save project

diy.py

@@ -4,7 +4,23 @@
 # # file1.write('小强:10本\n')
 # # file1.write('李明:15本\n')
 # file1.close()
-with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8')as file1:
-    file1.write('小丽：11本\n')
-    file1.write('李文：9本\n')
-    file1.write('张伟：16本\n')
\ No newline at end of file
+# with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8') as file1:
+#     file1.write('小丽：11本\n')
+#     file1.write('李文：9本\n')
+#     file1.write('张伟：16本\n')
+# with open(r'C:\Users\Public\Desktop\test.txt','r',encoding='utf-8') as file1:
+#     a=file1.read()
+#     print(a)
+# with open(r'C:\Users\Public\Desktop\test.txt','r',encoding='utf-8') as file1:
+#     for data in file1:
+#         if"小丽:11本"in data:
+#             print("在")
+sb=''
+with open(r'C:\Users\Public\Desktop\test.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if "小丽:11本" in data:
+            data=data.replace("小丽:11本","小丽:12本")
+        sb+=data
+with open(r'C:\Users\Public\Desktop\test.txt','w',encoding='utf-8') as file1:
+    file1.write(sb)
+