Python People,
I am learning about assertions. I wrote a small script that takes 2
inputs, an amino acid sequence and one residue symbol. The script should
return what percent of the sequence is residue in output. The point of
this script is to use assert for debugging. My script seems to work
correctly, but when I use the assert statements that are supposed to
test the script, the assertions indicate there is a problem with the
script.
>>> def aminosleft(sequence, res):
... sequp = sequence.upper()
... lens1 = len(sequp)
... rep = res.upper()
... reps2 = sequp.replace(rep,"")
... lens2 = len(reps2)
... resid = 100* (lens1 - lens2) / lens1
... print(int(resid))
...
...
>>> aminosleft("MSRSLLLRFLLFLLLLPPLP", "M")
5
>>> assert aminosleft("MSRSLLLRFLLFLLLLPPLP", "M") == 5
5
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AssertionError
>>> aminosleft("MSRSLLLRFLLFLLLLPPLP", "r")
10
>>> assert aminosleft("MSRSLLLRFLLFLLLLPPLP", "r") == 10
10
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AssertionError
>>> aminosleft("msrslllrfllfllllpplp", "L")
50
>>> assert aminosleft("msrslllrfllfllllpplp", "L") == 50
50
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AssertionError
>>> aminosleft("MSRSLLLRFLLFLLLLPPLP", "Y")
0
>>> assert aminosleft("MSRSLLLRFLLFLLLLPPLP", "Y") == 0
0
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AssertionError
The script returns an integer. I don't know if the assertion uses an
integer or if that matters. What is causing the AssertionError?
John
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