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'
+
+filel=open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8')
+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.close()
+
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8')as filel:
+    filel.write('小强:12本\n')
+    filel.write('李明:15本')
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8')as filel:
+    for i in filel:
+        if'小强:12本'in i:
+            print('找到了')
+        if'小兰:12本'in i:
+            print('找到了')
+
+
+
+str=''
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8')as filel:
+    for str in filel:
+        if '小强:12本'in i:
+            i.replace('小强:12本','小强:14本')
+        str=str+i
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8')as filel:
+    filel.write('str')
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8')as filel:
+    a=filel.read()
+print(a)