Bad operand type for unary +: 'str'

Publish date: 2024-05-08

I cannot figure out a problem I am having with code written in Python 2.7. I am converting the references to ints, but I keep getting a type exception bad operand type for unary +: 'str'. Can anyone assist?

import urllib2 import time import datetime stocksToPull = 'EBAY', 'AAPL' def pullData(stock): try: print 'Currently pulling', stock print str(datetime.datetime.fromtimestamp(time.time()).strftime('%Y-%m-%d %H:%M:%S')) urlToVisit = 'http://chartapi.finance.yahoo.com/instrument/1.0/' + \ stock + '/chartdata;type=quote;range=3y/csv' saveFileLine = stock + '.txt' try: readExistingData = open(saveFileLine, 'r').read() splitExisting = readExistingData.split('\n') mostRecentLine = splitExisting[-2] lastUnix = mostRecentLine.split(',')[0] except Exception, e: print str(e) time.sleep(1) lastUnix = 0 saveFile = open(saveFileLine, 'a') sourceCode = urllib2.urlopen(urlToVisit).read() splitSource = sourceCode.split('\n') for eachLine in splitSource: if 'values' not in eachLine: splitLine = eachLine.split(',') if len(splitLine) == 6: if int(splitLine[0]) > int(lastUnix): lineToWrite = eachLine + '\n' saveFile.write(lineToWrite) saveFile.close() print 'Pulled', + stock print 'Sleeping....' print str(datetime.datetime.fromtimestamp(time.time()).strftime('%Y-%m-%d %H:%M:%S')) time.sleep(120) except Exception, e: print 'main loop', str(e) for eachStock in stocksToPull: pullData(eachStock) 

I am hitting the operand exception bad operand type for unary +: 'str' when it gets to if int(splitLine[0]) > int(lastUnix): even though both values being compared print out as ints when tested. can anyone give me some feedback? thank you!

here is the exception response:

Currently pulling EBAY 2013-12-21 11:32:40 Pulled main loop bad operand type for unary +: 'str' Currently pulling AAPL 2013-12-21 11:32:41 Pulled main loop bad operand type for unary +: 'str'` 
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2 Answers

You say that if int(splitLine[0]) > int(lastUnix): is causing the trouble, but you don't actually show anything which suggests that. I think this line is the problem instead:

print 'Pulled', + stock 

Do you see why this line could cause that error message? You want either

>>> stock = "AAAA" >>> print 'Pulled', stock Pulled AAAA 

or

>>> print 'Pulled ' + stock Pulled AAAA 

not

>>> print 'Pulled', + stock PulledTraceback (most recent call last): File "<ipython-input-5-7c26bb268609>", line 1, in <module> print 'Pulled', + stock TypeError: bad operand type for unary +: 'str' 

You're asking Python to apply the + symbol to a string like +23 makes a positive 23, and she's objecting.

2

The code works for me. (after adding missing except clause / import statements)

Did you put \ in the original code?

urlToVisit = 'http://chartapi.finance.yahoo.com/instrument/1.0/' \ + stock + '/chartdata;type=quote;range=5d/csv' 

If you omit it, it could be a cause of the exception:

>>> stock = 'GOOG' >>> urlToVisit = 'http://chartapi.finance.yahoo.com/instrument/1.0/' >>> + stock + '/chartdata;type=quote;range=5d/csv' Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: bad operand type for unary +: 'str' 

BTW, string(e) should be str(e).

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