Question

我在python和html中有一个输入提交按钮它还没有做任何事情，但是当我添加另一个隐藏的表单值来用来存储变量时，提交按钮就会消失。任何人都可以解释原因吗？

按钮在那里有这段代码 -

#! /usr/bin/python
print 'Content-type: text/html'
print ''

import cgi
import random
form = cgi.FieldStorage()

if "guess" in form:
    guess = form.getvalue("guess")
else:
    guess = ""

if "answer" in form:
    answer = form.getvalue("answer")
else:
    answer = ""
    for i in range(4):
        answer += str(random.randint(0,9))

print answer

print '<h1>Mastermind</h1>'
print '<form>'
print '<input type="text" name="guess" value="' + guess + '">'
print '<input type="hidden" name="answer" value="' + answer + '">'
print '<input type="submit" value="Guess!">'
print '</form>'

但如果我添加另一个值为'numberOfGuesses'

的消息，则会消失

#! /usr/bin/python
print 'Content-type: text/html'
print ''

import cgi
import random
form = cgi.FieldStorage()

if "guess" in form:
    guess = form.getvalue("guess")
else:
    guess = ""

if "answer" in form:
    answer = form.getvalue("answer")
else:
    answer = ""
    for i in range(4):
        answer += str(random.randint(0,9))

print answer

print '<h1>Mastermind</h1>'
print '<form>'
print '<input type="text" name="guess" value="' + guess + '">'
print '<input type="hidden" name="answer" value="' + answer + '">'
print '<input type="hidden" name="numberOfGuesses" value="' + numberOfGuesses + '">'
print '<input type="submit" value="Guess!">'
print '</form>'

Answer 1

并不是说您的按钮正在消失，而是您的程序遇到了异常，因为numberOfGuesses未定义。

要解决此问题，您只需在访问代码之前在代码中的某处定义numberOfGuesses。

numberOfGuesses  = "42"

print '<h1>Mastermind</h1>'
print '<form>'
print '<input type="text" name="guess" value="' + guess + '">'
print '<input type="hidden" name="answer" value="' + answer + '">'
print '<input type="hidden" name="numberOfGuesses" value="' + numberOfGuesses + '">'
print '<input type="submit" value="Guess!">'
print '</form>'

Python + HTML提交按钮随隐藏的表单变量消失

1 个答案: