title: How to remove 'file does not exist' error in python 35
body: <p>I was executing this code when i encountered this error related to file not found. 
  File exists in the same folder where code resides, bu still this error is not going. 
  Please help!</p>
  
  <p>code:</p>
  
  <pre><code>import datetime as dt
  import matplotlib.pyplot as plt
  from matplotlib import style
  from matplotlib.finance import candlestick_ohlc
  import matplotlib.dates as mdates
  import pandas as pd
  import pandas_datareader.data as web
  import numpy as np
  
  style.use('ggplot')
  df= pd.read_csv('nse2.csv', parse_dates=True, index_col=0)
  df_ohlc= df['close'].resample('10D').ohlc()
  df_ohlc.reset_index(inplace=True)
  print(df_ohlc.head())
  ax1 = plt.subplot2grid((6,1),(0,0), rowspan=5, colspan=1)
  ax2 = plt.subplot2grid((6,1),(5,0), rowspan=1, colspan=1, sharex=ax1)
  ax1.xaxis_date()
  candlestick_ohlc(ax1,df_ohlc.values, width=2, colorup='g')
  plt.show()
  </code></pre>
  
  <p>Here is the Error:</p>
  
  <blockquote>
    <p>Traceback (most recent call last):</p>
    
    <p>File "F:\Report on Artificial Intelligence\candlestick code\c5.py",
    line 13, in     df= pd.read_csv('nse2.csv', parse_dates=True,
    index_col=0)   File "C:\Program
    Files\Python35\lib\site-packages\pandas\io\parsers.py", line 498, in
    parser_f</p>
    
    <p>return _read(filepath_or_buffer, kwds)   File "C:\Program
    Files\Python35\lib\site-packages\pandas\io\parsers.py", line 275, in
    _read
        parser = TextFileReader(filepath_or_buffer, **kwds)   File "C:\Program Files\Python35\lib\site-packages\pandas\io\parsers.py",
    line 590, in <strong>init</strong>
        self._make_engine(self.engine)   File "C:\Program Files\Python35\lib\site-packages\pandas\io\parsers.py", line 731, in
    _make_engine
        self._engine = CParserWrapper(self.f, **self.options)   File "C:\Program Files\Python35\lib\site-packages\pandas\io\parsers.py",
    line 1103, in <strong>init</strong>
        self._reader = _parser.TextReader(src, **kwds)   File "pandas\parser.pyx", line 353, in pandas.parser.TextReader.<strong>cinit</strong>
    (pandas\parser.c:3246)   File "pandas\parser.pyx", line 591, in
    pandas.parser.TextReader._setup_parser_source (pandas\parser.c:6111)
    OSError:</p>
  </blockquote>
  
  <p>This is the main error </p>
  
  <blockquote>
    <p>->" File b'nse2.csv' does not exist"</p>
  </blockquote>