Python 国际化

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

方法1：
xgettext -k_ -o internation.po_en internation.py
xgettext -k_ -o internation.po_zh internation.py


方法2：
find . -type f ( -name '*.py' ) -print > list
xgettext --files-from=list -d internation -o internation.po --from-code=UTF-8

（3）翻译（charset设定为utf-8）

　英文：

# SOME DESCRIPTIVE TITLE.  
# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER  
# This file is distributed under the same license as the PACKAGE package.  
# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.  
#  
#, fuzzy  
msgid ""  
msgstr ""  
"Project-Id-Version: PACKAGE VERSION
"  
"Report-Msgid-Bugs-To: 
"  
"POT-Creation-Date: 2015-10-08 22:06+0800
"  
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE
"  
"Last-Translator: FULL NAME <EMAIL@ADDRESS>
"  
"Language-Team: LANGUAGE <LL@li.org>
"  
"MIME-Version: 1.0
"  
"Content-Type: text/plain; charset=UTF-8
"  
"Content-Transfer-Encoding: 8bit
"  
  
#: internation.py:11 internation.py:16  
msgid "Hello world!"  
msgstr "translate:Hello world"  
  
#: internation.py:12 internation.py:17  
msgid "Python is a good Language."  
msgstr "translate:python is a good Language."

中文：

# SOME DESCRIPTIVE TITLE.  
# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER  
# This file is distributed under the same license as the PACKAGE package.  
# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.  
#  
#, fuzzy  
msgid ""  
msgstr ""  
"Project-Id-Version: PACKAGE VERSION
"  
"Report-Msgid-Bugs-To: 
"  
"POT-Creation-Date: 2015-10-08 22:06+0800
"  
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE
"  
"Last-Translator: FULL NAME <EMAIL@ADDRESS>
"  
"Language-Team: LANGUAGE <LL@li.org>
"  
"MIME-Version: 1.0
"  
"Content-Type: text/plain; charset=utf-8
"  
"Content-Transfer-Encoding: 8bit
"  
  
#: internation.py:11 internation.py:16  
msgid "Hello world!"  
msgstr "您好！"  
  
#: internation.py:12 internation.py:17  
msgid "Python is a good Language."  
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

。。。

Locale directory 参考：

        https://docs.openstack.org/oslo.i18n/latest/user/usage.html