auto save

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'
+#filel = open
+
+
+#filel.write('小丽：11本\n')
+#filel.write('李文：9本\n')
+#filel.write('张伟：16本\n')
+
+#filel.close()
+
+
+#file.write('小强:10本\n')
+#file.write('李明:15本\n')
+#file.close()
+
+
+#with open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8') as file:
+    #file.write('小明本:15\n')
+new_data=''
+with open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8') as filel:
+    for data in filel:
+        if '小强：10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:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8') as filel:
+    filel.write(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8') as filel:
+    a=filel.read()
+    print(a)
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