问题描述
我正在尝试在python中运行sql查询。在python 2中，这曾经可以工作，但是现在我在使用python 3，这不再起作用。
I am trying to run a sql query in python. In python 2 this used to work but now that I am using python 3 this no longer is working.
我收到错误 UnicodeDecodeError：'utf- 8'编解码器无法解码位置1的字节0xa0：无效的起始字节
更新，中间添加了3行尝试在此处使用'windows-1252'。相同的错误：
Update, added in the 3 lines in the middle,also tried using 'windows-1252' here. same error:
conn_str = 'DSN=PostgreSQL30'
conn = pyodbc.connect('DSN=STACK_PROD')
###newly added
conn.setdecoding(pyodbc.SQL_CHAR, encoding='utf-8')
conn.setdecoding(pyodbc.SQL_WCHAR, encoding='utf-8')
conn.setencoding(encoding='utf-8')
sql = "select * from stackoverflow where p_date = " + business_date
print("Query: " + sql)
crsr = conn.execute(sql)
回溯：
Traceback (most recent call last):
File "<ipython-input-2-b6db3f5e859e>", line 1, in <module>
runfile('//stack/overflow/create_extract_db_new.py', wdir='//stack/overflow')
File "C:\Users\stack\AppData\Local\Continuum\anaconda3\anaconda3_32bit\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 827, in runfile
execfile(filename, namespace)
File "C:\Users\stack\AppData\Local\Continuum\anaconda3\anaconda3_32bit\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 110, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)
File "//stack/overflow/create_extract_db_new.py", line 37, in <module>
crsr = conn.execute(sql)
也尝试过：
conn.setdecoding(pyodbc.SQL_CHAR, encoding='windows-1252')
conn.setdecoding(pyodbc.SQL_WCHAR, encoding='windows-1252')
conn.setencoding(encoding='windows-1252')
UnicodeDecodeError：'utf-8'编解码器无法解码位置1的字节0xd5
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd5 in position 1: invalid continuation byte
也尝试过：
conn.setdecoding(pyodbc.SQL_CHAR, encoding='utf-8')
conn.setdecoding(pyodbc.SQL_WCHAR, encoding='utf-16')
conn.setencoding(encoding='utf-8')
UnicodeDecodeError：'utf-8'编解码器无法解码位置1的字节0xd5：无效的连续字节
也尝试过：
conn.setdecoding(pyodbc.SQL_CHAR, encoding='utf-8')
conn.setdecoding(pyodbc.SQL_WCHAR, encoding='utf-8')
conn.setencoding(encoding='utf-8')
conn.setdecoding(pyodbc.SQL_WMETADATA, encoding='windows-1252')
UnicodeDecodeError：'utf-8'编解码器无法解码位置1的字节0xd5：无效的连续字节
也尝试过：
conn.setdecoding(pyodbc.SQL_CHAR, encoding='windows-1252')
conn.setdecoding(pyodbc.SQL_WCHAR, encoding='windows-1252')
conn.setencoding(encoding='windows-1252')
conn.setdecoding(pyodbc.SQL_WMETADATA, encoding='windows-1252')
UnicodeDecodeError：'utf-8'编解码器无法解码位置1的字节0xd5连续字节
转储Dsn结果，省略我的用户名，uid，密码和服务器。
Dump Dsn Results, omitting my username, uid, password and server.:
[my_dsn]
Driver=C:\Program Files (x86)\psqlODBC\0903\bin\psqlodbc30a.dll
CommLog=0
Debug=0
Fetch=100
Optimizer=0
Ksqo=1
UniqueIndex=1
UseDeclareFetch=0
UnknownSizes=0
TextAsLongVarchar=1
UnknownsAsLongVarchar=0
BoolsAsChar=1
Parse=0
CancelAsFreeStmt=0
MaxVarcharSize=255
MaxLongVarcharSize=8190
ExtraSysTablePrefixes=dd_;
Description=my_dsn
Database=db_name
Port=9996
ReadOnly=0
ShowOidColumn=0
FakeOidIndex=0
RowVersioning=0
ShowSystemTables=0
Protocol=7.4
ConnSettings=
DisallowPremature=0
UpdatableCursors=1
LFConversion=1
TrueIsMinus1=0
BI=0
AB=0
ByteaAsLongVarBinary=0
UseServerSidePrepare=1
LowerCaseIdentifier=0
GssAuthUseGSS=0
SSLmode=disable
KeepaliveTime=-1
KeepaliveInterval=-1
PreferLibpq=-1
XaOpt=1
错误消息：
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe4 in position 3: unexpected end of data
有人可以帮助我吗？
推荐答案
对我有用的是改为通过odbc将此行用于连接g，然后我进行了编码和解码。
What worked for me was using this line for connectiong via odbc instead, and I took out the encoding and decoding.
con = pyodbc.connect（r'DSN ='+'STACK_PROD'，autocommit = True）
这篇关于PostgreSQL ANSI，Python SQL，utf-8'编解码器无法解码字节0xa0的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！