title: File b'train.csv' does not exist even though file exist
body: <p>Code:</p>
  
  <pre><code>import pandas as pd
  train_df = pd.read_csv("train.csv")
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>FileNotFoundError                   Traceback (most recent call last)
      &lt;ipython-input-17-05c7c432b69f&gt; in &lt;module&gt;()
        1 import pandas as pd
        2 
      ----&gt; 3 train_df = pd.read_csv("../input/train.csv")
  
      /anaconda3/lib/python3.6/site-packages/pandas/io/parsers.py in parser_f(filepath_or_buffer, sep, delimiter, header, names, index_col, usecols, squeeze, prefix, mangle_dupe_cols, dtype, engine, converters, true_values, false_values, skipinitialspace, skiprows, nrows, na_values, keep_default_na, na_filter, verbose, skip_blank_lines, parse_dates, infer_datetime_format, keep_date_col, date_parser, dayfirst, iterator, chunksize, compression, thousands, decimal, lineterminator, quotechar, quoting, escapechar, comment, encoding, dialect, tupleize_cols, error_bad_lines, warn_bad_lines, skipfooter, skip_footer, doublequote, delim_whitespace, as_recarray, compact_ints, use_unsigned, low_memory, buffer_lines, memory_map, float_precision)
      707                     skip_blank_lines=skip_blank_lines)
      708 
      --&gt; 709         return _read(filepath_or_buffer, kwds)
      710 
      711     parser_f.__name__ = name
  
      /anaconda3/lib/python3.6/site-packages/pandas/io/parsers.py in _read(filepath_or_buffer, kwds)
      447 
      448     # Create the parser.
      --&gt; 449     parser = TextFileReader(filepath_or_buffer, **kwds)
      450 
      451     if chunksize or iterator:
  
      /anaconda3/lib/python3.6/site-packages/pandas/io/parsers.py in __init__(self, f, engine, **kwds)
      816             self.options['has_index_names'] = kwds['has_index_names']
      817 
      --&gt; 818         self._make_engine(self.engine)
      819 
      820     def close(self):
  
      /anaconda3/lib/python3.6/site-packages/pandas/io/parsers.py in _make_engine(self, engine)
      1047     def _make_engine(self, engine='c'):
      1048         if engine == 'c':
      -&gt; 1049             self._engine = CParserWrapper(self.f, **self.options)
      1050         else:
      1051             if engine == 'python':
  
      /anaconda3/lib/python3.6/site-packages/pandas/io/parsers.py in __init__(self, src, **kwds)
      1693         kwds['allow_leading_cols'] = self.index_col is not False
      1694 
      -&gt; 1695         self._reader = parsers.TextReader(src, **kwds)
      1696 
      1697         # XXX
  
      pandas/_libs/parsers.pyx in pandas._libs.parsers.TextReader.__cinit__()
  
      pandas/_libs/parsers.pyx in      pandas._libs.parsers.TextReader._setup_parser_source()
  
  FileNotFoundError: File b'../input/train.csv' does not exist
  </code></pre>
  
  <p>Please help! I tried using <code>pd.read_csv("../input/train.csv")</code> but there is still an error. I am a Mac user using Jupyter notebook.</p>