Python 在终端中使用 .csv 文件

Question

我编写了以下脚本，在使用 pyCharm 时可以完美运行，但是当我在终端中运行它时，它会出现以下错误:

  File "/Users/Chris/PycharmProjects/firstfile/trial.py", line 6, in <module>
    r = pf.read_csv('python.csv')
  File "/usr/local/lib/python2.7/site-packages/pandas/io/parsers.py", line 562, in parser_f
    return _read(filepath_or_buffer, kwds)
  File "/usr/local/lib/python2.7/site-packages/pandas/io/parsers.py", line 315, in _read
    parser = TextFileReader(filepath_or_buffer, **kwds)
  File "/usr/local/lib/python2.7/site-packages/pandas/io/parsers.py", line 645, in __init__
    self._make_engine(self.engine)
  File "/usr/local/lib/python2.7/site-packages/pandas/io/parsers.py", line 799, in _make_engine
    self._engine = CParserWrapper(self.f, **self.options)
  File "/usr/local/lib/python2.7/site-packages/pandas/io/parsers.py", line 1213, in __init__
    self._reader = _parser.TextReader(src, **kwds)
  File "pandas/parser.pyx", line 358, in pandas.parser.TextReader.__cinit__ (pandas/parser.c:3427)
  File "pandas/parser.pyx", line 628, in pandas.parser.TextReader._setup_parser_source (pandas/parser.c:6861)
IOError: File python.csv does not exist

有人能指出正确的方向吗？我猜这与 csv 文件不在正确的路径或目录中有关。现在我将 csv 文件保存在与我的 .py 项目相同的文件夹中。我还检查并确保安装了正确的软件包，所以我不认为是这样。

import csv
import pandas as pf

r = pf.read_csv('python.csv')
r.head()

print r.describe()
tradeDates = r['Trade Date'].unique()

r.name = 'Trade Date'
for trades in tradeDates:
outfilename = trades
printName = outfilename + ".csv"
print printName
r[r['Trade Date'] == trades].to_csv(printName, index=False)

Answer 1

当您运行 python/Users/Chris/PycharmProjects/firstfile/trial.py 时，python 在当前目录中查找 csv 文件，而不是在 /Users/Chris/PycharmProjects/firstfile。您要么需要在运行代码之前更改目录，要么需要像这样在 trial.py 中使用完整路径:

import csv
import pandas as pf

r = pf.read_csv('/Users/Chris/PycharmProjects/firstfile/python.csv')
r.head()