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\栩栩\Desktop\toony.txt','w',encoding = "utf-8")
+# file.write('小兰，12本\n')
+# file.write('小丽，11本\n')
+# file.write('李文，9本\n')
+# with = open(r'C:\Users\栩栩\Desktop\toony.txt','w',encoding = "utf-8") as file:
+#     f.write("小兰：12本\n")
+#  with = open(r'C:\Users\栩栩\Desktop\toony.txt','w',encoding = "utf-8") as file:
+# for i in file(3):
+#     if '小兰：12本'in i:
+#         print("在里面")
+#     else:
+#         print("不在")
+x=''
+with open(r'C:\Users\栩栩\Desktop\toony.txt','r',encoding = "utf-8") as file:
+        for i in file:
+            if '小兰：12本'in i:
+                i.repiace('小兰，12本','小兰，14本')
+                print(i)
+                x=x+i
+with open(r'C:\Users\栩栩\Desktop\toony.txt','w',encoding = "utf-8") as file:
+    file.write(x)