Reserved words in python language

Identifiers in Python are names used to identify variables, functions, classes, modules, and other objects. Identifiers can contain letters, numbers, and underscores (_), but they must start with a non-numeric character. The alphabet consists only of A–Z and a–z in the ISO-Latin character set.

Identifiers are case-sensitive, so FOO and foo are two different objects. Special symbols, such as $, %, @, etc., cannot be used in identifiers. In addition, words such as if, else, for, etc. are reserved words and cannot be used as identifiers. (Recommended learning:Python video tutorial)

The following table lists all reserved characters and their descriptions:

Identifiers that start or end with an underscore usually have special meaning. For example, an identifier starting with an underscore (such as _foo) cannot be imported using the from module import * statement. Identifiers preceded and followed by two underscores, such as __init__, are reserved for special methods. Identifiers preceded by two underscores, such as __bar, are used to implement class private attributes. In general, similar identifiers should be avoided.
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##class is used to define the class continue Continue to execute the next loop def is used to define functions or methods del Delete the value of a variable or sequence elif Conditional statements and if else is used in conjunction with else Conditional statement. Conditional statement is used in conjunction with if and elif. It can also be used for exceptions and loops ##exceptexcept exec for finally from global if import in #is lambda not or pass print raise return try while with yield

Reserved words	Description
and	is used for expression operations, logical AND Operation
as	for type conversion
assert	Assertion, used to determine whether the value of a variable or conditional expression is true
break	Interrupt the execution of the loop statement
Including the operation code after catching the exception, used in combination with try and finally
is used to execute python statements
Loop statement
is used for exception statements. After an exception occurs, the code block contained in finally must always be executed. Used in combination with try and except
is used to import modules, used in combination with import
Define global variables
Conditional statements, else, elif Used in combination with
is used to import modules, used in combination with from
Determine whether the variable exists in the sequence
Determine whether the variable belongs to a certain class Example
Define anonymous function
Used for expression operations, logical NOT operations
Used for expression operations, logical OR operations
Placeholder for empty classes, functions, and methods
Print statement
Exception throwing operation
Used to return calculation results from functions
Contains may appear Exception statements, used in combination with except and finally
Loop statement
Simplified Python statements
Used to return values from functions in sequence

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