Python expression operator "Learn Python must know"

operator	Description	Example
Yield x	Generator function Send protocol
Lambda args:expression	Generating anonymous functions
X if y else Z	Ternary selection Expressions (C-series Some python also have)	>>> True if 1>0 else falsetrue

The following excerpt from the Rookie tutorial: http://www.runoob.com/python/python-operators.html People do is still good, but this does not write Python arithmetic operators

The following assumes that the variable A is 10 and the variable B is 20:

operator	Description	Example
+	Add-Two objects added	A + B output result 30
-	Minus-get negative numbers or one number minus the other	-B Output Result-10
*	Multiply by two number or return a string that is repeated several times	A * b output result 200
/	Except-X divided by Y	B/A Output Results 2
%	Modulo-Returns the remainder of the division	B% A output result 0
**	Power-Returns the Y power of X	A**b is 10 of 20, output 100000000000000000000
//	Divide-Returns the integer part of the quotient	9//2 output result 4, 9.0//2.0 output 4.0

Python comparison operators

The following assumes that the variable A is 10 and the variable B is 20:

operator	Description	Example
==	Equals-compares objects for equality	(A = = B) returns FALSE.
!=	Not equal-compares two objects for unequal	(A! = B) returns TRUE.
<>	Not equal-compares two objects for unequal	(a <> B) returns True. This operator is similar to! =.
>	Greater than-returns whether x is greater than Y	(A > B) returns FALSE.
<	Less-Returns whether x is less than Y. All comparison operators return 1 for true, and return 0 for false. This distinction is equivalent to the special variable true and false. Note that these variable names are capitalized.	(A < B) returns TRUE.
>=	Greater than or equal-returns whether X is greater than or equal to Y.	(a >= B) returns FALSE.
<=	Less than or equal-returns whether X is less than or equal to Y.	(a <= B) returns True.

Python assignment operator

The following assumes that the variable A is 10 and the variable B is 20:

operator	Description	Example
=	Simple assignment operator	c = A + B assigns the result of the operation of A + B to c
+=	Addition assignment operator	c + = A is equivalent to C = C + A
-=	Subtraction assignment operator	C-= A is equivalent to C = c-a
*=	Multiplication assignment operator	C *= A is equivalent to C = c * A
/=	Division assignment operator	C/= A is equivalent to C = c/a
%=	Modulo assignment operator	C%= A is equivalent to C = c% A
**=	Power assignment operator	C **= A is equivalent to C = c * * A
//=	Take the divisible assignment operator	C//= A is equivalent to C = c//A

Python bitwise operators

A bitwise operator computes a number as a binary. The bitwise algorithms in Python are as follows:

The variable a in the following table is 60,b 13.

operator	Description	Example
&	Bitwise AND Operator: Two values that participate in the operation, if two corresponding bits are 1, the result of that bit is 1, otherwise 0	(A & B) Output result 12, binary interpretation: 0000 1100
|	Bitwise OR operator: As long as the corresponding two binary has one for 1 o'clock, the result bit is 1.	(A | b) output result 61, Binary interpretation: 0011 1101
^	Bitwise XOR Operator: When two corresponding binary differences, the result is 1	(a ^ b) output result 49, binary interpretation: 0011 0001
~	Bitwise inverse operator: each bits of the data is reversed, which turns 1 to 0 and 0 to 1	(~a) Output result-61, Binary interpretation: 1100 0011, in the complement form of a signed binary number.
<<	Left move operator: The operands of the operands all shift left several bits, the number of "<<" to the right to specify the number of bits moved, high drop, low 0.	A << 2 output results 240, binary interpretation: 1111 0000
>>	Right move operator: Move all the binary of the left operand of ">>" to the right of several bits, and the number to the right of ">>" to specify the number of bits to move	A >> 2 output results 15, binary interpretation: 0000 1111

Python logical operators

operator	Logical Expressions	Description	Example
and	X and Y	Boolean "and"-if x is False,x and y returns FALSE, otherwise it returns the computed value of Y.	(A and B) returns 20.
Or	X or Y	Boolean "or"-if X is non-0, it returns the value of x, otherwise it returns the computed value of Y.	(A or B) returns 10.
Not	Not X	Boolean "Non"-returns False if X is True. If X is False, it returns TRUE.	Not (A and B) returns False

Python member operators

In addition to some of the above operators, Python also supports member operators, which contain a series of members, including strings, lists, or tuples.

operator	Description	Example
Inch	Returns False if the value found in the specified sequence returns True.	x in the y sequence, if X returns True in the y sequence.
Not in	Returns True if no value is found in the specified sequence, otherwise False.	X is not in the Y sequence if x does not return True in the y sequence.

Python identity operator

The identity operator is used to compare the storage units of two objects

operator	Description	Example
Is	is to determine whether two identifiers are referenced from an object	X is y, if ID (x) equals ID (y), is returns result 1
is not	Is does not determine whether two identifiers are referenced from different objects	X is not y if the ID (x) does not equal the ID (y). is not returning result 1

Python operator Precedence

The following table lists all the operators from highest to lowest priority:

operator	Description
**	Index (highest priority)
~ + -	Bitwise flip, unary Plus and minus (the last two methods are called [email protected] and [email protected])
* / % //	Multiply, divide, modulo, and divide
+ -	Addition subtraction
>> <<	Shift right, left shift operator
&	Bit ' and '
^ |	Bitwise operators
<= < > >=	Comparison operators
<> = = =	equals operator
= %= /= //= -= += *= **=	Assignment operators
Is isn't	Identity operator
In No in	Member operators
Not OR and	logical operators

Python expression operator "Learn Python must know"