auto save

whd.py

+# 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
+file1=open(r"C:\Users\admin\Desktop\test.txt","w",encoding="utf-8")
+file1.write('小兰：12本\n')
+file1.write('小丽：11本\n')
+file1.write('李文：9本\n')
+file1.close()
+
+
+file1=open(r"C:\Users\admin\Desktop\test.txt","w",encoding="utf-8")
+file1.write("小兰：12本\n")
+file1.close()
+
+with open(r"C:\Users\admin\Desktop\test.txt","a",encoding="utf-8") as file1:
+    file1.write('张伟：16本\n')
+#
+with open(r"C:\Users\admin\Desktop\test.txt","r",encoding="utf-8") as file1:
+    a=file1.read()
+    print(a)
+new_data =""
+with open(r"C:\Users\admin\Desktop\test.txt","r",encoding="utf-8") as file1:
+    for data in file1:
+        if "小兰：12本" in data:
+            data=data.replace("小兰：12本","小兰：14本")  
+        new_data+=data
+with open(r"C:\Users\admin\Desktop\test.txt","w",encoding="utf-8") as file1:
+    file1.write(new_data)

为。py

--- "a/\344\270\272\343\200\202py"