save project

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'
-with open(r'C:\Users\EDY\Desktop\a.txt','w',encoding = 'utf-8') as f:
-    f.write('小强：12本\n')
-    f.write('李明：15本\n')
-    f.write('小兰：10本\n')
\ No newline at end of file
+new = ''
+with open(r'C:\Users\EDY\Desktop\a.txt','r',encoding = 'utf-8') as file1:
+    for data in file1:
+        if '小强：10本' in data:
+            print('数据在文件中')
+            data = data.replace('小强：10本','小强：11本')
+        new = new + data
+
+with open(r'C:\Users\EDY\Desktop\a.txt','w',encoding = 'utf-8') as file1:
+    file1.write(new)
\ No newline at end of file