Dhvani Shah - 1 month ago 5
Python Question

# to convert a MCQ in the required format - python

I am trying to convert MCQ which is as follows:

``````Which will legally declare, construct, and initialize an array?
A. int [] myList = {"1", "2", "3"};
B. int [] myList = (5, 8, 2);
C. int myList [] [] = {4,9,7,0};
D. int myList [] = {4, 3, 7};
``````

into the required format which is as mentioned below:

``````Which will legally declare, construct, and initialize an array?
int [] myList = {"1", "2", "3"};
int [] myList = (5, 8, 2);
int myList [] [] = {4,9,7,0};
*int myList [] = {4, 3, 7};
``````

The logic I'm trying is as follows:

``````1. Open the text file and trying to fetch the line number of "ANSWER: D"
2. Open the file again and go to that line number
3. write a for loop which will iterate max 5 times till it find the match
"D." is found.
4.Once the match is found replace it with '*'
``````

Below is the code I tried:

``````import re

ans = []
line_no = []

class Options:
def __init__(self, ans1, num1):
self.a = ans1
self.n = num1
#print(self.a, self.n)

pattern = 'ANSWER: [A-Z]' # to fetch the answer of each question
r = re.compile(pattern)

pattern1 = '[A-F]\.\s'
re1 = re.compile(pattern1)

with open (r"C:\Users\dhvani\Desktop\test.txt", "r") as f:
for num, line in enumerate(f, 1):
d = r.findall(line)
if(d):
l = d[0].split(":")
m = l[1].split(" ")
m = m[1] + "."
ans.append(m)
line_no.append(num)

x = Options(ans, line_no)
print(x.a, x.n)

with open (r"C:\Users\dhvani\Desktop\test.txt", "r") as f:
for i, j in enumerate(ans):
j1 = j[0]
print(z)
for n in range(j1 - 1, j1 - 7, -1):
value1 = re1.findall(value)

if value1:
if value1 == i:
value.sub('[A-F]\.\s', '*', value)
break;
``````

I am able to fetch the line number of "ANSWER: D" and store 'D.' and its corresponding line number in two different lists.

Then later steps are unsuccessful.

Any help will be greatly appreciated.
I am new to Python.

You could use the following code:

``````import re

with open("your_filename_here", "r") as fp:

rx = re.compile(r'''
(?!^[A-E]\.)
(?P<question>.+[\n\r])
(?P<choices>[\s\S]+?)
''', re.MULTILINE | re.VERBOSE)

rq = re.compile(r'^[A-E]\.\ (?P<choice>.+)')

for match in rx.finditer(string):

line = rq.sub(r"*\1", line)
else:
line = rq.sub(r"\1", line)
return line