首页 > 解决方案 > 在 for 循环中使用 str.split 时出现“ValueError 太多值无法解包”

问题描述

我在原因很明显之前就遇到了这个错误,但是我在下面的这段代码中遇到了问题。

#!/usr/bin/python

ACL = 'group:troubleshooters:r,user:auto:rx,user:nrpe:r'

for e in ACL.split(','):
  print 'e = "%s"' % e
  print 'type during split = %s' % type(e.split(':'))
  print 'value during split:  %s' % e.split(':')
  print 'number of elements:  %d' % len(e.split(':'))
  for (one, two, three) in e.split(':'):
      print 'one = "%s", two = "%s"' % (one, two)

我已经添加了这些打印语句以进行调试,并确认拆分正在生成一个 3 元素列表,但是当我尝试将其放入 3 个变量中时,我得到:

e = "group:troubleshooters:r"
type during split = <type 'list'>
value during split:  ['group', 'troubleshooters', 'r']
number of elements:  3
Traceback (most recent call last):
  File "/tmp/python_split_test.py", line 10, in <module>
for (one, two, three) in e.split(':'):
ValueError: too many values to unpack

我错过了什么?

标签: pythonsplitvalueerroriterable-unpacking

解决方案


也许你应该:

one, two, three = e.split(":")

ase.split(":")已经是具有三个值的可迭代对象。

如果你写

for (one, two, three) in something

然后something必须是三个值的可迭代对象,例如[[1, 2, 3], [4, 5, 6]],但不是[1, 2, 3]


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