XPost: alt.folklore.computers, comp.lang.python   
   From: ldo@nz.invalid   
      
   On Sat, 20 Dec 2025 10:12:49 +0000, Richard Kettlewell wrote:   
      
   > Another property suggested in [1] for ‘strong typing’ is that   
   > functions can only be called with with arguments matching a declared   
   > type. In Python, function arguments do not have declared types[2]   
   > and does not even infer them; anything goes. You will only hit an   
   > exception if you try to use the arguments in the wrong way.   
      
   Python calls this “duck typing”. The called code expects the passed   
   objects to have certain members; so long as they have those, they can   
   be of any type. E.g. a function might be written to write to an output   
   file object, but anything passed that has a suitable “.write()” method   
   on it will work.   
      
   In other words, if it looks like a duck and quacks like a duck, then   
   it is acceptable in place of a duck.   
      
   --- SoupGate-Win32 v1.05   
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