Question

我有这个代码，但它说TypeError没有足够的格式字符串参数，即使我给它一个元组数量正确的元组。有人可以帮我这个吗？我已经查看了堆栈溢出，python文档似乎也没有帮助。

image_urls = {
'horse.jpg': 'a.jpg',
'bison.jpg': 'b.jpg',
'bald_eagle.jpg': 'c.jpg',
'pig_in_mud.jpg': 'd.jpg',
'baby_monkey.jpg': 'e.jpg',
'cute_golden_retriever.jpg': 'f.jpg',
'cute_fluffy_bunny.jpg': 'g.jpg',
'fluffy_kitten.jpg': 'h.jpg',
'default_profile_pic.jpg': 'i.png'
}
mystr = '''<tr><td>Username:</td><td><input type='text' name='username'/></td></tr>
        <tr><td>Profile picture:</td><td>
            <table>
                <tr><td><img src='%s'/></td><img src='%s'/><td></td><td><img src='%s'/></td></tr>
                <tr><td><img src='%s'/></td><img src='%s'/><td></td><td><img src='%s'/></td></tr>
                <tr><td><img src='%s'/></td><img src='%s'/><td></td><td><img src='%s'/></td></tr>
            </table>
        </td></tr>
        <tr><td colspan="2" class="description"><i>Image must be 1MB or less.</i></td></tr>
        <tr><td>Website:</td><td><input type='url' name='website' placeholder='example.com'/><td/></tr>
        <tr><td colspan="2" class="description"><i>Got a home on the web? Put it here.</i></td></tr>
        <tr><td>Bio:</td><td><textarea name='bio' placeholder='I am John Doe, and I enjoy doing this, that and a little more of this. (more content more elaboration)'></textarea></td></tr>
        <tr><td colspan="2" class="description"><i>Tell about yourself here.</i></td></tr>
        <tr><td>Gender:</td><td><input type='radio' name='gender'/> M <input type='radio' name='gender'/> F</td></tr> 
        <tr><td>Age:</td><td><input type='text' name='age'/></td></tr>
        </table>
        <h4>Privacy</h4>
        <table>
        <tr><td>Hide age</td><td><input type="checkbox" name="hide-age"/></td></tr>
        <tr><td>Hide gender</td><td><input type="checkbox" name="hide-gender"/></td></tr>
        <tr><td>Hide email</td><td><input type="checkbox" name="hide-email"/></td></tr>
        </table>
        <div class='button-jumbo'>Create account</div>
        <script>
        function onPasswordChange() {
            var strength = this.value.length * 3;
            var weakPasswords = ['password', '123456', '12345678', '1234', 'qwerty', '12345', 'dragon', 'baseball', 'football', 'letmein', 'security', 'monkey', '696969', 'abc123', '111111', 'ncc2701', 'trustno1'];
            strength += (this.value.match(/[\/;'"\[\]\{\}\-_\!@#\$\\\%\^\&\*\)\(]/g) ? (this.value.match(/[\/;'"\[\]\{\}\-_\!@#\$\\\%\^\&\*\)\(]/g).length * 8 ): 0);
            strength += (this.value.match(/[A-Z]/g) ? (this.value.match(/[A-Z]/g).length * 5) : 0);
            strength += (this.value.match(/[0-9]/g) ? (this.value.match(/[0-9]/g).length * 6) : 0);
            if (weakPasswords.indexOf(this.value.toLowerCase()) !== -1) {
                strength = 5;
            }
            document.getElementById("password-meter").value = strength.toString();
        }
        var pswdElt = document.getElementsByName('password')[0];
        pswdElt.oninput = onPasswordChange;
        pswdElt.onchange = onPasswordChange;
        pswdElt.onkeydown = onPasswordChange;
        </script>
        ''' % ( image_urls['bald_eagle.jpg'], image_urls['pig_in_mud.jpg'], image_urls['cute_golden_retriever.jpg'], image_urls['bison.jpg'], image_urls['default_profile_pic.jpg'], image_urls['horse.jpg'], image_urls['baby_monkey.jpg'], image_urls['cute_fluffy_bunny.jpg'], image_urls['fluffy_kitten.jpg'] )

Answer 1

问题出在这一行：

strength += (this.value.match(/[\/;'"\[\]\{\}\-_\!@#\$\\\%\^\&\*\)\(]/g)

请注意，其中隐藏了%个字符。 python字符串格式化程序查看它，尝试将其解释为（无效）格式说明符%\，并且因为元组中没有匹配的参数，所以抛出该异常。如果你在元组中包含一个额外的参数，你将得到这个例外：

ValueError: unsupported format character '\' (0x5c) at index 2017

答案：通过添加另一个%来逃避未用作格式说明符的任何%个字符：

strength += (this.value.match(/[\/;'"\[\]\{\}\-_\!@#\$\\\%%\^\&\*\)\(]/g)

这将导致字符串格式化程序在输出字符串中留下一个百分比。

Answer 2

你的正则表达式中有％，而python认为它也应该在那里放置值

用%%替换正则表达式中的％，这是你在python

中转义它的方法

字符串不工作的Python百分比运算符

2 个答案: