[英]How to convert List to numpy Array
这是合作https://colab.research.google.com/drive/1wftAvDu_Wu2Y9ahgI1Z1FLciUH5MnSJ9的链接
train_labels = ['GovernmentSchemes', 'GovernmentSchemes', 'GovernmentSchemes', 'GovernmentSchemes', 'CropInsurance']
training_label_seq = np.array(label_tokenizer.texts_to_sequences(train_labels))
output 来了:
[list([3]) list([3]) list([3]) ... list([2]) list([5]) list([1])]
预期 output:
[[3] [3] [3] .. [2] [5]...]
num_epochs = 30
history = model.fit(train_padded, training_label_seq, epochs=num_epochs, validation_data=(validation_padded, validation_label_seq))
错误 => ValueError:无法将 NumPy 数组转换为张量(不支持的 object 类型列表)
我能够使用以下代码重新创建您的问题 -
重新创建问题的代码 -
import numpy as np
import tensorflow as tf
print(tf.__version__)
from tensorflow.keras.preprocessing.text import Tokenizer
label_tokenizer = Tokenizer()
# Fit on a text
fit_text = "Tensorflow warriors are awesome people"
label_tokenizer.fit_on_texts(fit_text)
# Training Labels
train_labels = "Tensorflow warriors are great people"
training_label_list = np.array(label_tokenizer.texts_to_sequences(train_labels))
# Print the
print(training_label_list)
print(type(training_label_list))
print(type(training_label_list[0]))
Output -
2.2.0
[list([9]) list([1]) list([10]) list([5]) list([3]) list([2]) list([11])
list([7]) list([3]) list([6]) list([]) list([6]) list([4]) list([2])
list([2]) list([12]) list([3]) list([2]) list([5]) list([]) list([4])
list([2]) list([1]) list([]) list([4]) list([2]) list([1]) list([])
list([]) list([2]) list([1]) list([4]) list([9]) list([]) list([8])
list([1]) list([3]) list([8]) list([7]) list([1])]
<class 'numpy.ndarray'>
<class 'list'>
解决方案 -
np.array
替换np.hstack
将解决您的问题。 您的model.fit()
现在应该可以正常工作了。training_label_list = label_tokenizer.texts_to_sequences(train_labels)
将为您提供一个列表列表。 您可以使用np.array([np.array(i) for i in training_label_list])
转换为数组数组。 仅当您的列表列表包含具有相同数量元素的列表时,这才有效。np.hstack Code -解决方案中第 1 点的代码。
import numpy as np
import tensorflow as tf
print(tf.__version__)
from tensorflow.keras.preprocessing.text import Tokenizer
label_tokenizer = Tokenizer()
# Fit on a text
fit_text = "Tensorflow warriors are awesome people"
label_tokenizer.fit_on_texts(fit_text)
# Training Labels
train_labels = "Tensorflow warriors are great people"
training_label_list = np.hstack(label_tokenizer.texts_to_sequences(train_labels))
# Print the
print(training_label_list)
print(type(training_label_list))
print(type(training_label_list[0]))
Output -
2.2.0
[ 9. 1. 10. 4. 2. 3. 11. 7. 2. 5. 5. 6. 3. 3. 12. 2. 3. 4.
6. 3. 1. 3. 1. 6. 9. 8. 1. 2. 8. 7. 1.]
<class 'numpy.ndarray'>
<class 'numpy.float64'>
预期 output 有问题 -解决方案中第 2 点的代码。
import numpy as np
import tensorflow as tf
print(tf.__version__)
from tensorflow.keras.preprocessing.text import Tokenizer
label_tokenizer = Tokenizer()
# Fit on a text
fit_text = "Tensorflow warriors are awesome people"
label_tokenizer.fit_on_texts(fit_text)
# Training Labels
train_labels = "Tensorflow warriors are great people"
training_label_list = label_tokenizer.texts_to_sequences(train_labels)
# Print
print(training_label_list)
print(type(training_label_list))
print(type(training_label_list[0]))
# To convert elements to array
training_label_list = np.array([np.array(i) for i in training_label_list])
# Print
print(training_label_list)
print(type(training_label_list))
print(type(training_label_list[0]))
Output -
2.2.0
[[9], [1], [10], [4], [2], [3], [11], [7], [2], [5], [], [5], [6], [3], [3], [12], [2], [3], [4], [], [6], [3], [1], [], [], [3], [1], [6], [9], [], [8], [1], [2], [8], [7], [1]]
<class 'list'>
<class 'list'>
[array([9]) array([1]) array([10]) array([4]) array([2]) array([3])
array([11]) array([7]) array([2]) array([5]) array([], dtype=float64)
array([5]) array([6]) array([3]) array([3]) array([12]) array([2])
array([3]) array([4]) array([], dtype=float64) array([6]) array([3])
array([1]) array([], dtype=float64) array([], dtype=float64) array([3])
array([1]) array([6]) array([9]) array([], dtype=float64) array([8])
array([1]) array([2]) array([8]) array([7]) array([1])]
<class 'numpy.ndarray'>
<class 'numpy.ndarray'>
希望这能回答你的问题。 快乐学习。
更新 2/6/2020 - Anirudh_k07 ,根据我们的讨论,我查看了您的程序,在使用np.hstack
作为标签后,您在model.fit()
中遇到错误。
ValueError: Data cardinality is ambiguous:
x sizes: 41063
y sizes: 41429
Please provide data which shares the same first dimension.
您收到此错误是因为很少有标签具有-
和/
等特殊字符。 因此,在执行np.hstack(label_tokenizer.texts_to_sequences(train_labels)
时,他们正在创建额外的行。您可以使用print(set(train_labels))
唯一train_labels
列表。
这是我想说的要点-
# These Labels have special character
train_labels = ['Bio-PesticidesandBio-Fertilizers','Old/SenileOrchardRejuvenation']
training_label_seq = np.hstack(label_tokenizer.texts_to_sequences(train_labels))
print("Two labels are converted to Five :",training_label_seq)
# These Labels are fine
train_labels = ['SoilHealthCard', 'PostHarvestPreservation', 'FertilizerUseandAvailability']
training_label_seq = np.hstack(label_tokenizer.texts_to_sequences(train_labels))
print("Three labels are remain three :",training_label_seq)
Output -
Two labels are converted to Five : [17 18 19 51 52]
Three labels are remain three : [20 36 5]
因此,请进行适当的预处理并消除train_labels
中的这些特殊字符,然后在标签上使用np.hstack(label_tokenizer.texts_to_sequences(train_labels))
。 之后,您的model.fit()
应该可以正常工作。
希望这能回答你的问题。 快乐学习。
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