auto save

4.py

+# 修改小强的数据为11本，以及小兰的数据'小兰：12本'修改为14本，最后读取修改后的数据
+new_data=''
+with open(r'C:\Users\qihang\Desktop\test.text','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小aaa：11本'in data:
+            data=data.replace('小aaa：11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\qihang\Desktop\test.text','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+
+with open(r'C:\Users\qihang\Desktop\test.text','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
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