auto save

day1.py

+#filel = open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8')
+#a = filel.read()
+#print(a)
+#filel.close()
+
+
+#with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as filel:
+    #a = filel.read()
+    #print(a)
+
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as filel:
+    
+    for data in filel:
+        if'小强: 10本'in data:
+            data = data.replace('小强: 10本','小强: 11本')
+        new_data+=data
+        if'小兰: 12本'in data:
+            data = data.replace('小兰: 12本','小兰: 15本')
+        new_data+=data
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8') as filel:        
+    filel.write(new_data)
+    
\ No newline at end of file

day2.py

+str = '我有一个苹果'
+print(str.replace('一','三'))
\ 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'
+with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8') as filel:
+    filel.write('小兰: 12本\n')
+    filel.write('小丽: 11本\n')
+    filel.write('李文: 9本\n')
+    filel.write('张伟: 16本\n')
+    filel.write('小强: 10本\n')
+    filel.write('李明: 15本\n')
\ No newline at end of file