psycopg2

问题 Context I just get into trouble while trying to do some I/O operations on some databases from a Python3 script. When I want to connect to a database, I habitually use psycopg2 in order to handle the connections and cursors. My data are usually stored as Pandas DataFrames and/or GeoPandas's equivalent GeoDataFrames. Difficulties In order to read data from a database table; Using Pandas: I can rely on its .read_sql() methods which takes as a parameter con , as stated in the doc: con :

问题 Context I just get into trouble while trying to do some I/O operations on some databases from a Python3 script. When I want to connect to a database, I habitually use psycopg2 in order to handle the connections and cursors. My data are usually stored as Pandas DataFrames and/or GeoPandas's equivalent GeoDataFrames. Difficulties In order to read data from a database table; Using Pandas: I can rely on its .read_sql() methods which takes as a parameter con , as stated in the doc: con :

问题 I keep running into the problem of not being able to connect to the database: django.db.utils.OperationalError: could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket "/opt/bitnami/postgresql/.s.PGSQL.5432/.s.PGSQL.5432"? its my list of databases: List of databases Name | Owner | Encoding | Collate | Ctype | Access privileges ------------+----------+----------+-------------+-------------+-----------------------

来源： https://stackoverflow.com/questions/29965260/psycopg-double-and-single-quotes-insert

来源： https://stackoverflow.com/questions/26875804/psycopg2-writing-json-objects-using-copy-from-how-to-format-the-json-string

来源： https://stackoverflow.com/questions/26875804/psycopg2-writing-json-objects-using-copy-from-how-to-format-the-json-string

来源： https://stackoverflow.com/questions/29621532/how-to-use-insert-in-psycopg2-connection-pooling

来源： https://stackoverflow.com/questions/29621532/how-to-use-insert-in-psycopg2-connection-pooling

来源： https://stackoverflow.com/questions/29621532/how-to-use-insert-in-psycopg2-connection-pooling

来源： https://stackoverflow.com/questions/32107558/how-do-i-convert-numpy-nan-objects-to-sql-nulls