Unicode escape python ошибка

In this post, you can find several solutions for: SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated UXXXXXXXX escape While this error can appear in different situations the reason for the error is one and the same: * there are special characters( escape sequence - characters starting with backslash - '' ). * From the error above you can recognize that the culprit is 'U' - which is considered as unicode character. * another possible

In this post, you can find several solutions for:

SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape

While this error can appear in different situations the reason for the error is one and the same:

  • there are special characters( escape sequence — characters starting with backslash — » ).
  • From the error above you can recognize that the culprit is ‘U’ — which is considered as unicode character.
    • another possible errors for SyntaxError: (unicode error) ‘unicodeescape’ will be raised for ‘x’, ‘u’
      • codec can’t decode bytes in position 2-3: truncated xXX escape
      • codec can’t decode bytes in position 2-3: truncated uXXXX escape

Step #1: How to solve SyntaxError: (unicode error) ‘unicodeescape’ — Double slashes for escape characters

Let’s start with one of the most frequent examples — windows paths. In this case there is a bad character sequence in the string:

import json

json_data=open("C:Userstest.txt").read()
json_obj = json.loads(json_data)

The problem is that U is considered as a special escape sequence for Python string. In order to resolved you need to add second escape character like:

import json

json_data=open("C:\Users\test.txt").read()
json_obj = json.loads(json_data)

Step #2: Use raw strings to prevent SyntaxError: (unicode error) ‘unicodeescape’

If the first option is not good enough or working then raw strings are the next option. Simply by adding r (for raw string literals) to resolve the error. This is an example of raw strings:

import json

json_data=open(r"C:Userstest.txt").read()
json_obj = json.loads(json_data)

If you like to find more information about Python strings, literals

2.4.1 String literals

In the same link we can find:

When an r' or R’ prefix is present, backslashes are still used to quote the following character, but all backslashes are left in the string. For example, the string literal r»n» consists of two characters: a backslash and a lowercase `n’.

Step #3: Slashes for file paths -SyntaxError: (unicode error) ‘unicodeescape’

Another possible solution is to replace the backslash with slash for paths of files and folders. For example:

«C:Userstest.txt»

will be changed to:

«C:/Users/test.txt»

Since python can recognize both I prefer to use only the second way in order to avoid such nasty traps. Another reason for using slashes is your code to be uniform and homogeneous.

The picture below demonstrates how the error will look like in PyCharm. In order to understand what happens you will need to investigate the error log.

SyntaxError_unicode_error_unicodeescape

The error log will have information for the program flow as:

/home/vanx/Software/Tensorflow/environments/venv36/bin/python3 /home/vanx/PycharmProjects/python/test/Other/temp.py
  File "/home/vanx/PycharmProjects/python/test/Other/temp.py", line 3
    json_data=open("C:Userstest.txt").read()
                  ^
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated UXXXXXXXX escape

You can see the latest call which produces the error and click on it. Once the reason is identified then you can test what could solve the problem.

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Introduction

The following error message is a common Python error, the «SyntaxError» represents a Python syntax error and the «unicodeescape» means that we made a mistake in using unicode escape character.

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 0-5: truncated UXXXXXXXX escape

Simply to put, the «SyntaxError» can be occurred accidentally in Python and it is often happens because the (ESCAPE CHARACTER) is misused in a python string, it caused the unicodeescape error.

(Note: «escape character» can convert your other character to be a normal character.)

SyntaxError Example

Let’s look at an example:

print('It's a nice day.')

Looks like we want to print «It’s a nice day.«, right? But the program will report an error message.

File "<stdin>", line 1
    print('It's a nice day.')
              ^
SyntaxError: invalid syntax

The reason is very easy-to-know. In Python, we can use print('xxx') to print out xxx. But in our code, if we had used the ' character, the Python interpreter will misinterpret the range of our characters so it will report an error.

To solve this problem, we need to add an escape character «» to convert our ‘ character to be a normal character, not a superscript of string.

print('It's a nice day.')

Output:

It's a nice day.

We print it successfully!

So how did the syntax error happen? Let me talk about my example:

One day, I run my program for experiment, I saved some data in a csv file. In order for this file can be viewed on the Windows OS, I add a new code uFFEF in the beginning of file.

This is «BOM» (Byte Order Mark), Explain to the system that the file format is «Big-Ending«.

I got the error message.

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 0-5: truncated UXXXXXXXX escape

As mentioned at the beginning of this article, this is an escape character error in Python.

