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'
+#file1=open(r'c:\Users\ThinkPad\Desktop\test.txt','w',encoding='utf-8')
+#file1.write('小兰：12本\n小丽：11本\n李文：9本\n张伟：16本')
+
+#file1=open(r'c:\Users\ThinkPad\Desktop\test.txt','a',encoding='utf-8')
+#file1.write('小强：10本\n')
+#file1.write('李明：15本\n')
+#file1=open(r'c:\Users\ThinkPad\Desktop\test.txt','a',encoding='utf-8')
+#file1.write('小兰：12本\n')
+
+# with open(r'c:\Users\ThinkPad\Desktop\test.txt','a',encoding='utf-8') as file1:
+#     file1.write('dhfskksvk\n')
+#     file1.write('dhssj;sjf\n')
+new_data=''
+with open(r'c:\Users\ThinkPad\Desktop\test.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        #print(data)
+        if '小强：10本' in data:
+            data=data.replace('小强：10本','小强：11本')
+            print('数据在文件中')
+        if '小兰：12本' in data:
+            data=data.replace('小兰：12本','小兰：14本')
+            print('数据2在文件中')
+        new_data+=data
+with open(r'c:\Users\ThinkPad\Desktop\test.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+with open(r'c:\Users\ThinkPad\Desktop\test.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
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