Python 3.x：sys.stdin.readlines（）上的''.join（）输入在最终字符不是换行/换行符时不返回最终字符串

Question

I'd like to convert a chunk of text, be it a single line or multiple lines, into a single string with one remaining white space " " at the end.

This is my code:

# Take a block of text as input.
print("Input Your Sentence(s) Below (and Then Hit CTRL+D):")
samp_sent = sys.stdin.readlines()

samp_sent = ' '.join(samp_sent)
samp_sent = samp_sent.replace("\n", " ")
print(samp_sent)

If the final character is not a line break, it omits the string and just adds the " " .

Examples (Input → Output)：

1. "Here is one line. \\n Here is another line. \\n" → "Here is one line. Here is another line. "

2. "Here is one line. \\n Here is another line." → "Here is one line. "

3. "Here is one line." → " "

No matter if I type examples (1), (2), or (3) as input, how can I make sure that the final line will always appear in print(samp_sent) ?

Answer 1

If do not need white space at the beginning or end of a line, you can do:

samp_sent = ' '.join(line.strip() for line in samp_sent)

instead of

samp_sent = ' '.join(samp_sent)
samp_sent = samp_sent.replace("\n", " ")

another alternative:

print("Input Your Sentence(s) Below (and Then Hit CTRL+D):")
samp_sent = ' '.join(sys.stdin.read().splitlines())
print(samp_sent)