title: fined directory in Jupiter notebook
body: <p>i have code for classification Sar target</p>
  <pre><code>from keras.layers import Activation, Dropout, Flatten, Dense
  import numpy as np
  from keras import backend as K
  from keras.models import Model
  from keras.callbacks import EarlyStopping
  </code></pre>
  <hr />
  <pre><code>train_data_dir = '..\\data\\train'
  validation_data_dir = '..\\data\\test'
  </code></pre>
  <hr />
  <pre><code>train_generator = train_datagen.flow_from_directory(
          train_data_dir,
          target_size=(img_height, img_width),
          batch_size=batch_size,
          class_mode='categorical')
  </code></pre>
  <p>when the run! i have blew error:</p>
  <pre><code>FileNotFoundError: [WinError 3] The system cannot find the path specified: '..\\data\\train'
  </code></pre>
  <p>help meeee</p>