Solutions

There are three solutions you can try:

  • Add a «r» character in the right of string
  • Change to be /
  • Change to be \

Solution 1: Add a «r» character in the beginning of string.

title = r'uFFEF'

After we adding a r character at right side of python string, it means a complete string not anything else.

Solution 2: Change to be /.

open("C:UsersClayDesktoptest.txt")

Change to:

open("C:/Users/Clay/Desktop/test.txt")

This way is avoid to use escape character.

Solution 3: Change to be \.

open("C:UsersClayDesktoptest.txt")

Change the code to:

open("C:\Users\Clay\Desktop\test.txt")

It is similar to the solution 2 that it also avoids the use of escape characters.

The above are three common solutions. We can run normally on Windows.

Reference

  • https://stackoverflow.com/questions/37400974/unicode-error-unicodeescape-codec-cant-decode-bytes-in-position-2-3-trunca
  • https://community.alteryx.com/t5/Alteryx-Designer-Discussions/Error-unicodeescape-codec-can-t-decode-bytes/td-p/427540

Read More

  • [Solved][Python] ModuleNotFoundError: No module named ‘cStringIO’
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Table of Contents
Hide
  1. What is SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape?
  2. How to fix SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape?
    1. Solution 1 – Using Double backslash (\)
    2. Solution 2 – Using raw string by prefixing ‘r’
    3. Solution 3 – Using forward slash 
  3. Conclusion

The SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape occurs if you are trying to access a file path with a regular string.

In this tutorial, we will take a look at what exactly (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape means and how to fix it with examples.

The Python String literals can be enclosed in matching single quotes (‘) or double quotes (“). 

String literals can also be prefixed with a letter ‘r‘ or ‘R‘; such strings are called raw strings and use different rules for backslash escape sequences.

They can also be enclosed in matching groups of three single or double quotes (these are generally referred to as triple-quoted strings). 

The backslash () character is used to escape characters that otherwise have a special meaning, such as newline, backslash itself, or the quote character. 

Now that we have understood the string literals. Let us take an example to demonstrate the issue.

import pandas

# read the file
pandas.read_csv("C:UsersitsmycodeDesktoptest.csv")

Output

  File "c:PersonalIJSCodeprogram.py", line 4
    pandas.read_csv("C:UsersitsmycodeDesktoptest.csv")                                                                                     ^
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated UXXXXXXXX escape

We are using the single backslash in the above code while providing the file path. Since the backslash is present in the file path, it is interpreted as a special character or escape character (any sequence starting with ‘’). In particular, “U” introduces a 32-bit Unicode character.

How to fix SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape?

Solution 1 – Using Double backslash (\)

In Python, the single backslash in the string is interpreted as a special character, and the character U(in users) will be treated as the Unicode code point.

We can fix the issue by escaping the backslash, and we can do that by adding an additional backslash, as shown below.

import pandas

# read the file
pandas.read_csv("C:\Users\itsmycode\Desktop\test.csv")

Solution 2 – Using raw string by prefixing ‘r’

We can also escape the Unicode by prefixing r in front of the string. The r stands for “raw” and indicates that backslashes need to be escaped, and they should be treated as a regular backslash.

import pandas

# read the file
pandas.read_csv("C:\Users\itsmycode\Desktop\test.csv")

Solution 3 – Using forward slash 

Another easier way is to avoid the backslash and instead replace it with the forward-slash character(/), as shown below.

import pandas

# read the file
pandas.read_csv("C:/Users/itsmycode/Desktop/test.csv")

Conclusion

The SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape occurs if you are trying to access a file path and provide the path as a regular string.

We can solve the issue by escaping the single backslash with a double backslash or prefixing the string with ‘r,’ which converts it into a raw string. Alternatively, we can replace the backslash with a forward slash.

Ezoic

Avatar Of Srinivas Ramakrishna

Srinivas Ramakrishna is a Solution Architect and has 14+ Years of Experience in the Software Industry. He has published many articles on Medium, Hackernoon, dev.to and solved many problems in StackOverflow. He has core expertise in various technologies such as Microsoft .NET Core, Python, Node.JS, JavaScript, Cloud (Azure), RDBMS (MSSQL), React, Powershell, etc.

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Я использую python 3.1, на машинах windows 7. Русский язык является системным языком по умолчанию, а utf-8-кодировкой по умолчанию.

