在引号中使用引号

当我想在 Python 中执行 print命令并且需要使用引号时,我不知道如何在不关闭字符串的情况下执行该命令。

例如:

print " "a word that needs quotation marks" "

但是当我尝试执行上面的操作时,我最终关闭了字符串,而且我不能将需要的单词放在引号之间。

我该怎么做?

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Python accepts both " and ' as quote marks, so you could do this as:

>>> print '"A word that needs quotation marks"'
"A word that needs quotation marks"

Alternatively, just escape the inner "s

>>> print "\"A word that needs quotation marks\""
"A word that needs quotation marks"

You need to escape it. (Using Python 3 print function):

>>> print("The boy said \"Hello!\" to the girl")
The boy said "Hello!" to the girl
>>> print('Her name\'s Jenny.')
Her name's Jenny.

See the python page for string literals.

You could do this in one of three ways:

  1. Use single and double quotes together:

    print('"A word that needs quotation marks"')
    "A word that needs quotation marks"
    
  2. Escape the double quotes within the string:

    print("\"A word that needs quotation marks\"")
    "A word that needs quotation marks"
    
  3. Use triple-quoted strings:

    print(""" "A word that needs quotation marks" """)
    "A word that needs quotation marks"
    

Use the literal escape character \

print("Here is, \"a quote\"")

The character basically means ignore the semantic context of my next charcter, and deal with it in its literal sense.

in Python 3.2.2 on Windows,

print(""""A word that needs quotation marks" """)

is ok. I think it is the enhancement of Python interpretor.

You could also try string addition: print " "+'"'+'a word that needs quotation marks'+'"'

One case which is prevalent in duplicates is the requirement to use quotes for external processes. A workaround for that is to not use a shell, which removes the requirement for one level of quoting.

os.system("""awk '/foo/ { print "bar" }' %""" % filename)

can usefully be replaced with

subprocess.call(['awk', '/foo/ { print "bar" }', filename])

(which also fixes the bug that shell metacharacters in filename would need to be escaped from the shell, which the original code failed to do; but without a shell, no need for that).

Of course, in the vast majority of cases, you don't want or need an external process at all.

with open(filename) as fh:
for line in fh:
if 'foo' in line:
print("bar")

When you have several words like this which you want to concatenate in a string, I recommend using format or f-strings which increase readability dramatically (in my opinion).

To give an example:

s = "a word that needs quotation marks"
s2 = "another word"

Now you can do

print('"{}" and "{}"'.format(s, s2))

which will print

"a word that needs quotation marks" and "another word"

As of Python 3.6 you can use:

print(f'"{s}" and "{s2}"')

yielding the same output.

I'm surprised nobody has mentioned explicit conversion flag yet

>>> print('{!r}'.format('a word that needs quotation marks'))
'a word that needs quotation marks'

The flag !r is a shorthand of the repr() built-in function1. It is used to print the object representation object.__repr__() instead of object.__str__().

There is an interesting side-effect though:

>>> print("{!r} \t {!r} \t {!r} \t {!r}".format("Buzz'", 'Buzz"', "Buzz", 'Buzz'))
"Buzz'"      'Buzz"'     'Buzz'      'Buzz'

Notice how different composition of quotation marks are handled differenty so that it fits a valid string representation of a Python object 2.


1 Correct me if anybody knows otherwise.

2 The question's original example " "word" " is not a valid representation in Python

This worked for me in IDLE Python 3.8.2

print('''"A word with quotation marks"''')

Triple single quotes seem to allow you to include your double quotes as part of the string.

Enclose in single quotes like

print '"a word that needs quotation marks"'

Or Enclose in Double quotes

print "'a word that needs quotation marks'"

Or Use backslash \ to Escape

print " \"a word that needs quotation marks\" "

In case you don't want to use escape characters and actually want to print quote without saying " or \" and so on, you can tell python to print the ASCII value of the " character. The quote character in ASCII is 34, (single quote is 39)

In python 3

print(f'{chr(34)}')

Output: "