variable setting and getting

[wanghaisheng]

I am trying to add i18n feature code like this

app = Flask(__name__)
title_label="😼TikToka™ tiktok/抖音视频"
sub_title_label='批量下载工具'

labels = {"en":  {
      "title_label": "😼TikToka™ tiktok/douyin videos",
      "sub_title_label": 'Batch Download tookit',
      "3rd-title":"douyin/TikTok No Watermark",
      "placeholder": '1.支持作者主页链接批量解析2.支持关键词搜索批量下载 3.支持tag批量下载 4.支持challenge批量下载 5.支持多种格式口令或链接，无需使用符号分开，支持抖音和TikTok链接混合。',
      "kouling":"请输入作者id、昵称或者关键词，标签名称或者将获取的抖音或TikTok的分享口令或网址粘贴于此"
  },
...}

def lang(lang_val):
    # put_text("You click %s button" % lang_val)
    if lang_val=='En':
        title_label=labels[lang_val.lower()]['title_label']

        put_text("You title %s is" % title_label,type(title_label))
        
    elif lang_val=='Zh':
        print('you choose chinese')

    put_row(put_buttons(['En', 'Zh','fr','sp','ru'], onclick=lang)).style('margin-top: 20px')
    print('title_lab=======',title_label)

    put_markdown("""<div align='center' ><font size='14'>%s</font></div>""" % title_label)

it seems after the put_button click,the lang function put text can output a new value
title_label is still the default value not the new one

    print('title_lab=======',title_label)

@wang0618

[wang0618]

You mean the global title_label keep the default value?

[wang0618]

You need add global title_label in your lang() to declare the title_label variable as global

[wanghaisheng]

in default when user access home page, it should display en
when click zh or other lang setting,it should dynamic change title and other label value
actually i dont know whether global variable is the best option.from pywebio there is best practise for i18n
sure I will try this

[wanghaisheng]

change to

def lang(lang_val):
    global title_label

    # put_text("You click %s button" % lang_val)
    if lang_val=='En':

still default value in html

    put_markdown("""<div align='center' ><font size='14'>%s</font></div>""" % title_label)

[wang0618]

If you want to let users select language to implement i18n, you can save the language value in pywebio.session.local.

Doc: https://pywebio.readthedocs.io/en/latest/session.html#pywebio.session.local

[wanghaisheng]

i can move all the lang to main like this

def main():
    cnt = 0

    def add():
        nonlocal cnt
        cnt += 1

    def show():
        put_text(cnt)

    put_buttons(['Add counter', 'Show counter'], [add, show])

but could not figure out ,the following is like 'add' ,when touch lang label ,resetting value of local variable

def lang(lang_val):
    # put_text("You click %s button" % lang_val)
    if lang_val == 'En':
        local.title_label = labels[lang_val.lower()]['title_label']
        put_text("You title %s is" % title_label, type(title_label))

    elif lang_val == 'Zh':
        print('you choose chinese')

this one is like 'show'

    put_row(put_buttons(['En', 'Zh', 'fr', 'sp', 'ru'],
                        onclick=lang)).style('margin-top: 20px')
    put_markdown(
        """<div align='center' ><font size='14'>%s</font></div>""" % local.title_label)

where does the default value go ?

[wang0618]

Could you provide a minimal complete code to reproduce the issue?

[wanghaisheng]

def lang(lang_val):
    # put_text("You click %s button" % lang_val)
    if lang_val == 'En':
        print('you choose english')
        local.title_label = labels[lang_val.lower()]['title_label']

    elif lang_val == 'Zh':
        print('you choose chinese')
        local.title_label = labels[lang_val.lower()]['title_label']

    put_text("You title %s is" % local.title_label, type(local.title_label))

def main():

    local.title_label = "😼TikToka™ tiktok/抖音视频"
    # local.title_label=title_label
    local.sub_title_label = '批量下载工具'
    thirrd_title_label = "douyin/TikTok无水印在线解析"


    print('title_lab default=======', local.title_label)

    put_row(put_buttons(['En', 'Zh', 'fr', 'sp', 'ru'],
                        onclick=lang)).style('margin-top: 20px')
    print('title_lab new=======', local.title_label)

    put_markdown(
        """<div align='center' ><font size='14'>%s</font></div>""" % local.title_label)

chrome_MQArhgwwpg.mp4

[wang0618]

I see, it's the expected behavior 😂.

