我可以通过命令行连接到Postgres没问题，但是如果我尝试使用psycopg2模块通过Python连接，我会收到以下错误。有趣的是，我刚刚尝试连接PSeqal.app，它崩溃了同样的错误。
这是我的简单连接脚本，它试图通过Python连接到Postgresql：
def connect(self, params):
""" Connect to the PostgreSQL database server """
conn = None
try:
# connect to the PostgreSQL server
logging.info('Connecting to the PostgreSQL database...')
conn = psycopg2.connect(**params)
# create a cursor
self.cursor = conn.cursor()
except (Exception, psycopg2.DatabaseError) as error:
print(error)
finally:
if conn is not None:
conn.close()
logging.warning('Database connection closed.')
脚本输出：
$ python3 testdb.py
非法指导：4
Apple错误（部分）：
Process: Python [79534]
Path: /usr/local/Cellar/python3/3.6.4_2/Frameworks/Python.framework/Versions/3.6/Resources/Python.app/Contents/MacOS/Python
Identifier: Python
Version: 3.6.4 (3.6.4)
Code Type: X86-64 (Native)
Parent Process: bash [657]
Responsible: Python [79534]
User ID: 501
Date/Time: 2018-03-02 15:30:27.642 +1300
OS Version: Mac OS X 10.13.3 (17D102)
Report Version: 12
Anonymous UUID: xx
Time Awake Since Boot: 21000 seconds
System Integrity Protection: disabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Illegal instruction: 4
Termination Reason: Namespace SIGNAL, Code 0x4
Terminating Process: exc handler [0]
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libpq.5.10.dylib 0x00000001118e8d27 initPQExpBuffer + 32
1 libpq.5.10.dylib 0x00000001118dba93 PQconninfoParse + 43
2 _psycopg.cpython-36m-darwin.so 0x0000000111897cf1 psyco_parse_dsn + 113
3 org.python.python 0x000000010fd4681a _PyCFunction_FastCallDict + 463
4 org.python.python 0x000000010fdaad8e call_function + 489
5 org.python.python 0x000000010fda3c43 _PyEval_EvalFrameDefault + 4811
6 org.python.python 0x000000010fdab4f0 _PyEval_EvalCodeWithName + 1719
7 org.python.python 0x000000010fda293d PyEval_EvalCodeEx + 57
8 org.python.python 0x000000010fd2ec76 function_call + 339
9 org.python.python 0x000000010fd0e9f2 PyObject_Call + 101
10 org.python.python 0x000000010fda3eac _PyEval_EvalFrameDefault + 5428
11 org.python.python 0x000000010fdab4f0 _PyEval_EvalCodeWithName + 1719
12 org.python.python 0x000000010fda293d PyEval_EvalCodeEx + 57
13 org.python.python 0x000000010fd2ec76 function_call + 339
14 org.python.python 0x000000010fd0e9f2 PyObject_Call + 101
15 org.python.python 0x000000010fda3eac _PyEval_EvalFrameDefault + 5428
16 org.python.python 0x000000010fdabe93 _PyFunction_FastCall + 121
17 org.python.python 0x000000010fdaad65 call_function + 448
18 org.python.python 0x000000010fda3c43 _PyEval_EvalFrameDefault + 4811
19 org.python.python 0x000000010fdabe93 _PyFunction_FastCall + 121
20 org.python.python 0x000000010fd0eb71 _PyObject_FastCallDict + 196
21 org.python.python 0x000000010fd0ec94 _PyObject_Call_Prepend + 156
22 org.python.python 0x000000010fd0e9f2 PyObject_Call + 101
23 org.python.python 0x000000010fd598ae slot_tp_init + 57
