save project

diy.py

+file1=open(r'C:\Users\Public\Desktop\bird.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.write('张伟：16本\n')
+file1.close()
+# file1=open(r'C:\Users\Public\Desktop\bird.txt','a',encoding='utf-8')
+# file1.write('李文：9999本\n')
+# file1.write('张伟：1666666666本\n')
+# file1.close()
+# file1=open(r'C:\Users\Public\Desktop\bird.txt','r',encoding='utf-8')
+# a=file1.read()
+# print(a)
+# file1.close()
+new_i=''
+with open(r'C:\Users\Public\Desktop\bird.txt','r',encoding='utf-8') as file1:
+    for i in file1:
+        if '小兰：12本'in i:
+            i=i.replace('小兰：12本','小兰：18本')
+        new_i+=i
+with open(r'C:\Users\Public\Desktop\bird.txt','w',encoding='utf-8') as file1:
+    file1.write(new_i)