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Rebuild lang:(var<load_mode> refactored to class:enum.Enum<LoadMode>),
_errors:class<LangDictSearchError> no longer inherits from class<enum.Enum>; Fixed lang:(The imported language dictionary files will be created automatically if the file does not exist, and the file lock is enabled. Unable to parse full form expression. When arg<None> is passed in, conversion language setting cannot be set to the universal word in method<default_lang> & method<str> of class<Lang>), _errors:property<word> of class<LangDictSearchError> return itself; Update README.md; New doc,examples
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‎README.md‎

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# OOPMultilang
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A Python package that supports multi-language conversion of the object-oriented paradigm.
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[![PyPI Latest Release](https://img.shields.io/pypi/v/oopmultilang.svg)](https://pypi.org/project/oopmultilang/)
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[![Package Status](https://img.shields.io/pypi/status/oopmultilang.svg)](https://pypi.org/project/oopmultilang/)
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[![License](https://img.shields.io/pypi/l/oopmultilang.svg)](https://github.com/leoweyr/Python-OOPMultilang/blob/main/LICENSE)
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[![Downloads](https://static.pepy.tech/personalized-badge/oopmultilang?period=total&units=international_system&left_color=grey&right_color=green&left_text=pypi%20downloads)](https://pepy.tech/project/oopmultilang)
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A Python package that supports multi-language conversion of the object-oriented paradigm.
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## 💿Obtainment
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The source code is currently hosted on Github at: https://github.com/leoweyr/Python-OOPMultilang
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Binary installers for the latest released version are available at the [Python Package Index (PyPI)](https://pypi.org/project/oopmultilang/).
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```sh
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# PyPI
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pip install oopmultilang
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```
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## 🔗Dependencies
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- [Easierfile - An easier-to-use Python package that object-oriented encapsulates Python traditional built-in file operations](https://github.com/leoweyr/Python-Easierfile)
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## ⚖️License
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[MIT](https://github.com/leoweyr/Python-OOPMultilang/blob/main/LICENSE)
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## 📗Documentation
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The documentation is hosted on Github repository: https://github.com/leoweyr/Python-OOPMultilang/blob/main/doc

‎doc/API reference.md‎

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## LoadMode
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An enumeration representing two loading modes.
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| **Enum** | Description |
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| -------- | ------------------------------------------------------------ |
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| REALTIME | Static data files are read for each conversion. |
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| ONETIME | Static data files are only read once when the object is instantiated for the first time. |
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## Lang
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A working class for language conversion.
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### Constructor
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```python
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Lang(include, load_mode)
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```
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| Parameter | Type | Default | Description |
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| --------- | -------- | ----------------- | ------------------------------------------------------------ |
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| include | tuple | () | A tuple of expressions which are importing language dictionaries.<br>There are two forms of this expression, for example: <br>1. full: `"./en_us.lang as en_us"`<br>2. short: `"./en_us.lang"`<br>Note that when using the short form, the name of the associated language will be the name of the file. |
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| load_mode | LoadMode | LoadMode.REALTIME | The option for loading mode. |
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> The detail of the data format supported by imported language dictionaries is in [doc](https://github.com/leoweyr/Python-OOPMultilang/blob/main/doc/data%20standard.md#supportdataformat).
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### Default setting
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```
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Lang().default_lang(source_lang, target_lang)
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```
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| Parameter | Type | Default | Description |
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| ----------- | ------ | ------- | ----------------------------------------------------------- |
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| source_lang | string | "" | The option for the default source language to convert from. |
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| target_lang | string | "" | The option for the default target language to convert to. |
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> `None` represents it is the universal word, not a specific language.
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### Conversion
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> The description of the universal word and the native word is in [doc](https://github.com/leoweyr/Python-OOPMultilang/blob/main/doc/data%20standard.md).
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#### Lang().str(word, source_lang, target_lang)
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String conversion method.
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| Parameter | Type | Default | Description |
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| ----------- | ------ | ------- | ------------------------------------ |
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| word | string | | A word to be converted. |
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| source_lang | string | "" | The source language to convert from. |
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| target_lang | string | "" | The target language to convert to. |
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> `""` represents it is the default language set in `Lang().default_lang()`.
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#### Lang().universal
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Object-oriented paradigm conversion method, only supports converting a universal word into other native word.
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There are two syntax statements:
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```python
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# Pure object-oriented paradigm suffix.
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Lang().universal.*
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# End of suffix with the target language to convert to.
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Lang().universal.*.target_lang
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# `*` represents a specific universal word.
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```
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> For the difference between two methods in practical application, please see [example](https://github.com/leoweyr/Python-OOPMultilang/tree/main/examples).
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## LangDictSearchError
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An exception class thrown when language conversion error occurs.
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### Attributes
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<table>
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<tr>
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<td><code>LangDictSearchError().type</code></td>
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<td>Return the type of error reason.</br>● LangDictSearchError.UNIVERSAL_WORD_EXIST_ERROR</br>● LangDictSearchError.SOURCE_LANG_DICT_MATCH_ERROR</br>● LangDictSearchError.TARGET_LANG_DICT_MATCH_ERROR</td>
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</tr>
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<tr>
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<td><code>LangDictSearchError().word</code></td>
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<td>Return the word being converted that caused the error to occur.</td>
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</tr>
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<td><code>LangDictSearchError().position</code></td>
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<td>Return the name of language associated with language dictionary which caused the error to occur.</td>
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</tr>
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</table>

