How to replace items in Python Programming

Hey, hope you find this video helpful in replacing strings or int or anything else in your code to something else using the .replace function

[TigerM]

I get this error: AttributeError: 'list' object has no attribute 'replace'

[RagHelen]

Nice. I was looking for a way to transform the tags of an XML-File and I'll give this a try.

[dylanmaulucci]

Why won't this work here:
vowels = ['a', 'e', 'i', 'o', 'u']
bullChar = ['*', '*', '*', '*', '*']
sentence = 'After 1500 years of that thinking surpresed, '
print(sentence)
sentence.lower()
x=list(sentence)
def vowel_replace(vowels, bullChar, x):
for i in range(len(bullChar)):
x=x.replace(vowels[i], bullChar[i])
return x

x = ''.join(x)
x