django启动的时候报了错
py2.7,django1.9
python manage.py runserver
报错如下：
Unhandled exception in thread started by <function wrapper at 0x2d7e410>
Traceback (most recent call last):
File "/root/virtual_dir/wxwebapp_court_nositepkg/lib/python2.7/site-packages/django/utils/autoreload.py", line 226, in wrapper
fn(*args, **kwargs)
.......................省略N多行
File "/usr/local/lib/python2.7/functools.py", line 56, in <lambda>
'__lt__': [('__gt__', lambda self, other: other < self),
.......................省略N多行，重复报上面的错
RuntimeError: maximum recursion depth exceeded in cmp
出错地方是/usr/local/lib/python2.7/functools.py", line 56
找到functools.py看下，56行开始如下：
convert = {
'__lt__': [('__gt__', lambda self, other: other < self),
('__le__', lambda self, other: not other < self),
('__ge__', lambda self, other: not self < other)],
'__le__': [('__ge__', lambda self, other: other <= self),
('__lt__', lambda self, other: not other <= self),
('__gt__', lambda self, other: not self <= other)],
'__gt__': [('__lt__', lambda self, other: other > self),
('__ge__', lambda self, other: not other > self),
('__le__', lambda self, other: not self > other)],
'__ge__': [('__le__', lambda self, other: other >= self),
('__gt__', lambda self, other: not other >= self),
('__lt__', lambda self, other: not self >= other)]
}
因为是新手，lambda的作用我也不是很熟悉，简单的理解就是lambda 后面跟参数，然后冒号后面执行语句，有点像匿名函数的意思
例如：
add=lambda a:a*2
add(2)
输出4
count=lambda a,b:a+b
count(3,6)
输出9
回归正题，修改如下，当然这不是我写的，我在win10运行是正常的，去到centOS就报错了，我就对比下两者之间的差异，发
现两个写的不一样，下面是正常的，我把下面正常的逻辑，覆盖上面错误的逻辑，在centOS可以正常运行了
（就是找到functools.py ，把下面的内容覆盖原来错误的56行那一块内容，我是用xshell和xftp的，直接拿到本地改了放回去）
convert = {
'__lt__': [('__gt__', lambda self, other: not (self < other or self == other)),
('__le__', lambda self, other: self < other or self == other),
('__ge__', lambda self, other: not self < other)],
'__le__': [('__ge__', lambda self, other: not self <= other or self == other),
('__lt__', lambda self, other: self <= other and not self == other),
('__gt__', lambda self, other: not self <= other)],
'__gt__': [('__lt__', lambda self, other: not (self > other or self == other)),
('__ge__', lambda self, other: self > other or self == other),
('__le__', lambda self, other: not self > other)],
'__ge__ ': [('__le__', lambda self, other: (not self >= other) or self == other),
('__gt__', lambda self, other: self >= other and not self == other),
('__lt__', lambda self, other: not self >= other)]
}
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