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'
+# file1=open(r'C:\Users\XMBC\Desktop\a.txt','w',encoding='utf-8')
+# file1.write('小兰:12本\n')
+# file1.write('小丽：11本\n')
+# file1.write('李文：9本\n')
+# file1.write('张伟：16本\n')
+# file1.close()
+# with open(r'C:\Users\XMBC\Desktop\a.txt','a',encoding='utf-8') as file1:
+#      file1.write('小强:10本\n') 
+with open('C:\\Users\\XMBC\\Desktop\\a.txt','r',encoding='utf-8') as file1:
+    a=file1.read()   
+    if '小强:10本'in a:
+        print('数据在文件中')    
+    # print(a)
+    a.replace('小强:10本','小强:11本')
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