- Phyton data universal database install#
- Phyton data universal database driver#
- Phyton data universal database archive#
- Phyton data universal database download#
Setting BRIGHTWAY2_DIR in a virtual environment # This is not recommended for use by beginners, but if you have multiple or non-standard installations of Brightway it might be useful. Brightway will raise an OSError if this is not a writable directory. You can specify a custom data directory path by setting the environment variable BRIGHTWAY2_DIR. On OS X: /Users//Library/Application Support/Brightway2 On Windows: C:\Documents and Settings\\Application Data\Local Settings\pylca\Brightway2 Similarly, you can find the logs directory with the command projects.logs_dir.īrightway2 uses the appdirs library to select an appropriate, platform-specific path, namely: You can find the current project data directory with the command projects.dir everything will be stored in this folder or a subdirectory. Save any data object (like a Database or Method) to a BW2Package using BW2Package.export_objs.Įxport a database to Excel using _lci_activities.
Phyton data universal database archive#
Both functions return the filepath of the created archive file. You can save a snapshot of entire project directory with backup_data_directory, or save a single project with backup_project_directory. How do I backup my data? #Įach project is just a subdirectory (you can get the path using projects.dir), and this can be backed up using any normal tools, including cloud backups like Dropbox. But be careful that you only do this in a single Python kernel. If you are sure that it is safe to write data, then you can trick the projects object into allowing writes - just set projects.read_only = False. In extreme cases, it may be necessary to manually delete the lock file or restart your computer. To be safe, you should always manually shut down each Python shell and each Jupyter notebook. You can run into problems if a Python kernel is not shut down properly. The problem is easy to understand - if two kernels load the metadata into memory, and each make a change somewhere, then whoever saves the latest will overwrite the changes of the other. This locking was introduced because people were having trouble with multiple people working on the same project and getting conflicts or even corruption in the metadata. If a second Python kernel switches to the same project, it will load the latest saved version of the metadata, and will then fail to acquire the lock, so will be set to read-only mode (i.e. It will then try to acquire a lock that gives it the exclusive right to change this metadata in the future. More specifically, when you use t_current to switch to a new project, Brightway will read a bunch of metadata about things like project databases and LCIA methods into memory. How do I resolve errors about read-only projects? #īrightway2 uses the fasteners library to create lock files that conflicts in written data. If your import process is taking a long time or a lot of memory, double check to make sure you have the right version.
Phyton data universal database download#
You want to download and import ecoinvent 3.3_xxx_ecoSpold02.7z. Data management # Which ecoinvent file should I download? #Įcoinvent makes several versions of each system model available:Įcoinvent 3.3_xxx_lcia-cumulated-matrices_xls.7zĮcoinvent 3.3_xxx_lci-cumulated-matrices_xls.7z Verify that the databases and their collations are returned, and then close the command window.See also the discussion on the Python wiki and a long StackOverflow discussion. With nnect('DRIVER='+driver+' SERVER=tcp:'+server+' PORT=1433 DATABASE='+database+' UID='+username+' PWD='+ password) as conn:Ĭursor.execute("SELECT TOP 3 name, collation_name FROM sys.databases")Īt a command prompt, run the following command: python sqltest.py Get the connection information from the prerequisites section and substitute your own values for, ,, and. In a text editor, create a new file named sqltest.py.Īdd the following code. To further explore Python and the database in Azure SQL Database, see Azure SQL Database libraries for Python, the pyodbc repository, and a pyodbc sample.
Phyton data universal database install#
Use sudo apt-get install python python-pip gcc g++ build-essential. Install Python and other required packages This will also install install Homebrew and Python.Īlthough the linked article references SQL Server, these steps are also applicable to Azure SQL Database, Azure SQL Managed Instance, and Azure Synapse Analytics.Ĭonfigure an environment for pyodbc Python developmentĬonfigure an environment for pyodbc Python development. Use steps 1.2, 1.3, and 2.1 in create Python apps using SQL Server on macOS.
Phyton data universal database driver#
Install the ODBC driver, SQLCMD, and the Python driver for SQL Server You can use one of these quickstarts to create and then configure a database: Action
PrerequisitesĪn Azure account with an active subscription. In this quickstart, you use Python to connect to Azure SQL Database, Azure SQL Managed Instance, or Synapse SQL database and use T-SQL statements to query data.
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