我在执行Linux Mint的17.2以下project。
我安装了必要的模块并创建了数据库服务器并创建了“dbconstants.py”与数据库信息的附加文件。
username = 'postgres'
password = 'postgres'
dbname = 'mydb'
我想如下部分执行项目：
python -m plagcomps.extrinsic.extrinsic_testing
不过，我收到以下错误
Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 151, in _run_module_as_main
mod_name, loader, code, fname = _get_module_details(mod_name)
File "/usr/lib/python2.7/runpy.py", line 101, in _get_module_details
loader = get_loader(mod_name)
File "/usr/lib/python2.7/pkgutil.py", line 464, in get_loader
return find_loader(fullname)
File "/usr/lib/python2.7/pkgutil.py", line 474, in find_loader
for importer in iter_importers(fullname):
File "/usr/lib/python2.7/pkgutil.py", line 430, in iter_importers
__import__(pkg)
File "plagcomps/__init__.py", line 8, in <module>
import intrinsic
File "plagcomps/intrinsic/__init__.py", line 2, in <module>
from cluster import cluster
File "plagcomps/intrinsic/cluster.py", line 4, in <module>
import classify
File "plagcomps/intrinsic/classify.py", line 173, in <module>
Base.metadata.create_all(engine)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/sql/schema.py", line 3687, in create_all
tables=tables)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1855, in _run_visitor
with self._optional_conn_ctx_manager(connection) as conn:
File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
return self.gen.next()
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1848, in _optional_conn_ctx_manager
with self.contextual_connect() as conn:
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2039, in contextual_connect
self._wrap_pool_connect(self.pool.connect, None),
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2078, in _wrap_pool_connect
e, dialect, self)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1405, in _handle_dbapi_exception_noconnection
exc_info
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/compat.py", line 199, in raise_from_cause
reraise(type(exception), exception, tb=exc_tb)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2074, in _wrap_pool_connect
return fn()
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 376, in connect
return _ConnectionFairy._checkout(self)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 713, in _checkout
fairy = _ConnectionRecord.checkout(pool)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 480, in checkout
rec = pool._do_get()
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 1060, in _do_get
self._dec_overflow()
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 1057, in _do_get
return self._create_connection()
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 323, in _create_connection
return _ConnectionRecord(self)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 449, in __init__
self.connection = self.__connect()
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 607, in __connect
connection = self.__pool._invoke_creator(self)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/strategies.py", line 97, in connect
return dialect.connect(*cargs, **cparams)
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line 385, in connect
return self.dbapi.connect(*cargs, **cparams)
File "/usr/lib/python2.7/dist-packages/psycopg2/__init__.py", line 179, in connect
connection_factory=connection_factory, async=async)
sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) could not translate host name "mydb" to address: Name or service not known
更新：我修改了dbconstants.py如下：
username = 'postgres'
password = 'postgres'
dbname = 'localhost'
然后我收到以下错误：
/usr/lib/pymodules/python2.7/matplotlib/__init__.py:1173: UserWarning: This call to matplotlib.use() has no effect
because the backend has already been chosen;
matplotlib.use() must be called *before* pylab, matplotlib.pyplot,
or matplotlib.backends is imported for the first time.
warnings.warn(_use_error_msg)
Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/home/eadaradhiraj/Downloads/plagcomps/extrinsic/extrinsic_testing.py", line 615, in <module>
save_to_db=False, ignore_high_obfuscation=False, show_false_negpos_info=False, get_best_of=False)
File "/home/eadaradhiraj/Downloads/plagcomps/extrinsic/extrinsic_testing.py", line 553, in test
mid = fingerprintstorage.get_mid(method, n, k, atom_type, hash_size)
File "plagcomps/extrinsic/fingerprintstorage.py", line 313, in get_mid
with _get_connection(autocommit=True) as conn:
File "plagcomps/extrinsic/fingerprintstorage.py", line 92, in _get_connection
conn = psycopg2.connect(user = username, password = password, database = dbname.split("/")[1], host="localhost", port = 5432)
IndexError: list index out of range
只是看了看项目。在你dbconstants.py，设置
dbname='localhost:5432/mydb'
错误：psycopg2.OperationalError：无法解析主机名“localhost”的解决：名称或服务不已知
在我的情况：
我的LAN电缆与系统不正确连接。这就是为什么我收到此错误。因此，这可能是这个问题的方案的一个。
连接LAN电缆后再次运行run命令。它得到解决。