save project

Untitled-1.py.py

+with open(r"C:\Users\Administrator\Desktop\新建文件夹\你的文件.txt",'a',encoding='utf-8') as pen1:
+    pen1.write('小兰：12本\n')
+    pen1.write('小丽：11本\n')
+    pen1.write('李文：9本\n')
+    pen1.write('张伟：16本\n')
\ No newline at end of file

Untitled-1.py11.py

+with open(r"C:\Users\Administrator\Desktop\新建文件夹\你的文件.txt",'r',encoding='utf-8') as pen1:
+  #  pen1.write('小兰：12本\n')
+   # pen1.write('小丽：11本\n')
+   # pen1.write('李文：9本\n')
+  #  pen1.write('张伟：16本\n')
+    for data in pen1:
+        if'小兰：12本'in data:
+            print('数据在文件中')
\ No newline at end of file

Untitled-1.py23.py

+new_pen1=''
+with open(r"C:\Users\Administrator\Desktop\新建文件夹\你的文件.txt",'r',encoding='utf-8') as pen1:
+  #  pen1.write('小兰：12本\n')
+   # pen1.write('小丽：11本\n')
+   # pen1.write('李文：9本\n')
+  #  pen1.write('张伟：16本\n')
+    for data in pen1:
+        if'小兰：12本'in data:
+            data=data.replace('小兰：12本','小兰：11本')
+        new_pen1+=data
+with open(r"C:\Users\Administrator\Desktop\新建文件夹\你的文件.txt",'w',encoding='utf-8') as pen1:
+    pen1.write(new_pen1)
\ No newline at end of file

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'
+pen1=open(r"C:\Users\Administrator\Desktop\你的文件.txt",'w',encoding='utf-8')
+pen1.write('小兰：12本\n')
+pen1.write('小丽：11本\n')
+pen1.write('李文：9本\n')
+pen1.write('张伟：16本\n')
+pen1.close()
\ No newline at end of file