1010import  sys 
1111from  collections .abc  import  Iterator 
1212from  dataclasses  import  dataclass 
13- from  typing  import  Any , Optional ,  TypedDict ,  Union 
13+ from  typing  import  Any , TypedDict 
1414
1515import  requests 
1616import  yaml 
4242""" 
4343
4444
45- def  htmlElementReplace (lookup : str , presentation : Optional [ str ]  =  None ) ->  str :
45+ def  htmlElementReplace (lookup : str , presentation : str   |   None  =  None ) ->  str :
4646    """ 
4747    Replace text in an HTML reference 
4848    """ 
@@ -54,7 +54,7 @@ def htmlElementReplace(lookup: str, presentation: Optional[str] = None) -> str:
5454    return  f"[{ presentation }  ]({ url }  )" 
5555
5656
57- def  glossaryReplace (lookup : str , presentation : Optional [ str ]  =  None ) ->  str :
57+ def  glossaryReplace (lookup : str , presentation : str   |   None  =  None ) ->  str :
5858    """ 
5959    Replace text in a glossary reference 
6060    """ 
@@ -66,7 +66,7 @@ def glossaryReplace(lookup: str, presentation: Optional[str] = None) -> str:
6666    return  f"[{ presentation }  ]({ url }  )" 
6767
6868
69- def  cssXrefReplace (lookup : str , presentation : Optional [ str ]  =  None ) ->  str :
69+ def  cssXrefReplace (lookup : str , presentation : str   |   None  =  None ) ->  str :
7070    """ 
7171    Replace text for CSS cross reference lookup 
7272    """ 
@@ -78,7 +78,7 @@ def cssXrefReplace(lookup: str, presentation: Optional[str] = None) -> str:
7878    return  f"[{ presentation }  ]({ url }  )" 
7979
8080
81- def  domXrefReplace (lookup : str , presentation : Optional [ str ]  =  None ) ->  str :
81+ def  domXrefReplace (lookup : str , presentation : str   |   None  =  None ) ->  str :
8282    """ 
8383    Replace text for DOM cross reference lookup 
8484    """ 
@@ -137,7 +137,7 @@ class TagsYmlItem(TypedDict):
137137    skip : NotRequired [bool ]
138138    """Whether to skip this tag when generating tags""" 
139139
140-     attributes : NotRequired [dict [str , Union [ str ,  AttrYmlItem ] ]]
140+     attributes : NotRequired [dict [str , str   |   AttrYmlItem ]]
141141    """Mapping of attributes used by the tag (name: description)""" 
142142
143143    base : NotRequired [str ]
@@ -175,7 +175,7 @@ class Attr:
175175    Name of the attribute 
176176    """ 
177177
178-     doc : Optional [ str ] 
178+     doc : str   |   None 
179179    """ 
180180    Documentation of the attribute if applicable 
181181    """ 
@@ -185,7 +185,7 @@ class Attr:
185185    Type to accept for the attribute 
186186    """ 
187187
188-     default : Optional [ Any ] 
188+     default : Any   |   None 
189189    """ 
190190    Default value for the attribute 
191191    """ 
@@ -227,12 +227,12 @@ class TagInfo:
227227    List of attributes and their documentation. 
228228    """ 
229229
230-     pre_content : Optional [ str ] 
230+     pre_content : str   |   None 
231231    """ 
232232    Pre-content for the element (eg `<!DOCTYPE html>`) 
233233    """ 
234234
235-     render_options : Optional [ RenderOptions ] 
235+     render_options : RenderOptions   |   None 
236236    """ 
237237    Render options 
238238    """ 
@@ -419,8 +419,8 @@ def attr_entries_to_object(tags: TagsYaml, tag_name: str) -> list[Attr]:
419419    attrs  =  []
420420    for  name , value  in  tag_data ["attributes" ].items ():
421421        if  isinstance (value , str ):
422-             doc : Optional [ str ]  =  value 
423-             default : Optional [ str ]  =  None 
422+             doc : str   |   None  =  value 
423+             default : str   |   None  =  None 
424424            type  =  "AttributeType" 
425425        else :
426426            doc  =  value .get ("doc" )
@@ -479,7 +479,7 @@ def get_tag_escape_children(tags: TagsYaml, tag_name: str) -> bool:
479479    return  tag .get ("escape_children" , True )
480480
481481
482- def  get_tag_pre_content (tags : TagsYaml , tag_name : str ) ->  Optional [ str ] :
482+ def  get_tag_pre_content (tags : TagsYaml , tag_name : str ) ->  str   |   None :
483483    """ 
484484    Return pre-content for the tag 
485485    """ 
@@ -491,7 +491,7 @@ def get_tag_pre_content(tags: TagsYaml, tag_name: str) -> Optional[str]:
491491
492492def  get_tag_render_options (
493493    tags : TagsYaml , tag_name : str 
494- ) ->  Optional [ RenderOptions ] :
494+ ) ->  RenderOptions   |   None :
495495    """ 
496496    Return pre-content for the tag 
497497    """ 
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