Reading file line by line from #1comment till #2nd comment

i want to read, parse a .txt file and save it in a variables. After first comment #a till end of #~~ to variable a then for var b: to read after comment #b till comment #~~ and so on.

#a
  60   8   10
  12  30   12
#~~
#b  
14 2
30 12
#~~
#c
 40 14

with open("file.txt") as f:
    for line in f:
         li = line.strip()
         if li.startswith("#a"):

Solution

I might just read the entire file into Python, and then use re.findall to find all comments:

inp = """#a
  60   8   10
  12  30   12
#~~
#b  
14 2
30 12
#~~
#c
 40 14
#~~"""

matches = re.findall('#(\\w+)\s+(.*?)#~~\s*', inp, flags=re.DOTALL)
print(matches)

This prints:

[('a', '60   8   10\n  12  30   12\n'), ('b', '14 2\n30 12\n'), ('c', '40 14\n')]

In place of the hard-coded data I have above, use the following to read from your actual file:

file = open("file.txt")
inp = file.read()
file.close()

Edit:

If you only want to retain the comment data itself, but not the labels, then reduce the 2D list to a 1D list via a comprehension:

matches = re.findall('#(\\w+)\s+(.*?)#~~\s*', inp, flags=re.DOTALL)
output = [j for (i, j) in matches]
print(output)

This prints:

['60   8   10\n  12  30   12\n', '14 2\n30 12\n', '40 14\n']