‎doc/data standard.md‎

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The data structure of each language dictionary is uniformly composed of pairs, each consisting of a universal word and its corresponding native word.
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<table>
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<tr>
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<th>Universal word</th>
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<td>Similar to the object-oriented usage, generally expressed in English.</td>
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</tr>
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<tr>
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<th>Native word</th>
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<td>Native word of the language associated with the lang dict.</td>
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</tr>
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</table>
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## Conversion search principle
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```mermaid
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graph TB
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NO1["Input native word: search for the universal word in source language dictionary"] --> NO2["Intermediate universal word: search for the native word in target language dictionary"] --> NO3["Output native word"]
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```
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> [class:Exception\<LangDictSearchError>](https://github.com/leoweyr/Python-OOPMultilang/blob/main/doc/API%20reference.md#LangDictSearchError) will be thrown when the search process goes error.
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## Support data format
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The following are the supported file types for storing language dictionary data:
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| File type | State |
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| --------- | ----- |
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| lang | done |
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| json | to do |
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| ... | ... |
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### .lang
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Commonly found in language pack files of Microsoft software.
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The characteristic of this file type is that each line is an independent key-value pair-like, as the key and value are connected by an equal sign, and `#` is the comment symbol.
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For example:
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```lang
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UI.login = user login # It is a button, and this is a comment.
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UI.register = user register
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```
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‎examples/lang/en_us.lang‎

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UI.login = user login # It is a button, and this is a comment.
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UI.register = user register

‎examples/lang/zh_cn.lang‎

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UI.login = 用户登录 # 它是一个按钮，而这里是注释
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UI.register = 用户注册

