python - how to deal with numerous elements in a condition? -

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I sometimes need to use several elements in one condition, all of these are the same type 

  Args = list (if not in "A"), or in args not in "R" or "c" in args: print ("something is missing")  < / Pre> 
 It becomes complicated when the number of elements for testing grows, I tried to combine them into a list but the end result is ugly:  
  args = For the list () which ["a", For "b", "c"]: If not in Arg: Print ("Something is actually missing") break   
 A python to codify this type of condition The method will be (multiple components, all one, one for )   
 
 
 The typical way to do this is as follows:  
  If not all (R "A", "B", "C"), RG for RG (RG in Arg):   
 Also, consider raising an error instead of printing a message.

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