title: Python/Pandas DataFrame.Drop can't recognize column name in Chinese Characters
body: <p>Here is the Jupyter script. Any suggestion why the "Does NOT work" in the following? </p>
  
  <pre><code>import pandas as pd
  df = pd.read_csv('hw1.csv', encoding='utf-8', skipinitialspace=True )
  df.drop(['序号'], axis=1, inplace=True) # &lt;= Works
  #df.drop(['年度'], axis=1, inplace=True) # &lt;= Does NOT work
  df
  </code></pre>
  
  <p>----- hw1.csv file -----
  序号,﻿年度,﻿直接排放,﻿间接排放,﻿直接排放间接排放,﻿一般烟煤,﻿汽油,﻿柴油,﻿液化石油气,﻿炼厂干气,﻿天然气
  1,2016,4647.09,4843.06,9490.15,2004.98,,136.08,13.9,,45.1816
  2,2016,2496.72,3668.16,6164.879999999999,1368.83,,,28.02,,10.593
  3,2016,10729.74,4042.2,14771.94,6681.8,,,20.6,,
  4,2016,231163.34,206918.68,438082.02,52330.48,,13758.75,997.81,,4690.22
  5,2016,7373.27,4994.84,12368.11,3566.25,,,123.6,,60.9229
  6,2016,62619.53,3324.15,65943.68,,,,,,2896.1175</p>