Because you only output the title (via put_markdown(...)) for once, and you didn't reoutput it after you change the local.title_label

To add i18n feature, a better patton is :

@use_scope('app', clear=True)
def app(lang='en'):
    # implement your app with language <lang>
   ...

def main():
   put_buttons(['En', 'Zh', 'fr', 'sp', 'ru'], onclick=app)
   app()

[wanghaisheng]

app() is this calling method missing para lang ?
def app(lang='en'):

[wang0618]

call app() will use the deafult value of lang

[wanghaisheng]

nope .I just change app to lang, lang() will expose a call value error but never mind session info works

[wang0618]

Also, you can get the language code of users' webbroswer via pywebio.session.info.user_language

Refer to the pywebio.session.info doc for more info, and here is a demo to use pywebio.session.info.user_language to make i18n

[wanghaisheng]

session.info.user_language works like a charm .
all i need is to persistent different language labels json ,

labels = {"en":  {
    "title": "😼TikToka™ tiktok/douyin videos",
    "sub_title_label": 'Batch Download tookit',
    "3rd-title": "douyin/TikTok No Watermark",
    "placeholder": '1.支持作者主页链接批量解析2.支持关键词搜索批量下载 3.支持tag批量下载 4.支持challenge批量下载 5.支持多种格式口令或链接，无需使用符号分开，支持抖音和TikTok链接混合。',
    "kouling": "请输入作者id、昵称或者关键词，标签名称或者将获取的抖音或TikTok的分享口令或网址粘贴于此"
},
    "zh": {
    "title": '😼TikToka™ tiktok/douyin 视频',
    "sub-title": 'Batch Download tookit',
    "3rd-title": "douyin/TikTok无水印在线解析",
    "placeholder": '1.支持作者主页链接批量解析2.支持关键词搜索批量下载 3.支持tag批量下载 4.支持challenge批量下载 5.支持多种格式口令或链接，无需使用符号分开，支持抖音和TikTok链接混合。',
    "kouling": "请输入作者id、昵称或者关键词，标签名称或者将获取的抖音或TikTok的分享口令或网址粘贴于此"
},


}
    

def lang(en,zh,fr,sp,ru):
    # put_text("You click %s button" % lang_val)
    if 'en' in session_info.user_language :
        print('you choose english')
        return en
    elif 'zh' in session_info.user_language :
        print('you choose chinese')
        return zh
    elif 'fr' in session_info.user_language :
        print('you choose french')
        return fr
    elif 'es' in session_info.user_language :
        print('you choose spanish')
        return sp
    else:
        return en    
def main():

    title_label=lang(labels['en']['title'],labels['zh']['title'],labels['fr']['title'],labels['sp']['title'],labels['ru']['title'])

    put_markdown(
        """<div align='center' ><font size='14'>%s</font></div>""" % title_label)

[wanghaisheng]

@wang0618
for config it seems does not work

def main():
    # title_label=lang(en_labels['title'],zh_labels['title'],fr_labels['title'],es_labels['title'],ru_labels['title'])
    display_label =label() # 我在这里根据lang给dict赋值 然后后面引用 这样子我没法把config弄到def上面@config这种形式
    """%s

    %s
    """%(display_label['head_title'],display_label["head_description"])
    config(title=display_label['head_title'], description=display_label["head_description"])

[wang0618]

config() need to be added in global context. that means you can't change it after app server start.

You can use pywebio.session.set_env() to change the page title for single session

[wanghaisheng]

@wang0618

    app.add_url_rule('/<lang>', 'webio_view', webio_view(main(lang)),
                     methods=['GET', 'POST', 'OPTIONS'])

@config(title=title, description=description)
def main(display_label):
    if display_label is None:
        display_label=en_labels

could not find the right way to pass lang to url rule method

[wanghaisheng]

AssertionError: View function mapping is overwriting an existing endpoint function: webio_view

[wang0618]

Ooops

from functools import partial
    app.add_url_rule('/', 'webio_view', webio_view(main),
                     methods=['GET', 'POST', 'OPTIONS'])
    app.add_url_rule('/en', 'webio_view_en', webio_view(partial(main, lang='en')),
                     methods=['GET', 'POST', 'OPTIONS'])
    app.add_url_rule('/zh', 'webio_view_zh', webio_view(partial(main, lang='zh')),
                     methods=['GET', 'POST', 'OPTIONS'])    

[wanghaisheng]

and

def main():
lang = eval_js("new URLSearchParams(window.location.search).get('lang')") or 'en'
put_text(lang)

to

def main(lang):
// lang = eval_js("new URLSearchParams(window.location.search).get('lang')") or 'en'
put_text(lang)

app.add_url_rule('/', 'webio_view', webio_view(partial(main, lang='')),
                 methods=['GET', 'POST', 'OPTIONS'])

bingo
3ks

[wang0618]

def main(lang='en'):
    put_text(lang)

[wanghaisheng]

that s better if i left it blank i need

    if lang=='':