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Jun 16, 2012 · 32. There's the != (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 ...
Mar 21, 2010 · Some of the operators you may know from other languages have a different name in Python. The logical operators && and || are actually called and and or. Likewise the logical negation operator ! is called not. So you could just write: if len(a) % 2 == 0 and len(b) % 2 == 0: or even: if not (len(a) % 2 or len(b) % 2):
The operators <, >, ==, >=, <=, and != compare the values of two objects. is: check for identity - the semantics are that the object (as held in memory) is the object. Again, the documentation says: The operators is and is not test for object identity: x is y is true if and only if x and y are the same object.
It checks whether the right hand side and the left hand side are equal objects (according to their __eq__ or __cmp__ methods.) is is an identity test. It checks whether the right hand side and the left hand side are the very same object. No methodcalls are done, objects can't influence the is operation. You use is (and is not) for singletons ...
The AND is a logical operator. Assume five holds 5 and two holds 2. From Python documentation: The expression x and y first evaluates x; if x is false, its value is returned; otherwise, y is evaluated and the resulting value is returned. Basically, it evaluates the last integer in your case which is true.
Feb 3, 2015 · Python 3.5 introduces the symbol @ for an extra operator. PEP465 introduced this new operator for matrix multiplication, to simplify the notation of many numerical code. The operator will not be implemented for all types, but just for arrays-like-objects.
Dec 27, 2008 · As already answered, yes, there is a ternary operator in Python: <expression 1> if <condition> else <expression 2>. In many cases <expression 1> is also used as Boolean evaluated <condition>. Then you can use short-circuit evaluation. a = 0.
Aug 5, 2010 · 0010. Shortcut: Just to perform an integer division (i.e., discard the remainder, in Python you'd implement it as //) on a number by 2 raised to the number of bits you were shifting. >>> def rshift(no, shift = 1): ... return no // 2**shift. ... # This func will now be equivalent to >> operator.
Apr 30, 2017 · Convert inputs to booleans. Use the bitwise xor operator (^ or operator.xor) For example, bool(a) ^ bool(b) When you convert the inputs to booleans, bitwise xor becomes logical xor. Note that the accepted answer is wrong: != is not the same as xor in Python because of the subtlety of operator chaining.
From the Python 3 docs: The power operator has the same semantics as the built-in pow () function, when called with two arguments: it yields its left argument raised to the power of its right argument. The numeric arguments are first converted to a common type, and the result is of that type. It is equivalent to 2 16 = 65536, or pow(2, 16) Just ...
