简介
Python通过gettext模块支持国际化（i18n），可以实现程序的多语言界面的支持。
详解
Linux下Python的国际化编程
在Linux的操作和C语言的国际化过程是一样的，在需要国际化的字符串前面添加_()即可。
（1）代码：internation.py
# -*- coding: utf-8 -*-
#!/usr/bin/env python
import gettext
locale_path = ‘./locale/‘
#gettext.install(‘internation‘, locale_path) # 这条语句会将_()函数自动放到python的内置命名空间中
zh_trans = gettext.translation(‘internation‘, locale_path, languages=[‘zh_CN‘])
en_trans = gettext.translation(‘internation‘, locale_path, languages=[‘en_US‘])
print "----中文版本----"
zh_trans.install()
print _("Hello world!")
print _("Python is a good Language.")
print "----英文版本----"
en_trans.install()
print _("Hello world!")
print _("Python is a good Language.")
（2）生成po文件
xgettext -k_ -o internation.po_en internation.py
xgettext -k_ -o internation.po_zh internation.py
（3）翻译（charset设定为utf-8）
英文：
1 # SOME DESCRIPTIVE TITLE. 2 # Copyright (C) YEAR THE PACKAGE‘S COPYRIGHT HOLDER 3 # This file is distributed under the same license as the PACKAGE package. 4 # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR. 5 # 6 #, fuzzy 7 msgid "" 8 msgstr "" 9 "Project-Id-Version: PACKAGE VERSION\n" 10 "Report-Msgid-Bugs-To: \n" 11 "POT-Creation-Date: 2015-10-08 22:06+0800\n" 12 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" 13 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n" 14 "Language-Team: LANGUAGE <LL@li.org>\n" 15 "MIME-Version: 1.0\n" 16 "Content-Type: text/plain; charset=UTF-8\n" 17 "Content-Transfer-Encoding: 8bit\n" 18 19 #: internation.py:11 internation.py:16 20 msgid "Hello world!" 21 msgstr "translate:Hello world" 22 23 #: internation.py:12 internation.py:17 24 msgid "Python is a good Language." 25 msgstr "translate:python is a good Language."
中文：
1 # SOME DESCRIPTIVE TITLE. 2 # Copyright (C) YEAR THE PACKAGE‘S COPYRIGHT HOLDER 3 # This file is distributed under the same license as the PACKAGE package. 4 # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR. 5 # 6 #, fuzzy 7 msgid "" 8 msgstr "" 9 "Project-Id-Version: PACKAGE VERSION\n" 10 "Report-Msgid-Bugs-To: \n" 11 "POT-Creation-Date: 2015-10-08 22:06+0800\n" 12 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" 13 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n" 14 "Language-Team: LANGUAGE <LL@li.org>\n" 15 "MIME-Version: 1.0\n" 16 "Content-Type: text/plain; charset=utf-8\n" 17 "Content-Transfer-Encoding: 8bit\n" 18 19 #: internation.py:11 internation.py:16 20 msgid "Hello world!" 21 msgstr "您好！" 22 23 #: internation.py:12 internation.py:17 24 msgid "Python is a good Language." 25 msgstr "Python是一种好语言。"
（4）建立翻译文件路径
在主文件目录下建立英文翻译路径./locale/en_US/LC_MESSAGES/和中文翻译路径./locale/zh_CN/LC_MESSAGES/ (对文件层次比较严格)。
（5）生成mo最终文件
msgfmt -o ./locale/en_US/LC_MESSAGES/internation.mo internation.po_en
msgfmt -o ./locale/zh_CN/LC_MESSAGES/internation.mo internation.po_zh
（6）运行
。。。
