The code:
def split_string(source,splitlist):
idx = 0
while idx < len(splitlist):
if splitlist[idx] in source:
source = ' '.join(source.split(splitlist[idx]))
idx += 1
source = source.split(' ')
print "source is", source, "and its type is", type(source) # <--
while "'' in
source: # <--
source = source.remove('')
return source
out = split_string('Hi! I am your Assistant Instructor, Peter.', '! ,.')
print out
The result:
source is ['Hi', '', 'I', 'am', 'your', 'Assistant', 'Instructor', '',
'Peter', ''] and its type is <type 'list'>
Traceback (most recent call last):
File "/tmp/pytmp.py", line 18, in <module>
out = split_string('Hi! I am your Assistant Instructor, Peter.', '! ,.')
File "/tmp/pytmp.py", line 13, in split_string
while '' in source:
TypeError: argument of type 'NoneType' is not iterable
Between the two arrows, 'source' inexplicably switches from <type list>
to <type NoneType>. Why?
Ray
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