Codehs Python, Remove All from String
I Am Using Codehs for My Computer Science Principles Class and One of the Problems in the Strings Section Is Really Confusing Me. We Have to Remove All of One...
I am using CodeHS for my Computer Science Principles class and one of the problems in the Strings section is really confusing me. We have to remove all of one string from another string.
These are the official instructions:
Write a function called remove_all_from_string that takes two strings, and returns a copy of the first string with all instances of the second string removed. You can assume that the second string is only one letter, like "a".
We are required use:
- A function definition with parameters
- A while loop
- The find method
- Slicing and the + operator
- A return statement
We are expected to only have to use those 5 things to make it work. I attempted to write this program but my function doesn't do anything and I am really stumped.
def remove_all_from_string(word, letter):
while letter in word:
x=word.find(letter)
if x==-1:
continue
else:
return x
print word[:x] + word[x+1:]
remove_all_from_string("alabama", "a")
5 Answers
def remove_all_from_string(word, letter):
while letter in word:
x=word.find(letter)
if x == -1:
continue
else:
word = word[:x] + word[x+1:]
return word
print(remove_all_from_string("hello", "l"))
The easiest way to do this would obviously just be
def remove_all_from_string(word, letter):
return word.replace(letter, "")
However, considering the parameters, another way we could do this is like so:
def remove_all_from_string(word, letter):
while letter in word:
x=word.find(letter)
if x == -1:
continue
else:
word = word[:x] + word[x+1:]
return word
You could run this and print it by typing
>>> print(remove_all_from_string("Word Here", "e"))
#returns Word hr
def remove_all_from_string(word, letter):
letters = len(word)
while letters >= 0:
x=word.find(letter)
if x == -1:
letters = letters - 1
continue
else:
# Found a match
word = word[:x] + word[x+1:]
letters = letters - 1
return word
remove_all_from_string("alabama", "a")
def remove_all_from_string(word, letter):
while letter in word:
num = word.find(letter)
word = word[:num] + word[num+1:]
return word
I have this so far and it keeps saying that message is not defined and when I define it with find_secret_word it says "find_secret_word" is not defined, what do I do? This is my code:
word = "bananas"
letter = "na"
index = word.find(letter)
def remove_all_from_string(word, letter):
while letter in word:
x=word.find(letter)
if x == -1:
continue
else:
word = word[:x] + word[x+1:]
return word
word = word[:index] + word[index+len(letter):]
print(remove_all_from_string("hello", "l"))
def find_secret_word(message):
while True:
return hidden_word
hidden_word = "iCjnyAyT"
for letter in message:
if letter.upper():
hidden_word = hidden_word + letter
print (find_secret_word(message))
Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.
