无效网址：网址不能包含控制字符

Question

我正在遵循本教程：https://medium.com/@yannicksergeobam/plant-disease-classification-with-tensorflow-2-0-268fe7f72c2a 当我在 colab 上运行这部分代码时：

feature_extractor = hub.KerasLayer(MODULE_HANDLE,
input_shape=IMAGE_SIZE+(3,),
output_shape=[FV_SIZE])
do_fine_tuning = False #@param {type:"boolean"}
if do_fine_tuning:
feature_extractor.trainable = True
# unfreeze some layers of base network for fine-tuning
for layer in feature_extractor.layers[-30:]:
layer.trainable =True
else:
feature_extractor.trainable = False
model = tf.keras.Sequential([
feature_extractor,
tf.keras.layers.Flatten(),
tf.keras.layers.Dense(512, activation='relu'),
tf.keras.layers.Dropout(rate=0.2),
tf.keras.layers.Dense(train_generator.num_classes, activation='softmax',
kernel_regularizer=tf.keras.regularizers.l2(0.0001))
])

我收到此错误：

---------------------------------------------------------------------------
InvalidURL                                Traceback (most recent call last)
<ipython-input-16-7f860a0e8414> in <module>()
1 feature_extractor = hub.KerasLayer(MODULE_HANDLE,
2                                    input_shape=IMAGE_SIZE+(3,),
----> 3                                    output_shape=[FV_SIZE])
4 do_fine_tuning = True #@param {type:"boolean"}
5 if do_fine_tuning:
14 frames
/usr/lib/python3.6/http/client.py in putrequest(self, method, url, skip_host, skip_accept_encoding)
1125         match = _contains_disallowed_url_pchar_re.search(url)
1126         if match:
-> 1127             raise InvalidURL(f"URL can't contain control characters. {url!r} "
1128                              f"(found at least {match.group()!r})")
1129         request = '%s %s %s' % (method, url, self._http_vsn_str)
InvalidURL: URL can't contain control characters. '/google/tf2- preview/inception_v3/feature_vector/2?tf-hub-format=compressed' (found at least ' ')

不幸的是，我在谷歌上找不到可以帮助我的东西。从我认识的小蟒蛇身上，我找不到错误......你能帮忙吗？

Answer 1

请改用这个：

pixels = 299
FV_SIZE = 2048
MODULE_HANDLE = "https://tfhub.dev/google/tf2- 
preview/inception_v3/feature_vector/4"
IMAGE_SIZE = (pixels, pixels)
BATCH_SIZE = 64

Answer 2

在MODULE_HANDLE变量中，其值中有空格：

"https://tfhub.dev/google/tf2-预览/inception_v3/feature_vector/4">

空格位于"TF2-"和"预览"之间。 您只需要删除空格。

发生此错误是因为 urllib 不喜欢 url 中的空格。