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\Thinkpad\Desktop\text.txt','w',encoding='utf-8')
+# with open(r'C:\Users\Thinkpad\Desktop\text.txt','w',encoding='utf-8')as
+# f:
+#     f.write('小强：10本\n')
+#     f.write('李明：15本\n')
+#     f=open(r'C:\Users\Thinkpad\Desktop\text.txt','a',encoding='utf-8')
+#     f.write('小兰：15本\n')
+# with open(r'C:\Users\Thinkpad\Desktop\text.txt','r',encoding='utf-8')as f:
+#     a=f.read()
+#     print(a)
+#     f.close()
+new_data=''
+with open(r'C:\Users\Thinkpad\Desktop\text.txt','r',encoding='utf-8')as f:
+    for data in f:
+        if "小强：10本" in data:
+    #         print('数据在文本中')
+            data=data.replace('小强：10','小强：11')
+        new_data+=data
+print(new_data)
+with open(r'C:\Users\Thinkpad\Desktop\text.txt','w',encoding='utf-8')as f:
+    f.write(new_data)
+f.close()
+
+
+