[Solved] The Spy Life (Don't use parenthesis inside character class.)

Question

I tried to solved "The Spy Life" challenge by the following code and it worked well for test cases 1,2,4,5 but it fails in test case 3 which is hidden for me and I can see whats the problem to resolve it.

Can anyone please see whats the problem of this code and how to fix it?

The task is to take a string from input, invert it and remove any character that is not a letter or space and output the decoded message.

My code:

import re
msg = input()[::-1]
pattern = r"[^(a-zA-Z\s)]+"
decoded_msg = re.sub(pattern,"",msg)
print(decoded_msg)

Example Input:
t`a=e+r8g 9e78r3a4 u^o%y*

Output:
you are great

Answer 1

#1 way
txt = input()
t2 = ''.join(i for i in txt if i.isalpha() or i==' ')
print(t2[::-1])

#2 way
txt = input()
t2 = ''
for i in txt:
if i.isalpha() or i==' ':
t2+=i
print(t2[::-1])

Answer 2

# I think it will be useful…
https://code.sololearn.com/ch0dAa1vT5te/?ref=app

Answer 3

If the use of RegEx is optional, you could try validating each character instead, like:

msg = input()[::-1]
decoded_msg = “”.join([c for c in msg if c.isalpha() or c.isspace()])
print(decoded_msg)

This will use a list comprehension to create a list of characters that are a letter or a space, then join the list to create the output string.

Hopefully, this will fix the hidden test case.

Answer 4

Brian Alexis
Your code raises "SyntaxError"

Answer 5

Siavash Kardar Tehran Try rewriting the double quotes in line 2 (“”.join()) yourself, it seems to be a SoloLearn or my keyboard formatting issue. It worked for me after rewriting.