About Python MCQ

Question

import re
str = 'sololearn123'
print(re.sub(r'[aA-zZ]',",str))

How the output is 123?

Answer 1

Mustakim Rahman

the code as it is given is not completely correct:

print(re.sub(r'[aA-zZ]',",str))
^
the marked character is 1 double quote >"<, but should be 2 single quotes >''< since it represents an empty string.

the character group [aA-zZ] is working, but could be written also like: [a-zA-Z].

Answer 2

Sandeep ,

i copied the code and pasted it in my local editor, where i could see a difference between 2 single quotes and 1 double quote.

Answer 3

Sandeep ,

i am using pydroid on my android device. the font i am using is listed as *Monospace*

Answer 4

thanks Lothar 👍
I guess font choice really matters in programming

Answer 5

Lothar how did you find it's a double quote? It looks exactly similar to two single quotes!

Answer 6

Lothar which code editor do you use?

Answer 7

re.sub() function replaces one or many matches with a string in the given text. The search and replacement happens from left to right.

Answer 8

Lothar
good catch😎!
Python error message was useless for this one...🙃
Perhaps font choice makes it easier or harder to spot.
like l or 1,0,O,',` etc...