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'、'张伟：16本'
+file = open(r"C:\Users\小梦\Desktop\test.txt",'w',encoding='utf-8')
+#写入数据
+file.write('小兰：12本\n')
+file.write('小丽：11本\n')
+file.write('李文：9本\n')
+file.write('张伟：16本\n')
+#关闭文件
+file.close()
+with open(r"C:\Users\小梦\Desktop\test.txt",'a',encoding='utf-8') as file:
+    file.write('小强:10本\n')
+    file.write('小明:15本\n')
+with open(r"C:\Users\小梦\Desktop\test.txt",'r',encoding='utf-8') as file:
+    a = file.read()
+    print(a)
+new_data = " "
+with open(r"C:\Users\小梦\Desktop\test.txt",'r',encoding='utf-8') as file:
+    for data in file:
+        if '小强:10本'in data:
+            data = data.replace('小强:10本','小强:11本')
+        new_data +=data 
+with open(r"C:\Users\小梦\Desktop\test.txt",'w',encoding='utf-8') as file:
+    file.write(new_data)
+with open(r"C:\Users\小梦\Desktop\test.txt",'r',encoding='utf-8') as file:
+    a = file.read()
+    print(a)
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