Pyodbc - “未找到数据源名称，并且未指定默认驱动程序”

我很难得到pyodbc工作。我有unixodbc , unixodbc-dev, odbc-postgresql, pyodbc安装在我的 Linux Mint 14 上的软件包。 我对自己找到解决方案失去了希望，感谢任何帮助。详情请参阅下面：

Running:

>>> import pyodbc
>>> conn = pyodbc.connect("DRIVER={PostgreSQL};SERVER=localhost;DATABASE=test;USER=openerp;OPTION=3;")

给我：

>>> pyodbc.Error: ('IM002', '[IM002] [unixODBC][Driver Manager]Data source name not found, and no default driver specified (0) (SQLDriverConnect)')

# odbcinst -j 给出:

unixODBC 2.2.14
DRIVERS............: /etc/odbcinst.ini
SYSTEM DATA SOURCES: /etc/odbc.ini
FILE DATA SOURCES..: /etc/ODBCDataSources
USER DATA SOURCES..: /home/atman/.odbc.ini
SQLULEN Size.......: 4
SQLLEN Size........: 4
SQLSETPOSIROW Size.: 2

这让我觉得有一个unixodbc配置问题。 这是我的unixodbc配置文件内容：

File /etc/odbcinst.ini:

[PostgreSQL ANSI]
Description     = PostgreSQL ODBC driver (ANSI version)
Driver      = psqlodbca.so
Setup       = libodbcpsqlS.so
Debug       = 0
CommLog     = 1
UsageCount      = 2

[PostgreSQL Unicode]
Description     = PostgreSQL ODBC driver (Unicode version)
Driver      = psqlodbcw.so
Setup       = libodbcpsqlS.so
Debug       = 0
CommLog     = 1
UsageCount      = 2

File /etc/odbc.ini :

[PostgreSQL test]
Description         = PostgreSQL 
Driver              = PostgreSQL ANSI
Trace               = No
TraceFile           = /tmp/psqlodbc.log
Database            = template1
Servername          = localhost
UserName            =
Password            =
Port                =
ReadOnly            = Yes
RowVersioning       = No
ShowSystemTables    = No
ShowOidColumn       = No
FakeOidIndex        = No
ConnSettings        =

File ~/.odbc.ini:

[DEFAULT]
Driver = PostgreSQL

[PostgreSQL]
Description         = Test to Postgres
Driver              = PostgreSQL
Trace               = Yes
TraceFile           = sql.log
Database            = nick
Servername          = localhost
UserName            =
Password            =
Port                = 5432
Protocol            = 6.4
ReadOnly            = No
RowVersioning       = No
ShowSystemTables    = No
ShowOidColumn       = No
FakeOidIndex        = No
ConnSettings        =

我相信您问题的答案是在您的 ~/.odbc.ini 文件中您说使用驱动程序PostgreSQL- 但您尚未在 /etc/odbcinst.ini 文件中定义该驱动程序。尝试改变PostgreSQL to PostgreSQL ANSI or PostgreSQL Unicode（两者均在 /etc/odbcinst.ini 中定义）。