auto save

a.py

+with open(r"C:\Users\Administrator\Desktop\abc.txt",'r',encoding='utf-8')as file1:
+    newstr=''
+    for data in file1:
+        if 'cc:5' in data:
+            data=data.replace('5','66')
+        newstr+=data
+with open(r"C:\Users\Administrator\Desktop\abc.txt",'w',encoding='utf-8')as file1:
+    file1.write(newstr)
+with open(r'C:\Users\Administrator\Desktop\abc.txt','r',encoding='utf-8')as file2:
+    a=file2.read()
+    print(a)
\ No newline at end of file

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\Administrator\Desktop\abc.txt",'a',encoding='utf-8')
+file1.write('cc：12本\n')
+file1.write('ll：11本\n')
+
+file1.close()
\ No newline at end of file

ttt.py

+with open (r"C:\Users\Administrator\Desktop\abc.txt",'r',encoding='utf-8')as file1:
+   
+    #print(a)
+    for data in file1:
+        if 'www:56ben' in data:
+            print("zai")
+       
\ No newline at end of file