save project

diy.py

+#file1=open(r'C:\\Users\\Administrator\\Desktop\\test.txt','w',encoding='utf-8')
+#file1.write('小兰:12本')
+#file1.write('小丽:13本')
+#file1.write('李文:9本')
+#file1.write('张伟:16本')
+#file1.close()
+# with open(r'C:\\Users\\002\\Desktop\\book.txt','r',encoding='utf-8')as file1:  
+#     for data in file1:
+#         if '小强:12本'in data:
+#             print('数据在文件中')
+new_data=' '
+with open('C:\\Users\\002\\Desktop\\book.txt','r',encoding='utf-8') as fif:
+    for i in fif:
+        if '小兰:12本' in i :
+            i=i.replace('小兰:12本','小兰:14本')
+        print(i)
+        new_data=new_data+i
+with open('C:\\Users\\002\\Desktop\\book.txt','w',encoding='utf-8') as fif11:
+    fif11.write(new_data)