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'
+#C:\Users\20813\Desktop
+# r'C:\Users\20813\Desktop\hello.txt''w
+with open(r'C:\Users\20813\Desktop\hello.txt','w',encoding='utf-8') as filt1:
+    filt1.write('小兰:12本\n')
+    filt1.write('小丽:11本\n')
+    filt1.write('李文:9本\n')
+    filt1.write('张伟:16本\n')
+with open(r'C:\Users\20813\Desktop\hello.txt','a',encoding='utf-8') as filt1:
+    filt1.write('小强:12本\n')
+    filt1.write('李明:15本\n')
+content=''
+with open(r'C:\Users\20813\Desktop\hello.txt','r',encoding='utf-8') as filt1:
+    for data in filt1:
+        if '小强:12本' in data:
+            data=data.replace('小强:12本','小强:11本')
+        if '小兰:12本' in data:
+            data=data.replace('小兰:12本','小兰:14本')
+        content+=data
+with open(r'C:\Users\20813\Desktop\hello.txt','w',encoding='utf-8') as filt1:
+    filt1.write(content)
+    
+
+