Question

从HTML获取值并打印到文件的Test.py代码会收到回溯错误为什么文件描述符的错误正在发生。我是新手。

#!/usr/bin/python
import cgi

def get_data():
    '''
    This function writes the HTML data into the file 

    '''

    print "Content- type : text/html\n"

    form = cgi.FieldStorage()

    f = open("abc.txt","w")

    f.write(form.getvalue('firstname'))
    f.write(form.getvalue('lastname'))
    f.write(form.getvalue('age'))
    f.write(form.getvalue('gender'))
    f.close() 

    #print "Hello ", Fname, Lname, Age, Gender

get_data()

Tracebacjk错误：

Traceback (most recent call last):
 File "test.py", line 33, in <module>
get_data()
File "test.py", line 25, in get_data
f.write(form.getvalue('firstname') + '\n')
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

我的HTML源文件

 <html>
<head>
<title>INFORMATION</title>
</head>
<body>
 <form action = "/cgi-bin/test.py" method = "post">
    FirstName:
    <input type = "text" name = "firstname" /><br>
    LastName:
    <input type = "text" name = "lastname" /><br>
    Age:
    <input type = "text" name = "age" /><br>
    Gender:
    <input type="radio" name="gender" value="male" /> Male
    <input type="radio" name="gender" value="female" /> Female

    <input type = "submit" name = "submit "value = "SUBMIT">
    <input type = "reset" name = "reset" value = "RESET">
    </form>
 </body>

添加了html文件。请检查

Answer 1

代码以写入模式（w）打开文件。

您无法迭代使用写入模式打开的文件。

如果要将传递的POST数据写入文件，只需写入即可。（没有for循环）。如果您希望值以行分隔，请附加换行符（\n）。

f = open("abc.txt","w")
f.write(form.getvalue('firstname', '?') + '\n')
f.write(form.getvalue('lastname', '?') + '\n')
f.write(form.getvalue('age', '?') + '\n')
f.write(form.getvalue('gender', '?') + '\n')
f.close()

更优先使用with：

with open("abc.txt","w") as f:
    f.write(form.getvalue('firstname', '?') + '\n')
    f.write(form.getvalue('lastname', '?') + '\n')
    f.write(form.getvalue('age', '?') + '\n')
    f.write(form.getvalue('gender', '?') + '\n')

您是否使用for执行以下操作？

with open("abc.txt", "w") as f:
    for param in ['firstname', 'lastname', 'age', 'gender']:
        f.write(form.getvalue(param, '?') + '\n')

TypeError：+的不支持的操作数类型：'NoneType'和'str'

1 个答案: