Merge branch 'ps1' into 'main'

changes 新增：流动性比率

See merge request root/IndexCalculation!27

基本信用评级指标/流动性风险/流动性比率.py

@@ -0,0 +1,28 @@
+from fastapi import APIRouter
+from pydantic import BaseModel
+
+INDEX = "流动性比率（%）"
+
+router = APIRouter()
+
+
+class Params(BaseModel):
+    现金: float
+    对央行的债权: float
+    对同业的债权: float
+    交易性金融资产: float
+    相关受限资产: float
+    资产总计: float
+
+
+@router.post("/{}".format(INDEX))
+def func(p: Params):
+    try:
+        m = p.现金 + p.对央行的债权 + p.对同业的债权 + p.交易性金融资产 + p.相关受限资产
+        result = m / p.资产总计 * 100
+        return round(result, 2)
+
+    except ZeroDivisionError:
+        return "算式无意义"
+    except Exception:
+        return "计算错误"