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1、在使用pycharm的Structure时可以看到有这些图标
图标上的字母是简写，具体含义如下
在pycharm中是自动补全的变量的类别
p：parameter 参数
m：method 方法
c：class 类
其他的也类似，大同小异
v：variable 变量
f：function 函数
另外，字母左上角有锁的图样子的，表示权限为私有。一般不应改动。
左上角圆圈的含义：
符号左上方的蓝色气泡表示该符号名以两个下划线开始和结束，由解释器和标准库进行特殊处理。
2、函数和方法的区别
与类和实例无绑定关系的function都属于函数（function）；
与类和实例有绑定关系的function都属于方法（method）。
符号含义官方解释
Common
Icon | Description |
|---|---|
Python script | |
Class | |
Method | |
Function | |
Field | |
Variable | |
Property | |
Parameter | |
Element | |
Project structure | |
Directory | |
Package | |
Source root | |
Excluded root | |
Template roots | |
Visibility modifiers | |
private | |
protected | |
public | |
The lock decorator in the upper-left part of a symbol marks a symbol whose name begins with one or more underscores. Such names are considered pseudo-private and are specially treated by an interpreter to restrict their visibility scope. | |
The blue bubble in the upper-left part of a symbol marks a symbol whose name begins and ends with two underscores, and is specially treated by an interpreter and standard library. | |
Bookmarks | |
Anonymous bookmark – a check sign bookmark. Bookmarks are used for quick navigation within a file or across the entire project. | |
Lettered mnemonic bookmark – a letter in the interval from A to Z. | |
Numbered mnemonic bookmark – a number in the interval from 0 to 9. | |
以@property语法创建的方法【自己称之为属性方法】，会显示为紫色圆圈上方+向右的箭头。同时，以@方法名.setter对这个属性方法赋值，显示为紫色圆圈上方+向左的箭头。如下图（来自\Lib\site-packages\plotly\graph_objs_scatter3d.py）：
这里@的用法参见这里
Data Sources
Icon | Description |
|---|---|
Access Method | |
Aggregate | |
Alias Type | |
Argument | |
Body | |
Check | |
Cluster | |
Collation | |
Collection Type | |
Column. For more information about column icon combinations, see Possible icon combinations for columns. | |
Data File | |
Database | |
Read-only status | |
DDL data source | |
Default | |
Exception | |
Extension | |
External Schema | |
Foreign Data Wrapper | |
Foreign Key | |
Foreign Table | |
Index | |
Key | |
Materialized Log | |
Materialized View | |
Object Attribute | |
Object Type | |
Operator | |
Package | |
Projection | |
Read-only data sources | |
Role | |
Routine | |
Rule | |
Scheduled Event | |
Schema | |
Sequence | |
Server | |
Stored procedure or function | |
Synonym | |
Table | |
Table Type | |
Tablespace | |
Trigger | |
User | |
User Mapping | |
Variable | |
View | |
Virtual Table |
官方解释链接
https://www.jetbrains/help/pycharm/symbols.html#file-types
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