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Chaining comparison operators in Python
Sometimes we need to use more than one condition checking in a single statement. There are some basic syntax for these kind of checking is x < y < z, or if x < y and x < z etc.
Like other languages, there are some basic comparison operators in Python. These comparison operators are <, <=, >, >=, ==, !=, is, is not, in, not in.
The precedence of these operators are same, and the precedence is lesser than arithmetic, bitwise and shifting operators.
These operators can be arranged arbitrarily. They will be used as a chain. So for an example, if the expression is x < y < z, then it is similar to the x < y and y < z. So from this example, we can see if the operands are p1, p2,..., pn, and the operators are OP1, OP2,..., OPn-1, then it will be same as p1 OP1 p2 and p2 OP2 p3, , pn-1 OPn-1pn
So there are some examples on the chaining features of comparison operators.
Example Code
a = 10 b = 20 c = 5 # c < a < b is same as c <a and a < b print(c < a) print(a < b) print(c < a < b) # b is not in between 40 and 60 print(40 <= b <= 60) # a is 10, which is greater than c print(a == 10 > c)
Output
True True True False True
Example Code
u = 5 v = 10 w = 15 x = 0 y = 7 z = 15 # The w is same as z but not same as v, v is greater than x, which is less than y print(z is w is not v > x < y) # Check whether w and z are same and x < z > y or not print(x < w == z > y)
Output
True True
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