save project

diy.py

@@ -4,19 +4,32 @@ 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')
-# with open(r'C:\Users\Admin\Desktop\book.txt','a',encoding='utf-8') as file1:
-#     file1.write('小强：12本\n')
-#     file1.write('李明：15本\n')
+with open(r'C:\Users\Admin\Desktop\book.txt','a',encoding='utf-8') as file1:
+    file1.write('小强：12本\n')
+    file1.write('李明：15本\n')
+# with open(r'C:\Users\Admin\Desktop\book.txt','r',encoding='utf-8') as file1:
+#     # for data in file1:
+#     data=file1.read()
+#     if '小强：10本'in data:
+#         print('找到小强啦！')
+#     else:
+#         print('没找到小强哦')
+#     if '小兰：12本'in data:
+#         print('找到小兰啦！')
+#     else:
+#         print('没找到小兰哦')  
+new_data=''  
 with open(r'C:\Users\Admin\Desktop\book.txt','r',encoding='utf-8') as file1:
-    # for data in file1:
-    data=file1.read()
-    if '小强：10本'in data:
-        print('找到小强啦！')
-    else:
-        print('没找到小强哦')
-    if '小兰：12本'in data:
-        print('找到小兰啦！')
-    else:
-        print('没找到小兰哦')    
-
-    
\ No newline at end of file
+    #new_data=''
+    for data in file1:
+        if '小强：12本'in data:                  
+            data=data.replace(str('小强：12本'),str('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
+        #print(data)
+with open(r'C:\Users\Admin\Desktop\book.txt','w',encoding='utf-8') as file1: 
+    file1.write(new_data) 
+with open(r'C:\Users\Admin\Desktop\book.txt','r',encoding='utf-8') as file1:        
+    c=file1.read()  
+    print(c)
\ No newline at end of file