FilesExpand file tree

 main

/

runner.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

42 lines (37 loc) · 1.07 KB

 main

/

runner.py

Copy path

Top

File metadata and controls

• Code
• Blame

42 lines (37 loc) · 1.07 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

import sympy as sp

class PythonExpressionRunner:

"""

模拟 QLExpress 的 Python 表达式解析器

"""

def __init__(self):

"""

初始化表达式运行器

"""

self.context = {}

def add_variable(self, name, value):

"""

将变量添加到上下文

:param name: 变量名

:param value: 变量值

"""

self.context[name] = value

def execute(self, expression):

"""

执行表达式

:param expression: 要执行的表达式字符串

:return: 执行结果或None（执行失败时）

"""

try:

# 将上下文中的变量替换到表达式中

result = eval(expression, {}, self.context)

return result

except Exception as e:

print(f"执行表达式失败: {e}")

return None

def add_function(self, name, function):

"""

添加自定义函数

:param name: 函数名

:param function: 函数对象

"""

self.context[name] = function