Python: defining my own operators?

by

While technically you cannot define new operators in Python, this clever hack works around this limitation. It allows you to define infix operators like this:

# simple multiplication
x=Infix(lambda x,y: x*y)
print 2 |x| 4
# => 8

# class checking
isa=Infix(lambda x,y: x.__class__==y.__class__)
print [1,2,3] |isa| []
print [1,2,3] <<isa>> []
# => True

More Related Contents:

  1. Does Python have a ternary conditional operator?
  2. “is” operator behaves unexpectedly with integers
  3. What is the difference between ‘/’ and ‘//’ when used for division?
  4. How do “and” and “or” act with non-boolean values?
  5. Behaviour of increment and decrement operators in Python
  6. and / or operators return value [duplicate]
  7. What exactly does += do?
  8. What does the caret (^) operator do?
  9. What does the percentage sign mean in Python
  10. What is the ‘@=’ symbol for in Python?
  11. “x not in y” or “not x in y”
  12. Python != operation vs “is not”
  13. How do I do exponentiation in python? [duplicate]
  14. Why is ” > 0 True in Python 2?
  15. assign operator to variable in python?
  16. ‘is’ operator behaves differently when comparing strings with spaces
  17. Is there a “not equal” operator in Python?
  18. Overriding “+=” in Python? (__iadd__() method)
  19. Why is exponentiation applied right to left?
  20. What does “ mean in Python?
  21. Overloading Addition, Subtraction, and Multiplication Operators
  22. “In” operator for numpy arrays?
  23. Is the behaviour of Python’s list += iterable documented anywhere?
  24. Python augmenting multiple variables inline
  25. What do these operators mean (** , ^ , %, //)? [closed]
  26. >> operator in Python
  27. How does Python’s bitwise complement operator (~ tilde) work?
  28. How do I get a decimal value when using the division operator in Python?
  29. Under what circumstances are __rmul__ called?
  30. Why should I use operator.itemgetter(x) instead of [x]?

Leave a Comment