Eclipse 中的 Python 错误 : SyntaxError: future feature print_function is not defined

Question

我正在尝试让 python 在 Eclipse 中与我一起工作。我确实下载了 Pydev 并编写了一个小的 python 代码。

我的Python版本是:Python 2.7.6在我的 Mac OS X 10.9.2 上

我现在收到的错误是(顺便说一句，我在使用 Jython 2.5.4rc1 和 Python 解释器时收到此错误):

Traceback (most recent call last):
  File "/Users/ha/EclipseProjects/PythonNLTK/Code.py", line 11, in <module>
    import nltk
  File "/Library/Python/2.7/site-packages/nltk/__init__.py", line 99, in <module>
    from collocations import *
  File "/Library/Python/2.7/site-packages/nltk/collocations.py", line 38, in <module>
    from nltk.metrics import ContingencyMeasures, BigramAssocMeasures, TrigramAssocMeasures
  File "/Library/Python/2.7/site-packages/nltk/metrics/__init__.py", line 23, in <module>
    from nltk.metrics.segmentation    import windowdiff, ghd, pk
  File "/Library/Python/2.7/site-packages/nltk/metrics/segmentation.py", line 45, in <module>
    import numpy
  File "/Library/Python/2.7/site-packages/nltk/metrics/segmentation.py", line 45, in <module>
    import numpy
  File "/Library/Python/2.7/site-packages/numpy/__init__.py", line 107
SyntaxError: future feature print_function is not defined

如何解决？

Answer 1

只有 python 2.7+ 具有 print_function future import。

如果您升级到Jython 2.7 Beta 2我打赌这个问题将会得到解决