diff --git a/7.5/datas.py b/7.5/datas.py
new file mode 100644
index 0000000000000000000000000000000000000000..fc6fddde8d6ab1b7d43d35cdb956f1ada853b0a0
--- /dev/null
+++ b/7.5/datas.py
@@ -0,0 +1,153 @@
+datas=[
+    #模拟第一类房子
+{
+    "city":"吕梁",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":8000
+},
+{
+    "city":"吕梁",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":7800
+},
+{
+    "city":"吕梁",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":8200
+ },
+    #模拟第二类房子
+    {
+    "city":"吕梁",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":8500
+    },
+    {
+    "city":"吕梁",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":8300
+    },
+    {
+    "city":"吕梁",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":8600
+    },
+    #模拟第三类房子
+    {
+    "city":"吕梁",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":6300
+     },
+    {
+    "city":"吕梁",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":6200
+    },
+    {
+    "city":"吕梁",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":6000
+    },
+#模拟第一类房子
+{
+    "city":"太原",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":12100
+},
+{
+    "city":"太原",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":11800
+},
+{
+    "city":"太原",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":11600
+ },
+    #模拟第二类房子
+    {
+    "city":"太原",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":10900
+    },
+    {
+    "city":"太原",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":10800
+    },
+    {
+    "city":"太原",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":10000
+    },
+    #模拟第三类房子
+    {
+    "city":"太原",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":9000
+     },
+    {
+    "city":"太原",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":8600
+    },
+    {
+    "city":"太原",
+    "area":100,
+    "room":2,
+    "school":1,
+    "style":1,
+    "price":8300
+    },
+    
+    ]
\ No newline at end of file
diff --git a/7.5/predict.py b/7.5/predict.py
new file mode 100644
index 0000000000000000000000000000000000000000..e4f2f3671fd125c95c2991e0d73eb3053976c953
--- /dev/null
+++ b/7.5/predict.py
@@ -0,0 +1,33 @@
+#1.先安装一个科学计算的框架
+import numpy as np
+from datas import datas
+X=[]
+Y=[]
+cityMark={"吕梁":1,"太原":2}
+for item in datas:
+    single=[]
+    #城市
+    single.append(cityMark[item["city"]])
+    #面积
+    single.append(item["area"])
+    #rooms
+    single.append(item["rooms"])
+    #school
+    single.append(item["school"])
+    #style
+    single.append(item["style"])
+    X.append(single)
+    Y.append(item["price"])
+
+X = np.array(X)
+Y = np.array(Y)
+theta = np.linalg.pinv(X.T.dot(X)).dot(X.T).dot(Y)
+print(theta)
+
+# a=np.array([[1,2,3],[1,2,3],[1,2,3]])
+# b=np.array([1,2,3])
+# print(a.dot(b))
+#
+# print(a)
+# print(np.linalg.inv(a))
+