[Python-ideas] op-assign in function argument

[wxyarv]

has anybody thought the op-assign in function argument is a good idea? now we can use parameter name to specifie argument, like this:
  
 def foo(arg1): pass
  
 # call
 foo(arg1 = "bar")
  
 but, if function has default parameter, it will be inconvenience:
 def foo_with_long_defualts(arg1 = we | are | default | flags | set): pass
  
 # call
 foo_with_long_defaults(arg1 = we | are | default | flags | set | another_flags)
  
 so, why not add op-assign support in named argument?
  
 foo_with_long_defaults(arg1 |= another_flags)
  
  
 are there anybody has the same idea with me?
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