‎examples/language_conversion.py‎

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import oopmultilang
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"""
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Define a class<Lang> instance object dedicated to ui function description in the global.
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In the argument passed in param<include>:
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1. ``"./lang/en_us.lang as en_us"``: Expression using the full-form kind.
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2. ``"./lang/zh_cn.lang"``: Expression using the short-form kind. The file name "zh_cn" will be used as the name of the
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language associated with this language dictionary.
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"""
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ui_alt_lang = oopmultilang.Lang(
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include=(
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"./lang/en_us.lang as en_us",
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"./lang/zh_cn.lang"
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),
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load_mode=oopmultilang.LoadMode.REALTIME
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)
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def main():
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"""
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Use the object-oriented paradigm conversion method to obtain the "en_us" native word whose universal word is
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"UI.login".
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"""
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ui_login_alt_english = ui_alt_lang.universal.UI.login.en_us # user login
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"""
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First set the default target language to "en_us", then use the string conversion method to obtain the "en_us" native
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word whose universal word is "UI.login".
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"""
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ui_alt_lang.default_lang(target_lang="en_us")
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ui_login_alt_english = ui_alt_lang.universal.UI.login # user login
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"""
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Use the string conversion method to obtain the "zh_cn" native word whose "en_us" native word is "user login".
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"""
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ui_login_alt_chinese = ui_alt_lang.str("user login", "en_us", "zh_cn") # 用户登录
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"""
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First set the default source language to "en_us", and the default target language to "the universal word".
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And then use the string conversion method obtain the universal word whose "en_us" native word is "user login".
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Finally, use the built-in eval function to execute the statement using the object-oriented paradigm conversion
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method to obtain the "zh_cn" native word whose universal word is "UI.login".
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"""
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ui_alt_lang.default_lang(source_lang="en_us", target_lang=None)
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ui_login_alt_chinese = eval("lang_obj.universal.{}.zh_cn".format(ui_alt_lang.str("user login"))) # UI.login -> 用户登录
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"""
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Try to use the string conversion method to obtain the "en_us" native word whose universal word is non-existent
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"UI.title", catch the exception and print out the word being converted that caused the error to occur.
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"""
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try:
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ui_title_alt_english = ui_alt_lang.str("UI.title", None, "en_us")
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except oopmultilang.LangDictSearchError as error:
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if error.type == oopmultilang.LangDictSearchError.UNIVERSAL_WORD_EXIST_ERROR:
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print(f"{error.word} is not a universal word.")
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"""
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Try to use the string conversion method to obtain the "en_us" native word whose "zh_cn" native word is non-existent
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"界面标题", catch the exception and print out message that the word does not exist in the corresponding language
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dictionary.
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"""
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try:
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ui_title_alt_english = ui_alt_lang.str("界面标题", "zh_cn", "en_us")
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except oopmultilang.LangDictSearchError as error:
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print(f"{error.word} is not in {error.position} dictionary.")
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if __name__ == "__main__":
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main()

‎oopmultilang/__init__.py‎

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from .lang import (
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LoadMode,
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Lang,
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load_mode,
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LangDictSearchError
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)
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__all__ = ["Lang", "load_mode", "LangDictSearchError"]
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__all__ = ["LoadMode", "Lang", "LangDictSearchError"]

‎oopmultilang/_errors.py‎

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import inspect
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import os
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import sys
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from enum import Enum
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class ExpressionError(Exception):
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return error_message
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class LangDictSearchError(Exception, Enum):
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class LangDictSearchError(Exception):
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# Error type.
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UNIVERSAL_WORD_EXIST_ERROR = 1
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SOURCE_LANG_DICT_MATCH_ERROR = 2
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self.__m_error_position = None
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self.__m_message = ""
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# Different error conditions.
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# Different error situations.
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if self.__m_error_type == LangDictSearchError.UNIVERSAL_WORD_EXIST_ERROR:
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self.__m_message = f"'{self.__m_error_word}' is not the universal word in language dictionaries"
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self.__m_message = f"'{self.__m_error_word}' is not a universal word in language dictionaries"
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elif self.__m_error_type == LangDictSearchError.SOURCE_LANG_DICT_MATCH_ERROR:
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self.__m_error_position = source_lang
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self.__m_message = f"'{self.__m_error_word}' is not the native word in '{self.__m_error_position}' dictionary"
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self.__m_message = f"'{self.__m_error_word}' is not a native word in '{self.__m_error_position}' dictionary"
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elif self.__m_error_type == LangDictSearchError.TARGET_LANG_DICT_MATCH_ERROR:
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self.__m_error_position = target_lang
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self.__m_message = f"'{self.__m_error_word}' can not be converted to the native word in '{self.__m_error_position}' dictionary"
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@property
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def word(self):
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return self.word
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return self.__m_error_word
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@property
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def position(self):

‎oopmultilang/_lang_dict_parser.py‎

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class LangDictParser:
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"""
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Each lang dict data structure is uniformly composed of universal word and native word in pairs.
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The data structure of each language dictionary is uniformly composed of pairs, each consisting of a universal word
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and its corresponding native word.
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- ``universal word``: Similar to the object-oriented usage, generally expressed in English.
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- ``native word``: Native word of the language associated with the lang dict.
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"""
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@classmethod
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def loads(cls, lang_dict):
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pass

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