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:\xiaoyuqi\test.txt','w',encoding='utf-8')
+# file1.write('小兰：12本')
+# file1.write('小丽：11本')
+# file1.write('李文：9本')
+# file1.write('张伟：16本')
+# file1.close()
+
+# with open(r'C:\xiaoyuqi\test.txt','a',encoding='utf-8') as file1:
+#     file1.write('小强：10本\n')
+#     file1.write('李明：15本\n')
+    # for i in file1:
+    #     if '小强：10本' in i:
+    #         print('小强数据在文件中')
+    #     if '李明：15本' in i:
+    #         print('李明数据在文件中')
+
+
+d=''
+with open(r'C:\xiaoyuqi\test.txt','r',encoding='utf-8') as file1:
+    for i in file1:
+        if '小强：10本' in i:
+            i=i.replace('小强：10本','小强：11本')
+        if '小兰：12本' in i:
+            i=i.replace('小兰：12本','小兰：14本')
+        d+=i
+with open(r'C:\xiaoyuqi\test.txt','w',encoding='utf-8') as file1:
+    file1.write(d)
+with open(r'C:\xiaoyuqi\test.txt','r',encoding='utf-8') as file1:
+    e=file1.read()
+    print(e)
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