24 org.python.python 0x000000010fd5683c type_call + 184
25 org.python.python 0x000000010fd0eb3c _PyObject_FastCallDict + 143
26 org.python.python 0x000000010fdaad5e call_function + 441
27 org.python.python 0x000000010fda3c43 _PyEval_EvalFrameDefault + 4811
28 org.python.python 0x000000010fdabe93 _PyFunction_FastCall + 121
29 org.python.python 0x000000010fd0eb71 _PyObject_FastCallDict + 196
30 org.python.python 0x000000010fd0ec94 _PyObject_Call_Prepend + 156
31 org.python.python 0x000000010fd0e9f2 PyObject_Call + 101
32 org.python.python 0x000000010fd598ae slot_tp_init + 57
33 org.python.python 0x000000010fd5683c type_call + 184
34 org.python.python 0x000000010fd0eb3c _PyObject_FastCallDict + 143
35 org.python.python 0x000000010fdaad5e call_function + 441
36 org.python.python 0x000000010fda3c43 _PyEval_EvalFrameDefault + 4811
37 org.python.python 0x000000010fdab4f0 _PyEval_EvalCodeWithName + 1719
38 org.python.python 0x000000010fda28fe PyEval_EvalCode + 42
39 org.python.python 0x000000010fdcb24e run_mod + 54
40 org.python.python 0x000000010fdca26f PyRun_FileExFlags + 160
41 org.python.python 0x000000010fdc994c PyRun_SimpleFileExFlags + 285
42 org.python.python 0x000000010fddd770 Py_Main + 3484
43 org.python.python 0x000000010fd01e1d 0x10fd00000 + 7709
44 libdyld.dylib 0x00007fff6c260115 start + 1
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x00007f86c3db9200 rbx: 0x00007ffedfefe3a0 rcx: 0x0000000000000100 rdx: 0x0000000000010000
rdi: 0x0000000000000b93 rsi: 0x00000000ffff0001 rbp: 0x00007ffedfefe390 rsp: 0x00007ffedfefe380
r8: 0x000000006c3db930 r9: 0x000000000000000f r10: 0x00000000ffff0000 r11: 0x00007f86c3d00000
r12: 0x0000000110665738 r13: 0x0000000111c68510 r14: 0x0000000111cb80b0 r15: 0x00007ffedfefe3a0
rip: 0x00000001118e8d27 rfl: 0x0000000000010206 cr2: 0x00000001118ef90e
Logical CPU: 2
Error Code: 0x00000000
Trap Number: 6
所以我对接下来的尝试感到有点失落？有没有其他人遇到这个？有什么指向哪里看？任何能帮助我完成这项工作的事情都将非常感谢！
答案 0 :(得分：9)
所以看起来像psycopg2库是罪魁祸首，这为我解决了这个问题：
$ pip3卸载psycopg2
...
成功卸载psycopg2-binary-2.7.4
$ pip3安装psycopg2-binary --no-binary：all：
收集psycopg2二进制文件 下载psycopg2-binary-2.7.4.tar.gz（426kB） 100％| --- | 430kB 649kB / s 由于二进制文件被禁用，因此跳过了psycopg2-binary的bdist_wheel。 安装收集的软件包：psycopg2-binary 运行setup.py安装psycopg2-binary ...完成
成功安装psycopg2-binary-2.7.4
$ python3 test.py
连接到PostgreSQL数据库...
一切都好。
数据库连接关闭。
我认为这与我试图在2010年MBP专门构建psycopg2的事实有关，它与硬件有兼容性问题 - 可能是这台机器的2.66 GHz Intel Core i7处理器。
感谢@Laurenz Albe和@joop的快速回复，指示和见解，你帮助我缩小到这个答案，我希望在这份工作期间保持稳定;）干杯！
答案 1 :(得分：1)
根据堆栈跟踪，在这个无害的代码片段中，PostgreSQL客户端发生了这个错误：
WITH cte AS (
SELECT t1.Description AS desc_dest, t2.Description AS desc_src
FROM yourTable t1
INNER JOIN yourTable t2
ON t2.[Group] LIKE t1.[Group] + '[A-Z]%' AND LEN(t1.[Group]) <= 9
)
UPDATE cte
SET desc_dest = desc_src;
非法指令应该意味着执行遇到了不存在的指令代码，这可能是编译器错误，也可能意味着代码是为具有不同指令集的处理器构建的。
问题很可能出现在构建PostgreSQL的过程中。您应该将此投诉提交给构建您正在使用的二进制文件的打包者。