python: Unicode equal comparison failed to convert both arguments to Unicode

Question

I have a dict and want to search in it.

test = dict({u'K\xfcndigung' : 123})
tmpKey = str('K\xfcndigung')
print(test[tmpKey])

It results in:

UnicodeWarning: Unicode equal comparison failed to convert both 
arguments to Unicode - interpreting them as being unequal

Should have been flagged as a duplicate of https://stackoverflow.com/questions/18193305/python-unicode-equal-comparison-failed — Alastair Irvine, Jul 26 '17 at 10:12

score 0 · Answer 1 · answered Mar 20 '17 at 09:01

It seems you are using Python2, :

>>> test[tmpKey]

Warning (from warnings module):
  File "__main__", line 1
UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal

Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    test[tmpKey]
KeyError: 'K\xfcndigung'

Well in Python2, str are not unicode as opposed in Python3, thus make tmpKey as a unicode object instead:

>>> tmpKey = u'K\xfcndigung'
>>> #        ^
>>> 
>>> test[tmpKey]
123

python: Unicode equal comparison failed to convert both arguments to Unicode

1 Answers1