save project

diy.py

+# files=open(r'C:\Users\admin\Desktop\test.txt','w',encoding='utf-8')
+# files.write('小兰:12本\n小丽：12本\n李文：9本\n张伟：16本')
+# files.close()
+# with open(r'C:\Users\admin\Desktop\test.txt','a',encoding='utf-8') as files:
+#     files.write('小强：12本\n李明：15本')
+wenjian=''
+with open(r'C:\Users\admin\Desktop\test.txt','r',encoding='utf-8')as files:
+    for i in files:
+        if '小强:12本' in i:
+            i=i.replace('小强:12本','小强:11本')
+            # wenjian=wenjian+a
+        if '小兰:12本' in i:
+            i=i.replace('小兰:12本','小兰:14本')
+        wenjian=wenjian+i
+with open(r'C:\Users\admin\Desktop\test.txt','w',encoding='utf-8')as files:
+    files.write(wenjian)
+
+        
+            
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