import re

#Line feed code
EOL = '\n'
#ASCII pattern
p_ac = '[!-~\\s]'
#Japanese(Non-ASCII)pattern
p_jp = '([^!-~\\s]|[　])'

#1-line comment pattern
p_com = '//'
# p_com = '#'

#whole pattern
pattern = f'[ ]*{p_com}({p_ac}*{p_jp}+)+{p_ac}*$'

#The string you want to replace
s = '''1 aaa
2 bbb //Ai i u u e o o
3  //ka or ki ki ku ke ke ko ko
4    //Good
5 // uuu
6 print (aaa)   //Show aaa
7 print (ccc)   // print ccc
8
[EOD]'''

#Before replacement
print (s)
print ('----------------------')

n = ''
#Split line by line
ary = s.split(EOL)

#Replacement process
for l in ary:
    #Delete target
    r = re.sub(pattern, '', l)
    n += r + EOL

#After replacement
print (n)

1 aaa
2 bbb //Ai i u u e o o
3  //ka or ki ki ku ke ke ko ko
4    //Good
5 // uuu
6 print (aaa)   //Show aaa
7 print (ccc)   // print ccc
8
[EOD]
----------------------
1 aaa
2 bbb
3
4
5 // uuu
6 print (aaa)
7 print (ccc)   // print ccc
8
[EOD]

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