Why is the code not working?

Question

message = 'd89%l++5r19o7W *o=l645le9H'
message = message.replace(' ', '')
unwanted_characters = """-':";,?)(*&^%$#@!+×÷=/_€£¥₩1234567890`~\|<>}{]["""
for c in message:
if c in unwanted_characters:
message = message.replace(unwanted_characters, '')
print(message)

Answer 1

Guilherme Cardoso

message = 'd89%l++5r19o7W *o=l645le9H'

# do not remove the empty space

# escape the ' \ '. change '\' to ' \\'
unwanted_characters = """-':";,?)(*&^%$#@!+×÷=/_€£¥₩1234567890`~\\|<>}{]["""

for c in message:
if c in unwanted_characters:
# use (c,''), not (message,'')
message = message.replace(c, '')
# reverse the message
message = message[::-1]
print(message)

Answer 2

Another way to handle escape character.

txt = r'\n' # raw string
print(len(txt)) # 2

for t in txt:
print(t)

# \
# n

Answer 3

Wong Hei Ming
nice. I always forget about raw strings.
but you still have to escape " or ', depending on which one you use as enclosure.

unwanted_characters = r"-':\";,?)(*&^%$#@!+×÷=/_€£¥₩1234567890`~\|<>}{]["

or

unwanted_characters = r'-\':";,?)(*&^%$#@!+×÷=/_€£¥₩1234567890`~\|<>}{]['