Is there a "not equal" operator in Python?
How would you say does not equal?
if hi == hi: print "hi" elif hi (does not equal) bye: print "no hi"
Is there something equivalent to
== that means "not equal"?
!=. See comparison operators. For comparing object identities, you can use the keyword
is and its negation
1 == 1 # -> True 1 != 1 # -> False  is  #-> False (distinct objects) a = b = ; a is b # -> True (same object)
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!= (vs equal
Are you asking about something like this?
answer = 'hi' if answer == 'hi': # equal print "hi" elif answer != 'hi': # not equal print "no hi"
This Python - Basic Operators chart might be helpful.
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!= (not equal) operator that returns
True when two values differ, though be careful with the types because
"1" != 1. This will always return True and
"1" == 1 will always return False, since the types differ. Python is dynamically, but strongly typed, and other statically typed languages would complain about comparing different types.
There's also the
# This will always print either "hi" or "no hi" unless something unforeseen happens. if hi == "hi": # The variable hi is being compared to the string "hi", strings are immutable in Python, so you could use the 'is' operator. print "hi" # If indeed it is the string "hi" then print "hi" else: # hi and "hi" are not the same print "no hi"
is operator is the object identity operator used to check if two objects in fact are the same:
a = [1, 2] b = [1, 2] print a == b # This will print True since they have the same values print a is b # This will print False since they are different objects.
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You can use both
However, note that
!= is preferred where
<> is deprecated.
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Seeing as everyone else has already listed most of the other ways to say not equal I will just add:
if not (1) == (1): # This will eval true then false # (ie: 1 == 1 is true but the opposite(not) is false) print "the world is ending" # This will only run on a if true elif (1+1) != (2): #second if print "the world is ending" # This will only run if the first if is false and the second if is true else: # this will only run if the if both if's are false print "you are good for another day"
in this case it is simple switching the check of positive == (true) to negative and vise versa...
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- Are you asking about
- Attention that <> doesn't work any more in python 3, so use !=
- from python documentation:
Python3 : The operators <, >, ==, >=, <=, and != compare the values of two objects.docs.python.org/3/reference/expressions.html#value-comparisons
- from python documentation:
- How would you compare two binary data?
- Just some info, PEP401 mentioned in the comments was an April Fool joke.
<>is not supported in Python3 now.
- Just for the record: Comparison operators in Python 3.7
- Note that
is notwon't work for string comparison
- this answer is basically a copy of the one @user128364 gave before.
- What value would you assign to the variables
bye? Whatever it would be, the elif clause would never be reached. Lastly, this example does not clearly provide an answer to the question.