title: python 3.5: OSError: [Errno 22] Invalid argument: 'E:\\python\\Sales prog\nacenka.xlsx'
body: <p>Have a nice error.</p>
  
  <pre><code>import pandas as pd
  import xgboost as xgb
  sales_shop = pd.read_excel('E:\python\Sales prog\sales.xlsx', index_col = "date")
  holidays = pd.read_excel('E:\python\Sales prog\holidays common.xlsx', index_col = "date")
  datecom = pd.read_excel('E:\python\Sales prog\date.xlsx', index_col = "date")
  nacenka = pd.read_excel('E:\python\Sales prog\nacenka.xlsx', index_col = "date")
  </code></pre>
  
  <p>Error text:</p>
  
  <blockquote>
    <p>OSError: [Errno 22] Invalid argument: 'E:\python\Sales
    prog\nacenka.xlsx'</p>
  </blockquote>
  
  <p>But if i write:</p>
  
  <pre><code>import pandas as pd
  import xgboost as xgb
  sales_shop = pd.read_excel('E:\python\Sales prog\sales.xlsx', index_col = "date")
  holidays = pd.read_excel('E:\python\Sales prog\holidays common.xlsx', index_col = "date")
  datecom = pd.read_excel('E:\python\Sales prog\date.xlsx', index_col = "date")
  nacenka = pd.read_excel('E:/python/Sales prog/nacenka.xlsx', index_col = "date") 
  </code></pre>
  
  <p>I don't have a trouble... But how? I just changed the slope, And in others he remained the same. </p>