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'
+# f=open(r'C:\Users\xmbc\Desktop\1.txt','w',encoding="utf-8")
+# f.write('小兰:12本\n')
+# f.write('小丽:11本\n')
+# f.write('李文:9本\n')
+# f.write('张伟:16本\n')
+# f.close()
+# f=open(r'C:\Users\xmbc\Desktop\1.txt','a',encoding="utf-8")
+# f.write('小强:10本\n')
+# f.write('李明:15本\n')
+# f.close()
+# with open(r'C:\Users\xmbc\Desktop\1.txt','a',encoding="utf-8") as f:
+#     f.write('小强:10本\n')
+#     f.write('李明:15本\n')
+with open(r'C:\Users\xmbc\Desktop\1.txt','r',encoding="utf-8") as f:
+    b=f.read()
+    b=b.replace('小强:10本','小强:11本')
+    b=b.replace('小兰:12本','小兰:14本')
+with open(r'C:\Users\xmbc\Desktop\1.txt','w',encoding="utf-8") as f:
+    f.write(b)   
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