Question

我正在使用python为我的网页编写一个计数器。我的代码如下：

#!/usr/bin/python 
print """#Content-type: text/html\r\n\r\n 
<html>
<center>
<p>The webpage has been accessed for</p>"""
f=open( "number.txt", "r" )
count = f.read()
n = int( count )
f.close()
f=open( "number.txt", "w" )
f.write( str(n+1) ) 
f.close()
print "<p>"+count+"</p>"
print """<p>times</p>
</center>
</html>
"""

当我打开网页时，只能显示一半页面。然后我打开了页面的源代码，只显示了以下代码：

<html>
<center>
<p>The webpage has been accessed for</p>

之后，我尝试了另一个版本：

#!/usr/bin/python 
print """#Content-type: text/html\r\n\r\n 
<html>
<center>
<p>The webpage has been accessed for</p>"""
f=open( "number.txt", "r" )
count = f.read()
n = int( count )
print "<p>"+count+"</p>"
print """<p>times</p>
</center>
</html>
""" 
f.close()
f=open( "number.txt", "w" )
f.write( str(n+1) ) 
f.close()

它效果更好，但不是我的预期：

<html>
<center>
<p>The webpage has been accessed for</p>
<p>40</p>
<p>times</p>
</center>
</html>

代码还可以，但我发现计数器无法更新！我该怎么办呢？

Answer 1

您的编码工作正常。正如其他人在评论中指出的那样，您可能需要检查文件权限。

我稍微重写了一下你的代码，它在Python中通常是better to use the with functionality来处理文件对象。我还使用string formatting使您的打印语句更整洁/更容易阅读：

with open( "count.txt", "r" ) as f:
    count = f.read()

output = """#Content-type: text/html\r\n\r\n 
<html>
<center>
<p>The webpage has been accessed for</p>
<p>{count}</p>
<p>times</p>
</center>
</html>
""".format(count=count)

count = int(count)
with open( "count.txt", "w" ) as f:
    f.write( str(count+1) )

print(output)

用python写计数器

1 个答案: