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'
+#file1= open(r'c:\User\Cm\Desktop\book.txt','a',encoding='utf-8')
+#file1.write('小强:12本\n')
+#file1.write('李明:15本\n')
+#file1.close()
+new_data=''
+with open(r'c:\User\Cm\Desktop\book.txt','r',encoding='utf-8') as file:
+     for data in file1:
+        if'小强：11本'in data:
+            data=data.replace('小强：10本','小强：11本')
+        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:\User\Cm\Desktop\book.txt','w',encoding='utf-8') as file:
+    file1.write(new_data)
+with open(r'c:\User\Cm\Desktop\book.txt','r',encoding='utf-8') as file:
+    a=file1.read()
+    print(a)
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