A=s.append(s[i]+A+B)
A=s.append(s[i]+A+B) TypeError: unsupported operand type(s) for +: 'long' and 'str'
What does this error mean ? A and B are strings and s is a list
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1Clearly related to your earlier stackoverflow.com/questions/2612461/… Consider editing the original instead.Philippe Beaudoin– Philippe Beaudoin2010-04-10 06:57:50 +00:00Commented Apr 10, 2010 at 6:57
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3 Answers
s may be a list, but the element - s[i] - is not - it's a long, as indicated by the error.
In addition, append() operates on the list directly - it returns None, so you're actually setting A to be None - probably not what you wanted!
There are two things you can do to help avoid this type of error in the future.
Don't use one-letter variable names. Use descriptive, one to three-word length names that describe what the variable has in it (and/or what it's supposed to be used for).
When you do have a problem, try putting it in a try/except block where you put the error name after
exceptand print out the offending variables:
try:
s.append(s[i]+A+B)
except TypeError:
print "Failed to add", s[i], ",", A, ",", "and", B
raise
Don't forget the raise at the end there - that way you don't just ignore the issue and start getting really strange errors.
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If A and B are strings, then s[i] must be a 'long'.
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s[i] is likely a long. You can't add a long to a string.
Try:
A=s.append(str(s[i])+A+B)
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