save project

diy.py

@@ -8,7 +8,40 @@ filel.close()
 with open(r'C:\Users\EDZ\Desktop\test.txt','a',encoding='utf-8')as filel:
     filel.write('小强:10本\n')
     filel.write('李明:15本\n')
+new_data=''
 with open(r'C:\Users\EDZ\Desktop\test.txt','r',encoding='utf-8')as filel:
     for data in filel:
         if'小强:10本' in data:
-            print('数据在文件中')
+            data=data.replace('小强:10本','小强:11本')
+        if '小兰:12本'in data:
+            data.replace('小兰12本','小兰：14本')
+        new_data +=data 
+with open(r'C:\Users\EDZ\Desktop\test.txt','w',encoding='utf-8')as filel:
+    filel.write(new_data)
+with open(r'C:\Users\EDZ\Desktop\test.txt','r',encoding='utf-8')as filel:
+    a=filel.read()
+    print(a)
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