删除字符串中以某些字符开头的行

Question

I am trying to remove all lines in a string that start with some characters. I tried the block of code below but it was not working. My code should only print "Any thanks " as the result, but it outputs the entire original text.

text = """Any thanks \n first_************ \n last_************ has \n"""

from io import StringIO
s = StringIO(text)
for line in (s):
    if not line.startswith(' first_') \
        or not line.startswith(' last_'):
        print(line)

Answer 1

Every string will fullify that or as those two conditions are mutually exclusive - compose your condition with and :

if not line.startswith(' first_') \
    and not line.startswith(' last_'):

Answer 2

Your or statement is always returning True . For example if the line starts with ' first_' then not line.startswith(' first_') returns False and not line.startswith(' last_') returns True so. False or True evaluates to True .

There are a couple ways you could write this, but the most straightforward would be to rewrite the if statement:

for line in (s):
    if not (line.startswith(' first_') or line.startswith(' last_')):
        print(line)