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我正在学习第 1 课（http://nbviewer.jupyter.org/urls/bitbucket.org/hrojas/learn-pandas/raw/master/lessons/01%20-%20Lesson.ipynb）在 Jupyter 中使用 Pandas来自 Anaconda 的控制台。

我正在尝试将 DataFrame (dict) 导出到 CSV 文件，这是我的代码，它与第 1 课中的说明相匹配：

df.to_csv('births1880.csv',index=False,header=False)

我正在拔头发，因为我一直收到错误消息，我不知道为什么。这是错误消息：

PermissionError                           Traceback (most recent call last)
<ipython-input-29-cb4a3386d140> in <module>()
----> 1 df.to_csv('births1880.csv',index=False,header=False)

/Applications/anaconda/lib/python3.5/site-packages/pandas/core/frame.py in to_csv(self, path_or_buf, sep, na_rep, float_format, columns, header, index, index_label, mode, encoding, compression, quoting, quotechar, line_terminator, chunksize, tupleize_cols, date_format, doublequote, escapechar, decimal, **kwds)
   1342                                      doublequote=doublequote,
   1343                                      escapechar=escapechar, decimal=decimal)
-> 1344         formatter.save()
   1345 
   1346         if path_or_buf is None:

/Applications/anaconda/lib/python3.5/site-packages/pandas/formats/format.py in save(self)
   1524             f = _get_handle(self.path_or_buf, self.mode,
   1525                             encoding=self.encoding,
-> 1526                             compression=self.compression)
   1527             close = True
   1528 

/Applications/anaconda/lib/python3.5/site-packages/pandas/io/common.py in _get_handle(path, mode, encoding, compression)
    422                 f = open(path, mode, encoding=encoding)
    423             else:
--> 424                 f = open(path, mode, errors='replace')
    425         else:
    426             f = open(path, mode)

PermissionError: [Errno 13] Permission denied: 'births1880.csv'
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