auto save

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('C:\\Users\\Administrator\\Desktop\\文件读写.txt','a',encoding='utf-8')
+# file1.write('小兰：12本\n')
+# file1.write('小丽：11本\n')
+# file1.write('小强：15本\n')
+# file1.close()
+# with open('C:\\Users\\Administrator\\Desktop\\文件读写.txt','a',encoding='utf-8') as file1:
+#     file1.write('小兰：12本\n')
+#     file1.write('小丽：11本\n')
+#     file1.write('小强：15本\n')
+# with open('C:\\Users\\Administrator\\Desktop\\文件读写.txt','r',encoding='utf-8') as file1:
+#     a=file1.read()
+#     print(a)
+with open('C:\\Users\\Administrator\\Desktop\\文件读写.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小强：15本' in data:
+            print('在')
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lzh.py

+# file1= open(r'C:\Users\Administrator\Desktop\liuzihng.txt','w',encoding='utf-8')
+# file1.write('小兰: 12本\n')
+# file1.write('小丽: 11本\n')
+# file1.close()
+
+
+# file1= open(r'C:\Users\Administrator\Desktop\liuzihng.txt','a',encoding='utf-8')
+# file1.write('小强: 10本\n')
+# file1.write('李明: 15本\n')
+# file1.close()
+
+
+# file1= open(r'C:\Users\Administrator\Desktop\liuzihng.txt','r',encoding='utf-8')
+# a=file1.read()
+# print(a)
+# file1.close()
+
+
+# with open(r'C:\Users\Administrator\Desktop\liuzihng.txt','r',encoding='utf-8')as flie1:
+#     for data in flie1:
+#         if '小兰: 12本'in data:
+#             print('小兰数据在文件中')
+#         if '小强: 10本'in data:
+#             print('小强数据在文件中')
+
+new_data=''
+with open(r'C:\Users\Administrator\Desktop\liuzihng.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if'小兰: 12本'in data:
+            data=data.replace('小兰: 12本','小兰: 14本')
+        if'小强: 10本' in data:
+            data=data.replace('小强: 10本','小强: 11本')
+        new_data +=data
+#print(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\liuzihng.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+with open(r'C:\Users\Administrator\Desktop\liuzihng.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
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