auto save

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'
+new_data=''
+with file1=open(r'C:\Users\Windows 10\Desktop\111.txt','r',encoding='utf-8')as file1:
+    for data in file1:
+        if '小强:10本' in data:
+            data=data.replace('小强:10本','小强:11本')
+        new_data+=data
+
+with file1=open(r'C:\Users\Windows 10\Desktop\111.txt','w',encoding='utf-8')as file1:
+    file1.write(new_data)
\ No newline at end of file

interesting.py

+# Skip to content
+# Search or jump to…
+# Pull requests
+# Issues
+# Marketplace
+# Explore
+ 
+# @PeterFujiyu 
+# PeterFujiyu
+# /
+# python
+# Public
+# 1
+# 00
+# Code
+# Issues
+# Pull requests
+# Actions
+# Projects
+# Wiki
+# Security
+# Insights
+# Settings
+# python/yunsuan.py /
+# @PeterFujiyu
+# PeterFujiyu 增加次方运算
+# Latest commit 9ee1d77 28 days ago
+#  History
+#  1 contributor
+# 62 lines (48 sloc)  1.91 KB
+  
+import sys
+
+def is_number(s):
+    try:
+        float(s)
+        return True
+    except ValueError:
+        pass
+
+    try:
+        import unicodedata
+        unicodedata.numeric(s)
+        return True
+    except (TypeError, ValueError):
+        pass
+
+    return False
+
+while True:
+
+    op1 = input('请输入第一个运算数（必须是数字）：')
+    if not is_number(op1):
+        print('抱歉，您第一个运算数输入错误')
+        sys.exit(1)
+
+    op = input('请输入运算符（必须是+，-，*，/，^）：')
+    if not ((op == '+') or (op == '-') or (op == '*') or (op == '/') or (op == '^')):
+       print('抱歉，您运算符输入错误')
+       sys.exit(1)
+    op2 = input('请输入第二个运算数（必须是数字）：')
+    if not is_number(op2):
+        print('抱歉，您第二个运算数输入错误')
+        sys.exit(1)
+
+    #op1 = float(op1)
+    #op2 = float(op2)
+
+
+    if (op == '+'):
+        #print(op1 + '+' + op2 + '=' + str(float(op1) + float(op2)))
+        print(op1 + '+' + op2 + '=' + '%.3f' % (float(op1) + float(op2)))
+    elif (op == '-'):
+        #print(op1 + '-' + op2 + '=' + str(float(op1) - float(op2)))
+        print(op1 + '-' + op2 + '=' + '%.3f' % (float(op1) - float(op2)))
+    elif (op == '*'):
+        #print(op1 + '*' + op2 + '=' + str(float(op1) * float(op2)))
+        print(op1 + '*' + op2 + '=' + '%.3f' % (float(op1) * float(op2)))
+    elif (op == '/' ):
+        if (op2 == 0):
+            print('抱歉，您输入错误(除数不能为0)')
+            sys.exit(1)
+        else:
+            #print(op1 + '/' + op2 + '=' + str(float(op1) / float(op2)))
+            print(op1 + '/' + op2 + '=' + '%.3f' % (float(op1) / float(op2)))
+    elif (op == '^'):
+        #print(op1 + '^' + op2 + '=' + str(float(op1) ** float(op2)))
+        print(op1 + '^' + op2 + '=' + '%.3f' % (float(op1) ** float(op2)))
+
+        
+        
+
+# © 2021 GitHub, Inc.
+# Terms
+# Privacy
+# Security
+# Status
+# Docs
+# Contact GitHub
+# Pricing
+# API
+# Training
+# Blog
+# About
+# Loading complete
\ No newline at end of file

wew.py

+fi = open(r"C:\Users\Windows 10\Desktop\新建文本文档.txt",'w',encoding='utf-8')
+#print(fi)
+fi.write('小兰:12本')
+fi.close()
\ No newline at end of file