save project

diy.py

+# # 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'阿伟：16本'
+# with open(r"C:\Users\Administrator\Desktop\book.txt",'r',encoding='utf-8')as sb:
+#     for data in sb:
+#         if '阿伟：16本' in sb:
+#             print('阿伟数据在文件中')
+#         if '李文：9本' in sb:
+#             print('小兰数据在文件中')
+#    # sb.write('小兰：12本\n')
+#     #sb.write('小丽：11本\n')
+new_sb=''
+with open(r"C:\Users\Administrator\Desktop\book.txt",'r',encoding='utf-8') as sb:
+    for data in sb:
+        if '阿伟：16本' in sb:
+            sb=sb.replace('小兰：-133本','小丽：685809本')
+        if '李文：9本' in sb:
+             sb=sb.replace('李文：4568本','阿伟：155776本')
+        new_sb +=sb
+with open(r"C:\Users\Administrator\Desktop\book.txt",'w',encoding='utf-8')as sb:       
+    sb.write(new_sb)
+with open(r"C:\Users\Administrator\Desktop\book.txt",'r',encoding='utf-8') as sb:
+    a=sb.read()
+    print(a)
+        
+  
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