On 2024-05-29 05:33, Kevin M. Wilson via Python-list wrote:
The following is my effort to understand how to process a string, letter, by
letter:
def myfunc(name): index = 0 howmax = len(name) # while (index <=
howmax): while (index < howmax): if (index % 2 == 0):
print('letter to upper = {}, index {}!'.format(name[index], index)) name =
name[index].upper() print('if block {} and index {}'.format(name[index],
index)) elif (index % 2 > 0): print(index) print('Start:
elseif block, index is {}, letter is {}'.format(index, name)) # print('letter
to lower = {}'.format(name[index])) # print('Already lowercase do noting:
name = {}'.format(name[index])) index += 1 # index = name.upper()
return name
myfunc('capitalism')
Error message: Not making sense, index is 1, letter s/b
'a'letter to upper = c, index 0!
if block C and index 0
1
Start: elseif block, index is 1, letter is C
---------------------------------------------------------------------------
IndexError Traceback (most recent call last)
Cell In[27], line 21
17 # index = name.upper()
19 return name
---> 21 myfunc('capitalism')
Cell In[27], line 8, in myfunc(name)
6 while (index < howmax):
7 if (index % 2 == 0):
----> 8 print('letter to upper = {}, index {}!'.format(name[index],
index))
9 name = name[index].upper()
10 print('if block {} and index {}'.format(name[index], index))
IndexError: string index out of
range***************************************************
So, I'm doing something... Stupid!!
***************************************************
"When you pass through the waters, I will be with you: and when you pass through the
rivers, they will not sweep over you. When you walk through the fire, you will not be
burned: the flames will not set you ablaze."
Isaiah 43:2
I think the code is this:
def myfunc(name):
index = 0
howmax = len(name)
# while (index <= howmax):
while (index < howmax):
if (index % 2 == 0):
print('letter to upper = {}, index {}!'.format(name[index],
index))
name = name[index].upper()
print('if block {} and index {}'.format(name[index], index))
elif (index % 2 > 0):
print(index)
print('Start: elseif block, index is {}, letter is
{}'.format(index, name))
# print('letter to lower = {}'.format(name[index]))
# print('Already lowercase do noting: name =
{}'.format(name[index]))
index += 1
# index = name.upper()
return name
myfunc('capitalism')
What is:
name = name[index].upper()
meant to be doing?
What it's _actually_ doing is getting the character at a given index,
converting it to uppercase, and then assigning it to `name`, so `name`
is now 1 character long.
It doesn't this when 'index' is 0, so after the first iteration, `name`
is a single-character string.
On the second iteration it raises IndexError because the string is only
1 character long and you're asking for `name[1]`.
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