Question

从具有大型目录树结构的目录运行时，导入pyglet.resource需要很长时间。它发生在简单的单行代码：import pyglet.resource，它在一个足够大的目录（比如我的主目录）中只会导致解释器挂起。

如果导入被 C-c 中断，则会打印以下回溯，表明正在遍历整个目录树：

>>> import pyglet.resource
^CTraceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/pymodules/python2.7/pyglet/__init__.py", line 306, in __getattr__
    __import__(import_name)
  File "/usr/lib/pymodules/python2.7/pyglet/resource.py", line 680, in <module>
    _default_loader = _DefaultLoader()
  File "/usr/lib/pymodules/python2.7/pyglet/resource.py", line 291, in __init__
    self.reindex()
  File "/usr/lib/pymodules/python2.7/pyglet/resource.py", line 335, in reindex
    for dirpath, dirnames, filenames in os.walk(path):
  File "/usr/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/usr/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/usr/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/usr/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/usr/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/usr/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/usr/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/usr/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/usr/lib/python2.7/os.py", line 284, in walk
    if isdir(join(top, name)):
  File "/usr/lib/python2.7/genericpath.py", line 41, in isdir
    st = os.stat(s)
KeyboardInterrupt

^{（可调数量walk次调用，具体取决于脚本运行的时间长度）}

这很令人惊讶，因为导入pyglet.resource实际上不需要遍历脚本的目录。造成这种情况的原因是什么，可以修复还是解决？

版本信息：Python 2.7，Pyglet 1.1.4，Ubuntu 12.04

此问题似乎已在this pyglet-users讨论中进行了描述，其中错误地将其归因于构造pyglet.resource.FileLocation对象。但是，问题实际上发生在像

这样的脚本中隐含导入期间

import pyglet

...

pyglet.resource.FileLocation(...)  # pyglet.resource is imported here;
                                   # FileLocation is not the problem

Answer 1

似乎在Pyglet中将此问题报告为issue #367;它已在revision 9664bc47446c中修复（在1.1.4版之后）。

导入pyglet.resource在大型目录中占用过多的时间

1 个答案: