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+--- Thread: no vowels function (/thread-7264.html)
no vowels function - alex_bgtv - Jan-01-2018
Hi,
using codecademy for Python learning.
In one of the exercises, were asked to write a function deleting all vowels from a string (upper and lower).
Tried the following, didn't work. Do I misinterpret the replace function?
def anti_vowel (text):
new = text.lower()
for l in new:
if l=="a" or l=="u" or l=="e" or l=="i" or l=="o":
text.replace(l,"")
return text
RE: no vowels function - Mekire - Jan-01-2018
replace does not work inplace (strings are immutable).You want this:
text = text.replace(l,"")This is, however, not an efficient way to solve this problem (computationally). You would be better to build a list and
join it at the end.Also your conditional is better written:
if l in "aeiou":
RE: no vowels function - squenson - Jan-01-2018
What about "y"?
(See a good explanation here)
RE: no vowels function - alex_bgtv - Jan-01-2018
hhh, they asked without "Y"
Mekire - how about the following example
https://www.tutorialspoint.com/python/string_replace.htm
quote from the link:
The following example shows the usage of replace() method.
#!/usr/bin/python
str = "this is string example....wow!!! this is really string"
print str.replace("is", "was")
print str.replace("is", "was", 3)
When we run above program, it produces following result −
thwas was string example....wow!!! thwas was really string
thwas was string example....wow!!! thwas is really string
RE: no vowels function - squenson - Jan-01-2018
The example is correct but Mekari's point is that the initial string str is unchanged. Add after the two print statements:
print str
RE: no vowels function - snippsat - Jan-01-2018
The point is that replace can only replace 1 word(as your example) or 1 character.
So if word is
apple can't write replace('ae', '')Have to call replace two times.
>>> text = 'apple'
>>> a = text.replace('a', '')
>>> a
'pple'
>>> b = a.replace('e', '')
>>> b
'ppl' But using replace is unnecessary and only make the task more difficult than it is.Here a hint.
>>> text = 'apple' >>> letters = [] >>> for char in text: ... if char not in 'aeiou': ... letters.append(char) ... >>> letters ['p', 'p', 'l'] >>> ''.join(letters) 'ppl'
RE: no vowels function - alex_bgtv - Jan-01-2018
Clear
thanks!