[英]Difficulty converting a list: 'str' object has no attribute 'items'
I am trying to create a classifier using NLTK, however, I believe that I have a problem in the format of my data that I cannot get over.我正在尝试使用 NLTK 创建一个分类器,但是,我相信我的数据格式存在无法克服的问题。
My data looks like this:我的数据如下所示:
data = [("TEXT 1", 'no'), ("TEXT 2", 'yes'), ("TEXT 3", 'no'), ("TEXT 4", 'no'), ("TEXT 5", 'yes')]
Then, I run the following code:然后,我运行以下代码:
import nltk
from nltk.classify import maxent
classifier = maxent.MaxentClassifier.train(data, bernoulli=False, max_iter=10)
But, unfortunately I have the following error.但是,不幸的是我有以下错误。 What does this error consist of and how do I overcome it?
这个错误是由什么组成的,我该如何克服它?
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-93-e1b29adbeebb> in <module>
----> 1 classifier = maxent.MaxentClassifier.train(data, bernoulli=False, max_iter=10)
/usr/local/lib/python3.8/dist-packages/nltk/classify/maxent.py in train(cls, train_toks, algorithm, trace, encoding, labels, gaussian_prior_sigma, **cutoffs)
324 algorithm = algorithm.lower()
325 if algorithm == "iis":
--> 326 return train_maxent_classifier_with_iis(
327 train_toks, trace, encoding, labels, **cutoffs
328 )
/usr/local/lib/python3.8/dist-packages/nltk/classify/maxent.py in train_maxent_classifier_with_iis(train_toks, trace, encoding, labels, **cutoffs)
1175 # Construct an encoding from the training data.
1176 if encoding is None:
-> 1177 encoding = BinaryMaxentFeatureEncoding.train(train_toks, labels=labels)
1178
1179 # Count how many times each feature occurs in the training data.
/usr/local/lib/python3.8/dist-packages/nltk/classify/maxent.py in train(cls, train_toks, count_cutoff, labels, **options)
665
666 # Record each of the features.
--> 667 for (fname, fval) in tok.items():
668
669 # If a count cutoff is given, then only add a joint
AttributeError: 'str' object has no attribute 'items'
From the documentation:从文档中:
train(train_toks, algorithm=None, trace=3, encoding=None, labels=None, gaussian_prior_sigma=0, **cutoffs)
train(train_toks, algorithm=None, trace=3, encoding=None, 标签=None, gaussian_prior_sigma=0, **cutoffs)
Parameters train_toks (list) – Training data, represented as a list of pairs, the first member of which is a featureset , and the second of which is a classification label.
参数 train_toks (list) – 训练数据,表示为对列表,其中第一个成员是特征集,第二个成员是分类 label。
Your tuples need to have the first element be a dict
that "map[s] strings to either numbers, booleans or strings" then you need to have your second element be the classification label.您的元组需要第一个元素是“将 [s] 字符串映射到数字、布尔值或字符串”的
dict
,然后您的第二个元素需要是分类 label。
from nltk.classify import maxent
data = [({"TEXT 1": 'no'}, "Label")]
classifier = maxent.MaxentClassifier.train(data, bernoulli=False, max_iter=10)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.