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I have this:

    rotValues = '[rx='+ rotx + ',' + "ry=" + roty +"]"

It gives me the error shown in the title, help please!

  • You should take a look at string interpolation or string formatting. Both will make it easy to print floats with a certain precision – JBernardo Mar 27 '14 at 01:06

3 Answers3

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Another (and much better way) of doing this is to use the str.format method:

>>> rotx, roty = 5.12, 6.76
>>> print '[rx={},ry={}]'.format(rotx, roty)
[rx=5.12,ry=6.76]

You can also specify the precision using format:

>>> print '[rx={0:.1f},ry={1:.2f}]'.format(rotx, roty)
[rx=5.1,ry=6.76]
Steinar Lima
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You are getting this error because you are trying to concatenate a string with floats. Python, being a strongly typed language will not allow that. Therefore, you have to convert the rotx and roty values to strings as follows:

rotValues = '[rx='+ str(rotx) + ',' + "ry=" + str(roty) +"]"

If you want your values (rotx and roty) to have a certain precision in decimal points, you can do:

rotValues = '[rx='+ str(round(rotx,3)) + ',' + "ry=" + str(round(roty,3)) +"]"

>>> rotx = 1234.35479334
>>> str(round(rotx, 5))
'1234.35479'
sshashank124
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Simply try this:

>>> rotValues = '[rx='+ str(rotx) + ',' + "ry=" + str(roty) +"]" 
>>> print rotValues
[rx=1.0,ry=2.0]
Sharif Mamun
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