CODEWITHSUNDEEP
pythonunicode
Adam Parkin
Adam Parkin

Reputation: 18720

Python Unicode Error With % Operator

Not sure what I'm doing wrong here, but with this:

# -*- coding: utf-8 -*-

class Foo(object):
    CURRENCY_SYMBOL_MAP = {"CAD":'$', "USD":'$', "GBP" : "£"}

    def bar(self, value, symbol="GBP"):
        result = u"%s%s" % (self.CURRENCY_SYMBOL_MAP[symbol], value)
        return result

if __name__ == "__main__":
    f = Foo()
    print f.bar(unicode("19.00"))

I get:

Traceback (most recent call last):
  File "test.py", line 11, in <module>
    print f.bar(unicode("19.00"))
  File "test.py", line 7, in bar
    result = u"%s%s" % (self.CURRENCY_SYMBOL_MAP[symbol], value)
  UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 0: ordinal not in range(128)

This is with Python 2.7.6

PS - I get that there are libraries like Babel for formmatting things as currency, my question is more with respect to unicode strings and the % operator.

Upvotes: 0

Views: 75

Answers (2)

Danny Dyla
Danny Dyla

Reputation: 691

You are attempting to insert a non-unicode string into a unicode string. You just have to make the values in CURRENCY_SYMBOL_MAP unicode objects.

# -*- coding: utf-8 -*-

class Foo(object):
    CURRENCY_SYMBOL_MAP = {"CAD":u'$', "USD":u'$', "GBP" : u"£"}  # this line is the difference

    def bar(self, value, symbol="GBP"):
        result = u"%s%s" % (self.CURRENCY_SYMBOL_MAP[symbol], value)
        return result

if __name__ == "__main__":
    f = Foo()
    print f.bar(unicode("19.00"))

Upvotes: 1

Mark Ransom
Mark Ransom

Reputation: 308432

Make sure the strings you're inserting are Unicode too.

CURRENCY_SYMBOL_MAP = {"CAD":u'$', "USD":u'$', "GBP" : u"£"}

Upvotes: 3

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