save project

diy.py

+file1=open(r'C:\Users\CM\Desktop\test.txt','w',encoding='utf-8')
+file1.write('小兰：12本\n')
+file1.write('小丽：11本\n')
+file1.write('张伟：16本\n')
+file1.close()
+file1=open(r'C:\Users\CM\Desktop\test.txt','a',encoding='utf-8')
+file1.write('小强：10本\n')
+file1.write('李明：15本\n')
+file1.close()
+with open(r'C:\Users\CM\Desktop\test.txt','r',encoding='utf-8')
+    for data in file1:
+        if '小强：10本\n'in data:
+            print('小强数据在文件中')
+        if '小兰：12本\n'in data:
+            print('小兰数据在文件中') 
+with open(r'C:\Users\CM\Desktop\test.txt','W',encoding='utf-8')
+     file1.write(new_data)
+with open(r'C:\Users\CM\Desktop\test.txt','W',encoding='utf-8')
+    a=file1.read(new_data)
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