8

So I have this as part of a mail sending script:

try:
    content = ("""From: Fromname <fromemail>
    To: Toname <toemail>
    MIME-Version: 1.0
    Content-type: text/html
    Subject: test

    This is an e-mail message to be sent in HTML format

    <b>This is HTML message.</b>
    <h1>This is headline.</h1>
    """)

...

    mail.sendmail('from', 'to', content)

And I'd like to use different subjects each time (let's say it's the function argument).

I know there are several ways to do this.

However, I am also using ProbLog for some of my other scripts (a probabilistic programming language based in Prolog syntax). As far as I know, the only way to use ProbLog in Python is through strings, and if the string is broke in several parts; example = ("""string""", variable, """string2"""), as well as in the email example above, there's no way I can make it work.

I actually have a few more scripts where using variables in multiline strings could be useful, but you get the idea.

Is there any way to make this work? Thanks in advance!

Improve this question
5
  • 2
    I'm confused what you're trying to do. Commented Mar 9, 2016 at 21:31
  • 3
    You appear to want a multi-line String, not a multi-line comment. Using a variable in a comment wouldn't make any sense - comments aren't executed. Commented Mar 9, 2016 at 21:33
  • Python doesn't have multi-line comments. Triple-quoted strings are not comments. Commented Mar 9, 2016 at 21:47
  • That's right. Sorry. Multiline strings. I'm new into python. I just didn't thought about it. Commented Mar 9, 2016 at 21:48
  • This question was incorrectly marked as a duplicate of stackoverflow.com/questions/517355 ... this question is not a duplicate because the other question does not refer to using multi-line strings Commented Mar 9, 2016 at 22:13

1 Answer 1

Reset to default
16

Using the .format method:

content = """From: Fromname <fromemail>
    To: {toname} <{toemail}>
    MIME-Version: 1.0
    Content-type: text/html
    Subject: {subject}

    This is an e-mail message to be sent in HTML format

    <b>This is HTML message.</b>
    <h1>This is headline.</h1>
"""
mail.sendmail('from', 'to', content.format(toname="Peter", toemail="p@tr", subject="Hi"))

Once that last line gets too long, you can instead create a dictionary and unpack it:

peter_mail = {
    "toname": "Peter",
    "toemail": "p@tr",
    "subject": "Hi",
}
mail.sendmail('from', 'to', content.format(**peter_mail))

As of Python 3.6, you can also use multi-line f-strings:

toname = "Peter"
toemail = "p@tr"
subject = "Hi"
content = f"""From: Fromname <fromemail>
    To: {toname} <{toemail}>
    MIME-Version: 1.0
    Content-type: text/html
    Subject: {subject}

    This is an e-mail message to be sent in HTML format

    <b>This is HTML message.</b>
    <h1>This is headline.</h1>
"""
Improve this answer
Sign up to request clarification or add additional context in comments.

Comments

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.