CentOS 7中sqlite3找不到怎么办

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Centos7下的nltk启动问题

CentOS 7， Python 3.6，ipython 6.0.0

问题描述

ipython

启动ipython命令

import nltk

爆出以下的错误信息：

In [1]: import nltk---------------------------------------------------------------------------ModuleNotFoundError      Traceback (most recent call last) in ()----> 1 import nltk/opt/python36env/lib/python3.6/site-packages/nltk/__init__.py in () 135 from nltk.translate import * 136 from nltk.sem import *--> 137 from nltk.stem import * 138  139 # Packages which can be lazily imported/opt/python36env/lib/python3.6/site-packages/nltk/stem/__init__.py in ()  27 from nltk.stem.isri import ISRIStemmer  28 from nltk.stem.porter import PorterStemmer---> 29 from nltk.stem.snowball import SnowballStemmer  30 from nltk.stem.wordnet import WordNetLemmatizer  31 from nltk.stem.rslp import RSLPStemmer/opt/python36env/lib/python3.6/site-packages/nltk/stem/snowball.py in ()  24   25 from nltk import compat---> 26 from nltk.corpus import stopwords  27 from nltk.stem import porter  28 from nltk.stem.util import suffix_replace/opt/python36env/lib/python3.6/site-packages/nltk/corpus/__init__.py in ()  64 from nltk.tokenize import RegexpTokenizer  65 from nltk.corpus.util import LazyCorpusLoader---> 66 from nltk.corpus.reader import *  67   68 abc = LazyCorpusLoader(/opt/python36env/lib/python3.6/site-packages/nltk/corpus/reader/__init__.py in () 103 from nltk.corpus.reader.categorized_sents import * 104 from nltk.corpus.reader.comparative_sents import *--> 105 from nltk.corpus.reader.panlex_lite import * 106  107 # Make sure that nltk.corpus.reader.bracket_parse gives the module, not/opt/python36env/lib/python3.6/site-packages/nltk/corpus/reader/panlex_lite.py in ()  13   14 import os---> 15 import sqlite3  16   17 from nltk.corpus.reader.api import CorpusReader/usr/local/lib/python3.6/sqlite3/__init__.py in ()  21 # 3. This notice may not be removed or altered from any source distribution.  22 ---> 23 from sqlite3.dbapi2 import */usr/local/lib/python3.6/sqlite3/dbapi2.py in ()  25 import collections.abc  26 ---> 27 from _sqlite3 import *  28   29 paramstyle = "qmark"ModuleNotFoundError: No module named '_sqlite3'

从错误信息来分析，可以发现，就是sqlite3找不到而已。

问题分析与解决

那就尝试看看sqlite3是否已经安装：

yum search sqlite3

yum search sqlite3Loaded plugins: fastestmirrorLoading mirror speeds from cached hostfile=============================================================================== N/S matched: sqlite3 ================================================================================libsqlite3x.x86_64 : A C++ Wrapper for the SQLite3 embeddable SQL database enginelibsqlite3x-devel.x86_64 : Development files for libsqlite3xpreludedb-sqlite3.x86_64 : Plugin to use prelude with a SQLite3 databaserubygem-sqlite3.x86_64 : Allows Ruby scripts to interface with a SQLite3 databaserubygem-sqlite3-doc.noarch : Documentation for rubygem-sqlite3soci-sqlite3.x86_64 : SQLite3 back-end for socisoci-sqlite3-devel.x86_64 : SQLite3 back-end for sociuwsgi-plugin-sqlite3.x86_64 : uWSGI - SQLite3 plugindspam-sqlite3.x86_64 : SQLite v3.x storage driver for libdspamgolang-googlecode-sqlite-devel.i686 : Trivial sqlite3 binding for Gogolang-googlecode-sqlite-devel.x86_64 : Trivial sqlite3 binding for Golibsq3.x86_64 : A C++ Wrapper for the SQLite3 embeddable SQL database enginelibsq3-devel.x86_64 : Development files for libsqlite3xopendbx-sqlite.x86_64 : SQLite 3 backend - provides sqlite3 support in opendbxpython-sqlite3dbm.noarch : SQLite-backed dictionary conforming to the dbm interfacesqlite-devel.i686 : Development tools for the sqlite3 embeddable SQL database enginesqlite-devel.x86_64 : Development tools for the sqlite3 embeddable SQL database enginesqlite-tcl.x86_64 : Tcl module for the sqlite3 embeddable SQL database enginesqlite3-dbf.x86_64 : Converter of XBase / FoxPro tables to SQLitezabbix20-proxy-sqlite3.x86_64 : Zabbix proxy compiled to use SQLitezabbix22-dbfiles-sqlite3.noarch : Zabbix database schemas and patcheszabbix22-proxy-sqlite3.x86_64 : Zabbix proxy compiled to use SQLite

找到了sqlite3-devel，那就安装好了

yum install sqlite-devel

yum install sqlite-develLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfileResolving Dependencies--> Running transaction check---> Package sqlite-devel.x86_64 0:3.7.17-8.el7 will be installed--> Finished Dependency ResolutionDependencies Resolved===================================================================================================================================================================================== Package          Arch          Version          Repository        Size=====================================================================================================================================================================================Installing: sqlite-devel         x86_64         3.7.17-8.el7         base         104 kTransaction Summary=====================================================================================================================================================================================Install 1 PackageTotal download size: 104 kInstalled size: 366 kIs this ok [y/d/N]: yDownloading packages:sqlite-devel-3.7.17-8.el7.x86_64.rpm                               | 104 kB 00:00:00  Running transaction checkRunning transaction testTransaction test succeededRunning transaction Installing : sqlite-devel-3.7.17-8.el7.x86_64                                 1/1  Verifying : sqlite-devel-3.7.17-8.el7.x86_64                                 1/1 Installed: sqlite-devel.x86_64 0:3.7.17-8.el7                                     Complete!

问题没有解决

重新启动ipython

import nltk

但是问题依然存在，哪里出的问题呢？

问题最终解决

虽然安装了sqlite3的数据库，但是对于ipython的环境来说，确实无法找到sqlite3。

于是，我重新编译，并且安装了一下python3。

注意： 这个是在sqlite3安装成功之后，在安装python的运行环境。

于是重新启动ipython，问题消逝，一切正常，本质上就是sqlite3的安装，以及sqlite3与python运行环境之间的匹配的问题。

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