我在MacOS上。 我正在尝试为自己编写一个ETL模块,但我被这样一个事实困扰:我似乎无法让SQLAlchemy将其自身安装到我的Python3.7目录中。它在2.7文件夹中安装得很好,即使我指定: sudo pip3 install sqlalchemy 这快把我逼疯了!在这件事上,我很想得到任何建议。 下面是我正在做的事情: User-MacBook-Pro:2.7 User$ pip3 install sqlalchemy --user
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020
Ubuntu 12.04Apache 2.2.22
pip已经停止在我的ubuntu服务器上工作,并在我尝试下载任何东西时显示以下错误。
$ sudo pip install SQLAlchemy
Downloading/unpacking SQLAlchemy
Cannot fetch index base URL http://pypi.python.org/simple/
Could not find any downloads that satisfy the requirement SQLAlchemy
No distributions at all found for SQ
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\Anirudh\Documents\flask_app\connecting_to_database\application.py", line 2, in <module>
from flask_sqlalchemy import SQLAlchemy
File "C:\Users\Anirudh\AppData\Local\P
我试图使用模块'wrds‘中的'WRDS.Connection()’函数连接到'wrds‘数据库,输入用户名和密码,但它建议我设置一个.pgfile并引发错误。
import wrds
conn = wrds.Connection()
Enter your WRDS username [veggiesong]:huhuhuhu
Enter your password:
WRDS recommends setting up a .pgpass file.
You can find more info here:
https://www.postgresql.org/doc
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Sequence, Integer, Float, String, Boolean, ForeignKey, TIMESTAMP, Enum
import datetime
from os import urandom
from binascii import hexlify
from hash
即使在安装flask-sqlachemy之后,我也无法导入flask_sqlalchemy
from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy
# ^this line shows error ImportError: "flask_sqlalchemy" could not be resolved
app = Flask(__name__)
@app.route('/')
def index():
return render_templa
update-alternativesunder /usr/bin/ i有python2.7/ python 3/python3.8和python3.9/。
==>现在面临的问题是,当我使用pip install sqlalchemy安装sqlalchemy时,它的版本是1.3.12,这与熊猫有兼容性问题,因为它需要1.4.0版本。
>>>pip install --upgrade sqlalchemy
>>> Defaulting to user installation because normal site-packages is not wri
>python
Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from sqlalchemy import create_engine
>>> engine = create_engin
我正在使用flask sqlalchemy。但是,在命令行中调试时,我发现session.execute返回错误。
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/orm/scoping.py", line 149, in do
return getattr(self.registry(), name)(*args, *
我一直试图将我的aws数据库实例连接到我下载的一个烧瓶应用程序。我一直在跟踪,并使用这个github上的烧瓶应用程序连接到数据库。我正确地设置了RDS服务器上的权限,并且一直在使用下面的代码连接到DB。
# edit the URI below to add your RDS password and your AWS URL
# The other elements are the same as used in the tutorial
# format: (user):(password)@(db_identifier).amazonaws.com:3306/(db_name)
SQL
今天,我尝试更改支持cloud composer环境的集群的节点类型,并切换到Ubuntu镜像而不是COS。为此,我向GKE集群添加了第二个节点池,然后删除了第一个节点池,并迁移了所有工作负载。
这会在airflow-sqlproxy日志中产生以下错误:
couldn't connect to "XXXXX:europe-west1:XXXXX": ensure that the Cloud SQL API is enabled for your project (https://console.cloud.google.com/flows/enableapi?apii
尝试使用以下导入运行文件:
from flask_sqlalchemy import sqlalchemy
from sqlalchemy import create_engine
from sqlalchemy.orm import scoped_session, sessionmaker
收到以下错误:
ImportError: No module named 'flask_sqlalchemy'
安装了SQLAlchemy。尽管如此,我还是尝试重新安装到将在其中使用它的目录中。我拿到了这个:
The directory '/Users/_/Library/Cach
我目前正在尝试将我的烧瓶应用程序部署到Heroku,但是在数据库初始化过程中遇到了一个错误。
这是我的models.py文件:
from app import app
from app import db
from werkzeug.security import generate_password_hash, check_password_hash
from sqlalchemy import create_engine, Column, Integer, String, Date, ForeignKey, event, Boolean, Table
from sqlalch
SQLAlchemy很好地记录了。
但是,当复制并粘贴该文档中的示例时,将子级添加到父级会引发KeyError,如以下代码所示。模型类100%地从文档中复制:
from sqlalchemy import Column, ForeignKey, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship
from sqlalchemy.schema import MetaData
Base = declarative_base(m