On 2017-09-02 18:53, Charles Hixson wrote:
python3 --version
Python 3.5.3
Running on Debian stretch
In this code s is a string parameter
while (j < k and \
(s[j].isalnum()) or \
(s[j] in seps and s[j+1].isalnum()) ):
j = j + 1
print ("i = {0}, j = {1}, k = {2}, len[s] = {3}". \
format(i, j, k, len(s) ) )
Yields the result:
i = 25, j = 27, k = 31, len[s] = 32
i = 25, j = 28, k = 31, len[s] = 32
i = 25, j = 29, k = 31, len[s] = 32
i = 25, j = 30, k = 31, len[s] = 32
i = 25, j = 31, k = 31, len[s] = 32
Traceback (most recent call last):
File "parse1.py", line 40, in <module>
print (parse1("The gostack distimms the doshes."))
File "parse1.py", line 21, in parse1
(s[j] in seps and s[j+1].isalnum()) ):
IndexError: string index out of range
I hesitate to report this, because I've been wrong so often, but it
looks to me like the last iteration should not have happened since j is
not less than k.
The last iteration happened because j < k when you tested the while
loop's condition.
You then added 1 to j before printing out j and k. At this print, j >= k.
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