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What’s up with the comma operator’s precedence in Python?
Operator precedence determines the grouping of terms in an expression and decides how an expression is evaluated. The comma is not an operator in Python; therefore, the precedence concept doesn’t work here.
Before moving further, let us first see the precedence of operators in Python from highest precedence to lowest.
| S.No. | Operator & Desc |
|---|---|
| 1 | ** Exponentiation (raise to the power) |
| 2 | ~ + - Complement, unary plus and minus (method names for the last two are +@ and -@) |
| 3 | * / % // Multiply, divide, modulo and floor division |
| 4 | + - Addition and subtraction |
| 5 | << >> Right and left bitwise shift |
| 6 | & Bitwise 'AND' |
| 7 | ^ | Bitwise exclusive `OR' and regular `OR' |
| 8 | <= < > >= Comparison operators |
| 9 | <> == != Equality operators |
| 10 | = %= /= //= -= += *= **= Assignment operators |
| 11 | is is not Identity operators |
| 12 | in not in Membership operators |
| 13 | not or and Logical operators |
Now, let us discuss about the comma.
Example
Let’s say we have the following expressions and we need to decide how it works and calculates −
print("x" in "y", "x")
Output
False x
Example
We got the above output since the comma is not an operator, but a separator between expressions. The above is evaluated as if you had entered −
("x" in "y"), "x"
The above isn’t evaluated like this −
"x" in ("y", "x")
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