问题描述
当我尝试使用get_reviews fn时，它在 <form method = "POST" action="/proxy_settings">
{% if proxy_mode == '0' %}
<input type="radio" name="proxy_mode" value = '0' checked=true>Auto
{% else %}
<input type="radio" name="proxy_mode" value = '0'>Auto
{% endif %}
<br>
{% if proxy_mode == '1' %}
<input type="radio" name="proxy_mode" value = '1' checked=true>Manual
{% else %}
<input type="radio" name="proxy_mode" value = '1'>Manual
{% endif %}
<br>
<br>
<section>
<table border="1">
<tr>
<td>Description</td>
<td>delay</td>
<td>select</td>
</tr>
{% for node_name,node_delay in node_list.items() %}
<tr>
<td>{{node_name}}</td>
<td>{{node_delay}}</td>
{% if loop.index0 == proxy_node|int %}
<td><input type="radio" name="proxy_node" value={{loop.index0}} checked=true></td>
{% else %}
<td><input type="radio" name="proxy_node" value={{loop.index0}}></td>
{% endif %}
</tr>
{% endfor %}
</table>
</section>
<br>
<section>
<button type="submit">CONFIRM</button>
</section>
</form>
处给了我错误，说f.read.decode()没有函数解码，当我删除了str时又给了我指定错误的错误第一个错误。
.decode()错误：
def get_reviews(dirname,positive=True ):
label = 1 if positive else 0
reviews = []
for filename in os.listdir(dirname):
if filename.endswith(".txt"):
with open(dirname + filename,"r+") as f:
review = f.read().decode('utf-8')#we decoding text as utf 8
review = review.lower().replace("<br />"," ")
review = re.sub(token_regex,"",review)
#returning a tuple of the reviews text and lable for
#wheather it a positive or negative review
reviews.append([review,label])
return reviews
这是我尝试删除.decode（）时遇到的第二个错误，如果删除.decode（）则出现以下错误。
AttributeError Traceback (most recent call last)
<ipython-input-6-92e2ebb79bdf> in <module>()
----> 1 positive_reviews,negative_reviews=extract_reviews()
<ipython-input-5-233b24b569a3> in extract_reviews()
22 tar.extractall()
23 tar.close()
---> 24 positive_reviews = get_reviews("aclimdb/train/pos/",positive = True)
25 negative_reviews = get_reviews("aclimdb/train/neg/",positive=False)
26
<ipython-input-5-233b24b569a3> in get_reviews(dirname,positive)
7 with open(dirname + filename,"r+") as f:
8
----> 9 review = f.read().decode('utf-8')#we decoding text as utf 8
10 review = review.lower().replace("<br />"," ")#converting it to lower case and removing spaces
11 review = re.sub(token_regex,review) #and surbbing the sentenses having special characters
AttributeError: 'str' object has no attribute 'decode'
解决方法
读取文件时，应使用utf-8-sig而不是utf-8。那应该可以解决问题。