Syntaxerror unexpected character after line continuation character как исправить

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The Python line continuation character lets you continue a line of code on a new line in your program. The line continuation character cannot be followed by any value.

If you specify a character or statement after a line continuation character, you encounter the “SyntaxError: unexpected character after line continuation character” error.

In this guide, we talk about what this error means and why it is raised. We walk through two examples of this error in action so you can learn how to use it in your code.

SyntaxError: unexpected character after line continuation character

The line continuation character lets you write a long string over multiple lines of code. This character is useful because it makes code easier to read. The line continuation character is a backslash (“”).

Whereas it can be hard to follow a really long line of code, one line of code divided across multiple lines is easier to follow.

The line continuation character is commonly used to break up code or to write a long string across multiple lines of code:

url = "https://careerkarma.com" 
      "/blog/python-syntaxerror-unexpected-character-after" 
      "line-continuation-character"

We have broken up our string into three lines. This makes it easier to read our code.

Two scenarios when this error could be raised include:

• Using a backslash instead of a forward slash as a division operator
• Adding a new line to a string without enclosing the new line character in parenthesis

We’ll talk through each of these scenarios one-by-one.

Scenario #1: Division Using a Backslash

Here, we write a program that calculates a person’s body mass index (BMI). To start, we need to ask a user to insert their height and weight into a Python program:

height = input("What is your height? ")
weight = input("What is your weight? ")

Next, we calculate the user’s BMI. The formula for calculating a BMI value is:

“Kg” is a person’s weight in kilograms. “m²” is the height of a person squared. Translated into Python, the formula to calculate a BMI looks like this:

bmi = float(weight)  (float(height) * 2)
print("Your BMI is: " + str(bmi))

We convert the values of “weight” and “height” to floating point numbers so that we can perform mathematical functions on them.

We then print a user’s BMI to the console. We convert “bmi” to a string using the str() method so that we can concatenate it to the “Your BMI is: ” message. We round the value of “bmi” to two decimal places using the round() method.

Let’s run our code:

  File "main.py", line 4
	bmi = float(weight)  (float(height) * 2)
                                        	^
SyntaxError: unexpected character after line continuation character

We’ve encountered an error. This is because we have used “” as the division operator instead of the “/” sign. We can fix our code by using the “/” division operator:

bmi = float(weight) / (float(height) * 2)
print("Your BMI is: " + str(round(bmi, 2)))

Our code returns:

What is your height? 1.70
What is your weight? 63
Your BMI is: 18.53

Our code has successfully calculated the BMI of a user.

Scenario #2: Using the New Line Character Incorrectly

Next, we write a program that writes a list of ingredients to a file. We start by defining a list of ingredients for a shortbread recipe:

ingredients = [
	"150g plain flour",
	"100g butter, chilled an cubed",
	"50g caster sugar"
]

Next, we open up a file called “shortbread_recipe.txt” to which we will write our list of ingredients:

with open("shortbread_recipe.txt", "w+") as ingredients_file:
	for i in ingredients:
		ingredients_file.write(i + n)

This code loops through every ingredient in the “ingredients” variable. Each ingredient is written to the ingredients file followed by a new line character in Python (“n”). This makes sure that each ingredient appears on a new line.

Let’s run our Python code:

  File "main.py", line 9
	ingredients_file.write(i + n)
                             	^
SyntaxError: unexpected character after line continuation character

Our code returns an error. This is because we have not enclosed our new line character in quotation marks.

While the new line character is a special character, it must be enclosed within quotation marks whenever it is used. This is because Python treats “” as a line continuation character.

To solve the error in our code, we need to enclose the newline character in double quotes:

with open("shortbread_recipe.txt", "w+") as ingredients_file:
		for i in ingredients:
			 ingredients_file.write(i + "n")

Let’s run our code. Our code returns no value to the console. A new file called “shortbread_recipe.txt” is created. Its contents are as follows:

150g plain flour
100g butter, chilled an cubed
50g caster sugar

Our code has successfully printed our list to the “shortbread_recipe.txt” file.

Conclusion

The “SyntaxError: unexpected character after line continuation character” error is raised when you add code after a line continuation character.

To solve this error, make sure that you use the correct division operator (a forward slash) if you are performing mathematical operations. If you are using any special characters that contain a backslash, like the new line character, make sure that they are enclosed within quotation marks.

Now you’re ready to fix this error in your code!

Here’s everything about the Python syntax error unexpected character after line continuation character:

This error occurs when the backslash character is used incorrectly.

So if you want to learn all about this Python error and how to solve it, then you’re in the right place.

Keep reading!

