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'
+file = open(r"C:\Users\MAKCOO-03\Desktop\book.txt",'w',encoding='utf-8')
+file.write('小兰:12本\n')
+file.write('小丽:11本\n')
+file.write('李文:9本\n')
+file.write('张伟:16本\n')
+file.close()
\ No newline at end of file

diy2.py

+file = open(r"C:\Users\MAKCOO-03\Desktop\book.txt",'a',encoding='utf-8')
+file.write('小强:10本\n')
+file.write('李明:15本\n')
+file.close()
\ No newline at end of file

diy3.py

+with open(r"C:\Users\MAKCOO-03\Desktop\book.txt",'r',encoding='utf-8') as file:
+    for data in file:
+        if '小强:10本' in data:
+            print('小强的数据在文件中')
+        if '小兰:12本' in data:
+            print('小兰的数据在文件中')
\ No newline at end of file

diy4.py

+new_data = ''
+with open(r"C:\Users\MAKCOO-03\Desktop\book.txt",'r',encoding='utf-8') as file:
+    for data in file:
+        if '小强:10本' in data:
+            data = data.replace('小强:10本','小强:11本')
+        new_data += data
+
+with open(r"C:\Users\MAKCOO-03\Desktop\book.txt",'w',encoding='utf-8') as file:
+    file.write(new_data)
+
+with open(r"C:\Users\MAKCOO-03\Desktop\book.txt",'r',encoding='utf-8') as file:
+    a = file.read()
+    print(a)
\ No newline at end of file