title: None of ['date'] are in the columns
body: <p>I'm trying to plot some graphs with numpy and plotly. I'm getting the data from a csv file containing all the trends that I need. I want to plot and analyze the values contained in columns 1-80 along the timeframe (&quot;Date&quot;)
  Here's the script I've written to do that.</p>
  <pre class="lang-py prettyprint-override"><code>import matplotlib.pyplot as plt
  
  import numpy as np
  
  import pandas as pd
  
  import seaborn as sns
  
  import plotly.express as px
  
  ztec = pd.read_csv(r'C:\Users\tashkpa\Desktop\Работа\ТЭЦ\Сырые данные ЗТЭЦ\данные для python.csv')
  
  ztec=ztec.set_index('Date')
  
  print(ztec)
  
  fig=plt.figure()
  
  ax=fig.add_subplot()
  
  sns.set_style(&quot;ticks&quot;, {'grid.linestyle': '--'})
  
  sns.lineplot(x=ztec['Date'], y=ztec['01'])
  
  plt.grid(True, which=&quot;both&quot;, ls=&quot;--&quot;, c='gray')
  
  plt.plot
  </code></pre>
  <p>A sample of my array looks like this:</p>
  <pre class="lang-none prettyprint-override"><code>'Date';'01';'02';'03';'04';'05';'06';'07';'08';'09';'10';'11';'12';'13';'14';'15';'16';'17';'18';'19';'20';'21';'22';'23';'24';'25';'26';'27';'28';'29';'30';'31';'32';'33';'34';'35';'36';'37';'38';'39';'40';'41';'42';'43';'44';'45';'46';'47';'48';'49';'50';'51';'52';'53';'54';'55';'56';'57';'58';'59';'60';'61';'62';'63';'64';'65';'66';'67';'68';'69';'70';'71';'72';'73';'74';'75';'76';'77';'78';'79';'80';;;;;;;;;;;;;
  01/01/2021 02:00:00;0.791;7.019;199.265;183.586;506.253;5.641;41.729;212.521;0.528;0.115;32.356;35.264;0.788;208.541;0.356;0.348;0.087;3.887;3.483;8.784;31.930;13.237;24.296;13.552;23.546;36.840;36.978;218.913;35.373;0.860;0.147;0.319;115.694;0.785;7.064;201.466;183.316;509.751;5.721;42.600;210.235;0.563;12.276;60.000;135.939;0.784;206.678;0.347;0.334;0.066;3.959;4.138;4.821;8.027;13.494;18.367;13.702;18.536;30.446;31.199;243.470;1.908;0.901;2.082;0.216;106.911;3.681;-1.484;205.884;284.659;146.202;3.681;-9.315;56.252;54.483;40195.012;39724.953;102.121;128.471;102.573;;;;;;;;;;;;;
  </code></pre>
  <p>Here's the exception that Python fires.</p>
  <pre class="lang-none prettyprint-override"><code>C:\Users\tashkpa\Anaconda3\python.exe C:/Users/tashkpa/PycharmProjects/pythonProject/zteccsv.py
  Traceback (most recent call last):
    File &quot;C:/Users/tashkpa/PycharmProjects/pythonProject/zteccsv.py&quot;, line 7, in &lt;module&gt;
      ztec=ztec.set_index('Date')
    File &quot;C:\Users\tashkpa\AppData\Roaming\Python\Python38\site-packages\pandas\core\frame.py&quot;, line 4724, in set_index
      raise KeyError(f&quot;None of {missing} are in the columns&quot;)
  KeyError: &quot;None of ['Date'] are in the columns&quot;
  </code></pre>
  <p>How could I bypass this error?</p>