So you got SyntaxError: unexpected character after line continuation character?—don’t be afraid this article is here for your rescue and this error is easy to fix:

Syntax errors are usually the easiest to solve because they appear immediately after the program starts and you can see them without thinking about it much. It’s not like some logical rocket science error.

However, when you see the error SyntaxError: unexpected character after line continuation character for the first time, you might be confused:

What Is a Line Continuation Character in Python?

A line continuation character is just a backslash —place a backlash at the end of a line, and it is considered that the line is continued, ignoring subsequent newlines.

You can use it for explicit line joining, for example. You find more information about explicit line joining in the official documentation of Python. Another use of the backslash is to escape sequences—more about that further below.

However, here is an example of explicit line joining:

print("This is a huge line. It is very large, "
  "but it needs to be printed on the screen "
  "in one line as it is. For this, "
  "the backslash character is used.")

This is a huge line. It is very large, but I want to print it on the screen in one line as it is. For this, I use the slash character

So as you can see the output is: This is a huge line. It is very large, but it needs to be printed on the screen in one line. For this, the backslash character is used. No line breaks.

The backslash acts like glue and connects the strings to one string even when they are on different lines of code.

When to Use a Line Continuation Character in Python?

You can break lines of code with the backslash for the convenience of code readability and maintainability:

The PEP 8 specify a maximum line length of 79 characters—PEP is short for Python Enhancement Proposal and is a document that provides guidelines and best practices on how to write Python code.

However, you don’t need the backslash when the string is in parentheses. Then you can just do line breaks without an line continuation character at all. Therefore, in the example above, you didn’t need to use the backslash character, as the entire string is in parentheses ( … ).

However, in any other case you need the backslash to do a line break. For example (the example is directly from the official Python documentation):

with open('/path/to/some/file/you/want/to/read') as file_1, 
  open('/path/to/some/file/being/written', 'w') as file_2:

file_2.write(file_1.read())

---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-1-68f8b9fb51ba> in <module>()
----> 1 with open('/path/to/some/file/you/want/to/read') as file_1,      open('/path/to/some/file/being/written', 'w') as file_2:
      2     file_2.write(file_1.read())

FileNotFoundError: [Errno 2] No such file or directory: '/path/to/some/file/you/want/to/read'

Why all that talking about this backslash? Here is why:

The error SyntaxError: unexpected character after line continuation character occurs when the backslash character is incorrectly used. The backslash is the line continuation character mentioned in the error!

Examples of “SyntaxError: Unexpected Character After Line Continuation Character” in Python

Here are examples of the character after-line continuation character error:

Example #1

The error occurs when you add an end-of-line character or line continuation character as a list item: 

)lst = [1, 2, 3]
lst.append(n)
lst

  File "<ipython-input-3-d34db7a971ff>", line 2
    lst.append(n)
                  ^
SyntaxError: unexpected character after line continuation character

Easy to fix—just put the backslash in quotes:

lst = [1, 2, 3]
lst.append("n")
lst

[1, 2, 3, 'n']

Example #2

You want to do a line break after printing something on the screen:

st = "python"
print(st, n)

  File "<ipython-input-31-8b8b9a0ca1c2>", line 2
    print(st, n)
                 ^
SyntaxError: unexpected character after line continuation character

Easy to fix, again—the backslash goes in to quotes:

st = "python"
print(st, "n")

python

Perhaps you want to add a new line when printing a string on the screen, like this. 

Example #3

Mistaking the slash / for the backslash —the slash character is used as a division operator:

print(164)

  File "<ipython-input-7-736f22f93e09>", line 1
    print(164)
               ^
SyntaxError: unexpected character after line continuation character

Another easy syntax error fix—just replace the backslash with the slash /:

print(16/4)

4.0

Example #5

However, when a string is rather large, then it’s not always that easy to find the error on the first glance.

Here is an example from Stack Overflow:

length = 10
print("Length between sides: " + str((length * length) * 2.6) + "  1.5 = " + str(((length * length) * 2.6)  1.5) + " Units")

  File "<ipython-input-11-7ea3023b0bea>", line 2
    print("Length between sides: " + str((length*length)*2.6) + "  1.5 = " + str(((length*length)*2.6)1.5)+ " Units")
                                                                                                                       ^
SyntaxError: unexpected character after line continuation character

The line of code contains several backslashes —so you need to take a closer look.

Split the line of code into logical units and put each unit on separate line of code. This simplifies the debugging:

st = "Length between sides: "
st += str((length * length) * 2.6)
st += "  1.5 = "
x = ((length * length) * 2.6)  1.5
st += str(x)
st += " Units"
print(st)

  File "<ipython-input-14-6e37321ec16d>", line 4
    x = ((length*length)*2.6)1.5
                                 ^
SyntaxError: unexpected character after line continuation character

Now you can easily see where the backslash is missing—with a sharp look at the code itself or through the debugger output. A backslash misses after the 1.5 in line of code #4.

