title: ValueError: arrays must all be same length in Pandas
body: <p>I was following <a href="https://www.youtube.com/watch?v=0UA49Ds1XXo" rel="nofollow noreferrer">Sentdex's second tutorial on pandas basics</a>, and ran into this problem. Here's my code up to this point:</p>
  
  <pre><code>import pandas as pd
  import matplotlib.pyplot as plt
  from matplotlib import style
  style.use('ggplot')
  
  web_stats = {'Day' : [1,2,3,4,5,6],
               'Visitors' : [43,53,34,45,64,34],
               'Bounce_Rate' : [65,72,62,64,66]}
  
  df = pd.DataFrame(web_stats)
  
  print(df)
  </code></pre>
  
  <p>I was really confused when this error message popped up. Please note that I'm on a mac.</p>
  
  <pre><code>Traceback (most recent call last):
    File "/Users/Terry/Documents/df.py", line 10, in &lt;module&gt;
      df = pd.DataFrame(web_stats)
    File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/core/frame.py", line 275, in __init__
      mgr = self._init_dict(data, index, columns, dtype=dtype)
    File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/core/frame.py", line 411, in _init_dict
      return _arrays_to_mgr(arrays, data_names, index, columns, dtype=dtype)
    File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/core/frame.py", line 5496, in _arrays_to_mgr
      index = extract_index(arrays)
    File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/core/frame.py", line 5544, in extract_index
      raise ValueError('arrays must all be same length')
  ValueError: arrays must all be same length
  &gt;&gt;&gt; 
  </code></pre>
  
  <p>Any help would be much appreciated.</p>