我已经对这个错误进行了大量的谷歌搜索,并将其归结为我正在使用的数据库采用不同的编码这一事实。
我正在使用的 AIX 服务器正在运行
psql 8.2.4
server_encoding | LATIN1 | | Client Connection Defaults / Locale and Formatting | Sets the server (database) character set encoding.
我正在使用的 windows 2008 R2 服务器正在运行
psql (9.3.4)
CREATE DATABASE postgres
WITH OWNER = postgres
ENCODING = 'UTF8'
TABLESPACE = pg_default
LC_COLLATE = 'English_Australia.1252'
LC_CTYPE = 'English_Australia.1252'
CONNECTION LIMIT = -1;
COMMENT ON DATABASE postgres
IS 'default administrative connection database';
现在,当我尝试执行下面的 python 脚本时,出现此错误
Traceback (most recent call last):
File "datamain.py", line 39, in <module>
sys.exit(main())
File "datamain.py", line 33, in main
write_file_to_table("cms_jobdef.txt", "cms_jobdef", con_S104838)
File "datamain.py", line 21, in write_file_to_table
cur.copy_from(f, table, ",")
psycopg2.DataError: invalid byte sequence for encoding "UTF8": 0xa0
CONTEXT: COPY cms_jobdef, line 15209
这是我的脚本
import psycopg2
import StringIO
import sys
import pdb
def connect_db(db, usr, pw, hst, prt):
conn = psycopg2.connect(database=db, user=usr,
password=pw, host=hst, port=prt)
return conn
def write_table_to_file(file, table, connection):
f = open(file, "w")
cur = connection.cursor()
cur.copy_to(f, table, ",")
f.close()
cur.close()
def write_file_to_table(file, table, connection):
f = open(file,"r")
cur = connection.cursor()
cur.copy_from(f, table, ",")
f.close()
cur.close()
def main():
login = open('login.txt','r')
con_tctmsv64 = connect_db("x", "y",
login.readline().strip(),
"d.domain", "c")
con_S104838 = connect_db("x", "y", "z", "a", "b")
try:
write_table_to_file("cms_jobdef.txt", "cms_jobdef", con_tctmsv64)
write_file_to_table("cms_jobdef.txt", "cms_jobdef", con_S104838)
finally:
con_tctmsv64.close()
con_S104838.close()
if __name__ == "__main__":
sys.exit(main())
已删除一些敏感数据。
所以我不确定我该如何继续。据我所知 copy_expert方法可能有助于导出为 UTF8 编码。但是因为我从中提取数据的服务器正在运行 8.2.4 我认为它不支持 COPY编码格式。
我认为我最好的办法是尝试在 Windows 服务器上重新安装编码为 LATIN1 的 postgre 数据库。当我尝试这样做时,出现以下错误。
所以我很困,任何帮助将不胜感激!
更新 我通过将默认本地设置更改为“C”,将 postgre 数据库安装在 Windows 上作为 LATIN1 编码。然而,这给了我以下错误,并且看起来不太可能是成功/正确的方法
我还尝试使用 PSQL COPY 将文件编码为 BINARY功能
def write_table_to_file(file, table, connection):
f = open(file, "w")
cur = connection.cursor()
#cur.copy_to(f, table, ",")
cur.copy_expert("COPY cms_jobdef TO STDOUT WITH BINARY", f)
f.close()
cur.close()
def write_file_to_table(file, table, connection):
f = open(file,"r")
cur = connection.cursor()
#cur.copy_from(f, table)
cur.copy_expert("COPY cms_jobdef FROM STDOUT WITH BINARY", f)
f.close()
cur.close()
仍然没有运气,我得到了同样的错误
DataError: invalid byte sequence for encoding "UTF8": 0xa0
CONTEXT: COPY cms_jobdef, line 15209, column descript
关于菲尔斯的回答,我已经尝试过这种方法,但仍然没有成功。
import psycopg2
import StringIO
import sys
import pdb
import codecs
def connect_db(db, usr, pw, hst, prt):
conn = psycopg2.connect(database=db, user=usr,
password=pw, host=hst, port=prt)
return conn
def write_table_to_file(file, table, connection):
f = open(file, "w")
#fx = codecs.EncodedFile(f,"LATIN1", "UTF8")
cur = connection.cursor()
cur.execute("SHOW client_encoding;")
print cur.fetchone()
cur.copy_to(f, table)
#cur.copy_expert("COPY cms_jobdef TO STDOUT WITH BINARY", f)
f.close()
cur.close()
def write_file_to_table(file, table, connection):
f = open(file,"r")
cur = connection.cursor()
cur.execute("SET CLIENT_ENCODING TO 'LATIN1';")
cur.execute("SHOW client_encoding;")
print cur.fetchone()
cur.copy_from(f, table)
#cur.copy_expert("COPY cms_jobdef FROM STDOUT WITH BINARY", f)
f.close()
cur.close()
def main():
login = open('login.txt','r')
con_tctmsv64 = connect_db("x", "y",
login.readline().strip(),
"ctmtest1.int.corp.sun", "5436")
con_S104838 = connect_db("x", "y", "z", "t", "5432")
try:
write_table_to_file("cms_jobdef.txt", "cms_jobdef", con_tctmsv64)
write_file_to_table("cms_jobdef.txt", "cms_jobdef", con_S104838)
finally:
con_tctmsv64.close()
con_S104838.close()
if __name__ == "__main__":
sys.exit(main())
输出
In [4]: %run datamain.py
('sql_ascii',)
('LATIN1',)
In [5]:
这成功完成了,但是当我运行
select * from cms_jobdef;
新数据库中没有任何内容
我什至尝试过将文件格式从 LATIN1 转换为 UTF8。仍然没有运气
奇怪的是,当我仅使用 postgre COPY 手动执行此过程时它起作用的功能。我不知道为什么。再次感谢您的帮助。
最佳答案
原来有几个选项可以解决这个问题。
Phil 建议的更改客户端编码的选项确实有效。
cur.execute("SET CLIENT_ENCODING TO 'LATIN1';")
另一种选择是动态转换数据。我使用了一个名为 codecs 的 python 模块来执行此操作。
f = open(file, "w")
fx = codecs.EncodedFile(f,"LATIN1", "UTF8")
cur = connection.cursor()
cur.execute("SHOW client_encoding;")
print cur.fetchone()
cur.copy_to(fx, table)
关键是
fx = codecs.EncodedFile(f,"LATIN1", "UTF8")
我的主要问题是我没有将更改提交到数据库!傻我:)
关于python - psycopg2.DataError : invalid byte sequence for encoding "UTF8": 0xa0,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/24176271/