auto save

3.py

+file1= open(r'C:\Users\Administrator\Desktop\114.txt','w',encoding='utf-8')
+# 写入数据
+file1.write('小兰：12本\n')
+file1.write('小丽：11本\n')
+file1.write('李文：9本\n')
+file1.write('张伟：16本\n')
+file1.write('小强：10本\n') 
+file1.write('李明：15本\n')
+# 关闭文件
+file1.close()
+
+with open(r'C:\Users\Administrator\Desktop\114.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小强：10本' in data:
+            print('小强数据在文件中')
+        if '小兰：12本' in data:
+            print('小兰数据在文件中')
+
+# 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\Administrator\Desktop\114.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        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\114.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\114.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)

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'
+new_data=''
+File1=open(r'C:\Users\Administrator\Desktop\114.txt','w',encoding='utf-8')
+File1.write('ln：12本\n')
+File1.write('le：11本\n')
+File1.write('lw：9本\n')
+File1.write('zw：16本\n')
+File1.write(new_data)
+File1.close()
+
+with open(r'C:\Users\Administrator\Desktop\114.txt','a',encoding='utf-8') as File1:
+    File1.write('w：12本\n')
+    File1.write('lm：15本\n')
+
+with open(r'C:\Users\Administrator\Desktop\114.txt','r',encoding='utf-8') as File1:
+    for data in File1:
+        if 'w：12本' in File1:
+            data=data.replace('w：12本','w：114本')
+            # print("OK(o)")
+        # else:
+        #     print("NO(n)")
+        new_data+=data
+
+#with open(r'C:\Users\Administrator\Desktop\114.txt','w',encoding='utf-8') as File1:
+    #File1.write(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\114.txt','r',encoding='utf-8') as File1:
+    a=File1.read()
+    print(a)
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