parameter. The validation function should return None when the check passes, otherwise an error message will be returned: # Password input password = input("Input password", type=PASSWORD) # Drop-down required=True) def check_age(p): # return None when the check passes, otherwise return the error message When the user input an illegal value, the input field is displayed as follows: You can use code word!') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message �') put_table([ ['Type', 'Content'], ['html', put_html('X²')], ['text'

parameter. The validation function should return None when the check passes, otherwise an error message will be returned: # Password input password = input("Input password", type=PASSWORD) # Drop-down required=True) def check_age(p): # return None when the check passes, otherwise return the error message When the user input an illegal value, the input field is displayed as follows: You can use code word!') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message �') put_table([ ['Type', 'Content'], ['html', put_html('X²')], ['text'

when the check passes, otherwise an error message will be returned: def check_age(p): # return None when the check passes, otherwise return the error ˓→message if p < 10: return 'Too young!!' if p > word!') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message ') For all output functions provided by PyWebIO, please refer to the pywebio.output module the input value is valid, it returns None. When the input value is invalid, it returns an error message string. For example: def check_age(age): if age>30: return 'Too old' elif age<10: return 'Too

when the check passes, otherwise an error message will be returned: def check_age(p): # return None when the check passes, otherwise return the error ˓→message if p < 10: return 'Too young!!' if p > word!') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message ') For all output functions provided by PyWebIO, please refer to the pywebio.output module the input value is valid, it returns None. When the input value is invalid, it returns an error message string. For example: def check_age(age): if age>30: return 'Too old' elif age<10: return 'Too

parameter. The validation function should return None when the check passes, otherwise an error message will be returned: # Password input password = input("Input password", type=PASSWORD) # Drop-down required=True) def check_age(p): # return None when the check passes, otherwise return the error message When the user input an illegal value, the input field is displayed as follows: You can use code word!') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message �') put_table([ ['Type', 'Content'], ['html', put_html('X²')], ['text'

when the check passes, otherwise an error message will be returned: def check_age(p): # return None when the check passes, otherwise return the error ˓→message if p < 10: return 'Too young!!' if p > word!') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message ') For all output functions provided by PyWebIO, please refer to the pywebio.output module the input value is valid, it returns None. When the input value is invalid, it returns an error message string. For example: def check_age(age): if age>30: return 'Too old' elif age<10: return 'Too

required=True) def check_age(p): # return None when the check passes, otherwise return the error message if p < 10: return 'Too young!!' if p > 60: return 'Too old!!' 当用户输入了不合法的值时，页面上的显示如下: word!') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message �') put_table([ ['Type', 'Content'], ['html', put_html('X²')], ['text' the input value is valid, it returns None. When the input value is invalid, it returns an error message string. For example: name (str) – 输入框的名字。与 input_group 配合使用， 用于在输入组的结果中标识不同输入项。 在单个输入 中，不可以设置该参数！

required=True) def check_age(p): # return None when the check passes, otherwise return the error message if p < 10: return 'Too young!!' if p > 60: return 'Too old!!' 当用户输入了不合法的值时，页面上的显示如下: word!') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message �') put_table([ ['Type', 'Content'], ['html', put_html('X²')], ['text' the input value is valid, it returns None. When the input value is invalid, it returns an error message string. For example: name (str) – 输入框的名字。与 input_group 配合使用， 用于在输入组的结果中标识不同输入项。 在单个输入 中，不可以设置该参数！

None，否则返回错误消息: def check_age(p): # return None when the check passes, otherwise return the error␣ �→message if p < 10: return 'Too young!!' if p > 60: return 'Too old!!' age = input("How old are you?" ') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message �') PyWebIO 提供的全部输出函数见pywebio.output 模块。另外，PyWebIO 还支持一些第三方库来进行数据可视 化，参见第三方库生态 。 注解: the input value is valid, it returns None. When the input value is invalid, it returns an error message string. For example: def check_age(age): if age>30: return 'Too old' elif age<10: return 'Too

None，否则返回错误消息: def check_age(p): # return None when the check passes, otherwise return the error␣ �→message if p < 10: return 'Too young!!' if p > 60: return 'Too old!!' age = input("How old are you?" ') # Show a PopUp popup('popup title', 'popup text content') # Show a notification message toast('New message �') PyWebIO 提供的全部输出函数见pywebio.output 模块。另外，PyWebIO 还支持一些第三方库来进行数据可视 化，参见第三方库生态 。 注解: the input value is valid, it returns None. When the input value is invalid, it returns an error message string. For example: def check_age(age): if age>30: return 'Too old' elif age<10: return 'Too