Import Error: 无法导入 name’_ valid_ length’

我已经开始学习张量流了。我正在使用 Pycharm，我的环境是 Ubuntu 16.04。我在跟踪 教程。我交叉比对了数字。这是最新的。我不知道这个错误的原因。

来自 numpy.lib.arraypad import _ valid_ length

Import Error: 无法导入 name’_ valid_ length’

需要提示来解决这个错误。谢谢。

import tensorflow as tf
from skimage import transform
from skimage import data
import matplotlib.pyplot as plt
import os
import numpy as np
from skimage.color import rgb2gray
import random


#listdir: This method returns a list containing the names of the entries in the directory given by path.
# Return True if path is an existing directory


def load_data(data_dir):
# Get all subdirectories of data_dir. Each represents a label.
directories = [d for d in os.listdir(data_dir)
if os.path.isdir(os.path.join(data_dir, d))]
# Loop through the label directories and collect the data in
# two lists, labels and images.
labels = []
images = []
for d in directories:
label_dir = os.path.join(data_dir, d)
file_names = [os.path.join(label_dir, f)
for f in os.listdir(label_dir)
if f.endswith(".ppm")]
for f in file_names:
images.append(data.imread(f))
labels.append(int(d))
return images, labels




ROOT_PATH = "/home/tahir/PhD Study/Traffic Signs Using Tensorflow/"
train_data_dir = os.path.join(ROOT_PATH, "TrafficSigns/Training")
test_data_dir = os.path.join(ROOT_PATH, "TrafficSigns/Testing")


images, labels = load_data(train_data_dir)


# Print the `images` dimensions
print(images.ndim)


# Print the number of `images`'s elements
print(images.size)


# Print the first instance of `images`
images[0]