save project

1.p'y

+with open('c:\\Users\\Administrator\\Desktop\\100.txt',"a",encoding='utf-8') as f:
+    f.write('小强:10本\n')
+    f.write('李明:15本\n')
\ No newline at end of file

2.py

+new_i=''
+with open('c:\\Users\\Administrator\\Desktop\\100.txt',"r",encoding='utf-8') as f:
+    for i in f:
+        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:11本')
+        new_i +=i
+with open('c:\\Users\\Administrator\\Desktop\\100.txt',"w",encoding='utf-8') as f:
+    f.write(new_i)
+with open('c:\\Users\\Administrator\\Desktop\\100.txt',"r",encoding='utf-8') as f:
+    a=f.read()
+    print(a)
\ No newline at end of file

3.py

+with open('c:\\Users\\Administrator\\Desktop\\100.txt',"w",encoding='utf-8') as f:
+    f.write('小强:10本\n')
+    f.write('李明:15本\n')
+    f.write('小兰:12本\n')
\ No newline at end of file