
if regex.match(correct_string):
    print 'Matching correct string.'
if regex.match(wrong_string):
    print 'Matching wrong_string.'

所以,我可以看到两个消息(匹配正确和错误的字符串),但我真的希望只匹配正确的字符串.

此外,我试图使用search方法而不是match没有运气.

想法？

我有很多bash命令.其中一些因各种原因而失败.我想检查一些错误是否包含子字符串.

这是一个例子:

#!/bin/bash

if [[ $(cp nosuchfile /foobar) =~ "No such file" ]]; then
    echo "File does not exist. Please check your files and try again."
else
    echo "No match"
fi

当我运行它时,错误被打印到屏幕上,我得到"不匹配":

$ ./myscript
cp: cannot stat 'nosuchfile': No such file or directory
No match

相反,我希望捕获错误并符合我的条件:

$ ./myscript
File does not exist. Please check your files and try again.

如何正确匹配错误消息？

PS我找到了一些解决方案,您对此有何看法？

out=`cp file1 file2 2>&1`
if [[ $out =~ "No such file" ]]; then
    echo "File does not exist. Please …

我的项目结构如下所示：

package1/  # a lot of files, submodules here.
package2/  # a lot of files, submodules here.
package3/  # a lot of files, submodules here.
tests/
setup.py

我有一个setup.py类似的测试：

setup(
    name='MyPackage',
    packages=find_packages(exclude=['tests']),
    package_data={
        'package': ['./path/*.xsd'],
    },
    include_package_data=True,
    py_modules=['package1'],
    version=__version__,
    description='My description',
    classifiers=[
        'Programming Language :: Python :: 2.7',
        'Programming Language :: Python :: 3',
    ],
    zip_safe=False,
    author='Me',
    author_email='example@example.com',
    url='http://www.example.com/',
    keywords=['Keyword1', 'Keyword2'],
    scripts=['./script1.py', './script2.py'],
    install_requires=[
        'isodate',
        'pycurl',

    ],
    extras_require={':python_version < "3.0"': ['enum34', 'future']}
)

我按以下方式使用它：

python setup.py bdist_wheel -d . …

我正在使用私钥从我的 Docker 文件中的 Github 下载我的存储库。我有这样的事情：

RUN mkdir -p /root/.ssh && echo "$MY_PRIVATE_KEY" >/root/.ssh/id_rsa &&    chmod 0600 /root/.ssh/id_rsa &&    ssh-keyscan github.com >> /root/.ssh/known_hosts &&    cat /root/.ssh/known_hosts &&    ssh -vvv git@github.com &&    pip install git+ssh://git@github.com/my_project.git@v1.0.0 &&    rm /root/.ssh/id_rsa

哪里MY_PRIVATE_KEY有争论。我无法重新创建此密钥。我的问题是在连接过程中出现以下错误： key_load_private_type: incorrect passphrase supplied to decrypt private key

是否有可能以某种方式跳过密码？

我正在尝试通过AWS从github存储库设置部署。

在这些步骤中，我遇到了一个问题：

http://docs.aws.amazon.com/codedeploy/latest/userguide/codedeploy-agent-operations-install.html#codedeploy-agent-operations-install-linux

该命令失败：

wget https://bucket-name.s3.amazonaws.com/latest/install

它返回：

[ec2-user@ip-172-31-11-55 ~]$ wget https://bucket-name.s3.amazonaws.com/latest/install
--2017-06-04 10:18:18--  https://bucket-name.s3.amazonaws.com/latest/install
Resolving bucket-name.s3.amazonaws.com (bucket-name.s3.amazonaws.com)... 54.231.114.146
Connecting to bucket-name.s3.amazonaws.com (bucket-name.s3.amazonaws.com)|54.231.114.146|:443... connected.
HTTP request sent, awaiting response... 403 Forbidden
2017-06-04 10:18:18 ERROR 403: Forbidden.

我已为我的实例允许所有端口用于入站/出站流量。

怎么了？

我正在尝试在我的主机系统中使用 MySQL docker 容器来使安装和配置过程更加轻松快捷。

所以，我从以下位置提取了一个图像：https : //hub.docker.com/r/mysql/mysql-server/

然后基于此图像启动容器..

容器启动正常，但我无法从我的主机系统连接到这个数据库（如果我尝试从容器连接，一切正常）。它失败并显示一条消息：

ERROR 1130 (HY000): Host '<here goes my IP>' is not allowed to connect to this MySQL server

所以，据我所知，我的root用户没有足够的权限。

我已经进入了我的容器：

docker exec -it mysql bash

连接到数据库：

mysql -uroot -ppassword

更新了我的 root 用户的权限：

use mysql;
UPDATE user SET Host="%" WHERE User='root';

更新好了

比我决定以某种方式保存我更新的图像......我找到了这个指南：

http://docs.oracle.com/cd/E52668_01/E75728/html/section_c5q_n2z_fp.html

执行后：

docker stop mysql
docker commit -m "Fixed permissions for root user" -a "Few words about author" `docker ps -l -q` myrepo/mysql:v1
docker rm mysql
docker …