python：SyntaxError：扫描字符串文字时EOL

Question

I have the above-mentioned error in s1="some very long string............"

Does anyone know what I am doing wrong?

Answer 1

You are not putting a " before the end of the line.

Use """ if you want to do this:

""" a very long string ...... 
....that can span multiple lines
"""

Answer 2

I had this problem - I eventually worked out that the reason was that I'd included \\ characters in the string. If you have any of these, "escape" them with \\\\ and it should work fine.

Answer 3

(Assuming you don't have/want line breaks in your string...)

How long is this string really?

I suspect there is a limit to how long a line read from a file or from the commandline can be, and because the end of the line gets choped off the parser sees something like s1="some very long string.......... (without an ending " ) and thus throws a parsing error?

You can split long lines up in multiple lines by escaping linebreaks in your source like this:

s1="some very long string.....\
...\
...."

Answer 4

In my situation, I had \\r\\n in my single-quoted dictionary strings. I replaced all instances of \\r with \\\\r and \\n with \\\\n and it fixed my issue, properly returning escaped line breaks in the eval'ed dict.

ast.literal_eval(my_str.replace('\r','\\r').replace('\n','\\n'))
  .....

Answer 5

I faced a similar problem. I had a string which contained path to a folder in Windows eg C:\\Users\\ The problem is that \\ is an escape character and so in order to use it in strings you need to add one more \\ .

Incorrect: C:\\Users\\

Correct: C:\\\\\\Users\\\\\\

Answer 6

你可以试试这个：

s = r'long\annoying\path'

Answer 7

我也有这个问题，虽然这里有答案，但我想在此之后强调一个重要的点/不应该有空格。注意它

Answer 8

I also had this exact error message, for me the problem was fixed by adding an " \\"

It turns out that my long string, broken into about eight lines with " \\" at the very end, was missing a " \\" on one line.

Python IDLE didn't specify a line number that this error was on, but it red-highlighted a totally correct variable assignment statement, throwing me off. The actual misshapen string statement (multiple lines long with " \\") was adjacent to the statement being highlighted. Maybe this will help someone else.

Answer 9

In my case, I use Windows so I have to use double quotes instead of single.

C:\Users\Dr. Printer>python -mtimeit -s"a = 0"
100000000 loops, best of 3: 0.011 usec per loop

Answer 10

In my case with Mac OS X, I had the following statement:

model.export_srcpkg(platform, toolchain, 'mymodel_pkg.zip', 'mymodel.dylib’)

I was getting the error:

  File "<stdin>", line 1
model.export_srcpkg(platform, toolchain, 'mymodel_pkg.zip', 'mymodel.dylib’)
                                                                             ^
SyntaxError: EOL while scanning string literal

After I change to:

model.export_srcpkg(platform, toolchain, "mymodel_pkg.zip", "mymodel.dylib")

It worked...

David

Answer 11

I was getting this error in postgresql function. I had a long SQL which I broke into multiple lines with \\ for better readability. However, that was the problem. I removed all and made them in one line to fix the issue. I was using pgadmin III.

Answer 12

就我而言，我忘记了字符串末尾的(' 或 ") 。例如 'ABC'或"ABC"

Answer 13

Your variable(s1) spans multiple lines. In order to do this (ie you want your string to span multiple lines), you have to use triple quotes(""").

s1="""some very long 
string............"""

Answer 14

In this case, three single quotations or three double quotations both will work! For example:

    """Parameters:
    ...Type something.....
    .....finishing statement"""

OR

    '''Parameters:
    ...Type something.....
    .....finishing statement'''

Answer 15

I had faced the same problem while accessing any hard drive directory. Then I solved it in this way.

 import os
 os.startfile("D:\folder_name\file_name") #running shortcut
 os.startfile("F:") #accessing directory

The picture above shows an error and resolved output.

Answer 16

以前的大多数答案都是正确的，我的答案与 aaronasterling 非常相似，您也可以做 3 个单引号 s1='''some very long string .........'''

Answer 17

All code below was tested with Python 3.8.3

---

Simplest -- just use triple quotes.
Either single:

long_string = '''some
very 
long
string
............'''

or double:

long_string = """some
very 
long
string
............"""

Note: triple quoted strings retain indentation, it means that

long_string = """some
    very 
    long
string
............"""

and

long_string = """some
    very 
long
string
............"""

or even just

long_string = """
some
very 
long
string
............"""

are not the same .
There is a textwrap.dedent function in standard library to deal with this, though working with it is out of question's scope.

---

You can, as well, use \\n inside a string, residing on single line:

long_string = "some \nvery \nlong \nstring \n............"

---

Also, if you don't need any linefeeds (ie newlines) in your string, you can use \\ inside regular string:

long_string = "some \
very \
long \
string \
............"