save project

7.py

+file1=open(r"C:\Users\admin\Desktop\test.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.close()
+
+
+file1=open(r"C:\Users\admin\Desktop\test.txt","w",encoding="utf-8")
+file1.write("小兰:12本")
+file1.close()
+
+
+with open(r"C:\Users\admin\Desktop\test.txt","a",encoding="utf-8") as file1:
+    file1.write("张伟：16本\n")
+
+
+with open(r"C:\Users\admin\Desktop\test.txt","r",encoding="utf-8") as file1:
+    a=file1.read()
+    print(a)
+
+
+with open(r"C:\Users\admin\Desktop\test.txt","r",encoding="utf-8") as file1:
+    for data in file1:
+        if "小兰:12本" in data:
+            print("数据在里面")
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