So let’s fix this:

st = "Length between sides: "
st += str((length * length) * 2.6)
st += "  1.5 = "
x = ((length * length) * 2.6)  1.5 
st += str(x)
st += " Units"
print(st)

Example #6

Another common case of this error is writing the paths to Windows files without quotes. Here is another example from Stack Overflow:

f = open(C\python\temp\1_copy.cp,"r") 
lines = f.readlines()

for i in lines:  
  thisline = i.split(" ")

  File "<ipython-input-16-b393357b8e86>", line 1
    f = open(C\python\temp\1_copy.cp,"r")
                                               ^
SyntaxError: unexpected character after line continuation character

The full path to the file in code of line #1 must be quoted “”. Plus, a colon : is to be placed after the drive letter in case of Windows paths:

f = open("C:\python\temp\1_copy.cp","r") 
lines = f.readlines()

for i in lines:  
  thisline = i.split(" ")

The Backslash as Escape Character in Python

The backslash is also an escape character in Python:

Use the backslash to escape service characters in a string.

For example, to escape a tab or line feed service character in a string. And because the backslash is a service character on its own (remember, it’s used for line continuation), it needs to be escaped too when used in a string—\.

This is why in the last example the path contains double backslashes \ instead of a single backslash in line of code #1.

However, you don’t need any escapes in a string when you use a raw string. Use the string literal r to get a raw string. Then the example from above can be coded as:

f = open(r"C:pythontemp1_copy.cp","r")

No backslash escapes at all, yay!

Another use case for an escape are Unicode symbols. You can write any Unicode symbol using an escape sequence.

For example, an inverted question mark ¿ has the Unicode 00BF, so you can print it like this: 

print("u00BF")

Additional Examples of “SyntaxError: Unexpected Character After Line Continuation Character” in Python

Here are more common examples of the unexpected character after line continuation character error:

Example #7

Often, you don’t have a specific file or folder path and have to assemble it from parts. You can do so via escape sequences \ and string concatenations . However, this manual piecing together regularly is the reason for the unexpected character after line continuation character error.

But the osmodule to the rescue! Use the path.join function. The path.join function not only does the path completion for you, but also determines the required separators in the path depending on the operating system on which you are running your program.

#os separator examples?

For example:

import os
current_path = os.path.abspath(os.getcwd())
directory = "output"
textfile = "test.txt"
filename = os.path.join(current_path, directory, textfile)

Example #8

You can get the line continuation error when you try to comment out # a line after a line continuation character —you can’t do that in this way:

sonnet = "From fairest creatures we desire increase,n" #line one
"That thereby beauty's rose might never die,n" #line two
"But as the riper should by time decease,n" #line three
"His tender heir might bear his memoryn" #line four
print(sonnet)

  File "<ipython-input-21-0a5c2224492e>", line 1
    sonnet = "From fairest creatures we desire increase,n" #line one
                                                                      ^
SyntaxError: unexpected character after line continuation character

Remember from above that within parenthesis () an escape character is not needed? So put the string in parenthesis (), easy as that—and voila you can use comments # where ever you want.

You can put dummy parentheses, simply for hyphenation purposes:

sonnet = ("From fairest creatures we desire increase,n" #line one 
"That thereby beauty's rose might never die,n" #line two 
"But as the riper should by time decease,n" #line three 
"His tender heir might bear his memoryn") #line four 
print(sonnet)

From fairest creatures we desire increase,
That thereby beauty's rose might never die,
But as the riper should by time decease,
His tender heir might bear his memory

Example #9

Another variation of the unexpected character after line continuation character error is when you try to run a script from the Python prompt. Here is a script correctly launched from the Windows command line:

c:temp>python c:temphelloworld.py

Hello, World!

However, if you type python first and hit enter, you will be taken to the Python prompt.

Here, you can directly run Python code such as print(“Hello, World!”). And if you try to run a file by analogy with the Windows command line, you will get an error:

d:temp>python

Python 3.8.2 (tags/v3.8.2:7b3ab59, Feb 25 2020, 23:03:10) [MSC v.1916 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information.

>>> d:temphelloworld.py

File "", line 1

d:temphelloworld.py
                    ^
SyntaxError: unexpected character after line continuation character

Here’s more Python support:

• 3 Ways to Solve Series Objects Are Mutable and Cannot be Hashed
• How to Solve ‘Tuple’ Object Does Not Support Item Assignment
• How to Solve SyntaxError: Invalid Character in Identifier
• ImportError: Attempted Relative Import With No Known Parent Package
• IndentationError: Unexpected Unindent in Python (and 3 More)