глядя на ответ на предыдущий вопрос, я пытаюсь использовать модуль «кодеки», чтобы дать мне немного удачи. Вот несколько примеров:

>>> g = codecs.open("C:UsersEricDesktopbeeline.txt", "r", encoding="utf-8")

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-4: truncated UXXXXXXXX escape (<pyshell#39>, line 1)

>>> g = codecs.open("C:UsersEricDesktopSite.txt", "r", encoding="utf-8")

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-4: truncated UXXXXXXXX escape (<pyshell#40>, line 1)

>>> g = codecs.open("C:Python31Notes.txt", "r", encoding="utf-8")

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 11-12: malformed N character escape (<pyshell#41>, line 1)

>>> g = codecs.open("C:UsersEricDesktopSite.txt", "r", encoding="utf-8")

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-4: truncated UXXXXXXXX escape (<pyshell#44>, line 1)

моя последняя идея заключалась в том, что я думал, что это может быть тот факт, что windows «переводит» несколько папок, таких как папка «пользователи», на русский язык (хотя ввод «пользователи правильный путь), поэтому я попробовал его в папке Python31. И все же не повезло. Есть идеи?


43506  


11  

11 ответов:

проблема со строкой

"C:UsersEricDesktopbeeline.txt"

здесь U начинается в восемь символов Unicode бегства, такие как ‘U00014321`. В вашем коде за экранированием следует символ «s», который является недопустимым.

вам либо нужно дублировать все обратные косые черты, либо префикс строки с r (для получения необработанной строки).

типичная ошибка в Windows, потому что каталог пользователя по умолчанию C:user<your_user>, поэтому, когда вы хотите использовать этот путь в качестве строкового параметра в функцию Python, вы получаете ошибку Unicode, просто потому, что u — это Unicode escape. Любой символ не числовой после этого выдает ошибку.

чтобы решить эту проблему, просто удвоить обратную косую черту:C:\user\<your_user>...

префикс с ‘r’ работает очень хорошо, но он должен быть в правильном синтаксисе. Например:

passwordFile = open(r'''C:UsersBobSecretPasswordFile.txt''')

нет необходимости в [двойные обратные косые черты] здесь-поддерживает читаемость и хорошо работает.

см. документ openpyxl, вы можете сделать изменения следующим образом.

from openpyxl import Workbook
from openpyxl.drawing.image import Image

wb = Workbook()
ws = wb.active
ws['A1'] = 'Insert a xxx.PNG'
# Reload an image
img = Image(**r**'x:xxxxxxxxx.png')
# Insert to worksheet and anchor next to cells
ws.add_image(img, 'A2')
wb.save(**r**'x:xxxxxx.xlsx')

С Python 3 у меня была эта проблема:

 self.path = 'T:PythonScriptsProjectsUtilities'

произвел эту ошибку:

 self.path = 'T:PythonScriptsProjectsUtilities'
            ^
 SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in
 position 25-26: truncated UXXXXXXXX escape

исправление, которое сработало:

 self.path = r'T:PythonScriptsProjectsUtilities'

похоже, что «U «создавал ошибку, а «r», предшествующий строке, отключает восьмизначный Unicode escape (для необработанной строки), который не удался. (Это немного чрезмерное упрощение, но оно работает, если вы не заботитесь о unicode)

надеюсь, это поможет кому-то

у меня была такая же ошибка в Python 3.2.

у меня есть скрипт для отправки email и:

csv.reader(open('work_diruslugi1.csv', newline='', encoding='utf-8'))

когда я удаляю первый символ в файле uslugi1.csv работает нормально.

или вы можете заменить ‘ ‘ на ‘ / ‘ в пути.

У меня была такая же ошибка, просто удалил и снова установил пакет numpy, который работал!

path = pd.read_csv(**'C:UsersmraviDesktopfilename'**)

ошибка из-за пути, который упоминается

добавить ‘r’ перед путем

path = pd.read_csv(**r'C:UsersmraviDesktopfilename'**)

это будет работать нормально.

У меня была эта ошибка.
У меня есть основной скрипт python, который вызывает функции из другого, 2-го, скрипта python.
В конце первого скрипта у меня был блок комментариев, обозначенный ''' '''.
Я получал эту ошибку из-за этого блока кода комментария.
Я повторил ошибку несколько раз, как только я нашел его, чтобы убедиться, что это была ошибка, и это было.
Я до сих пор не знаю, почему.

Источник

In Python, This SyntaxError occurred when you are trying to access a path with normal String. As you know ‘/’ is escape character in Python that’s having different meaning by adding with different characters for example ‘n’ is use for ne line , ‘t’ use for tab.

This error is considered as SyntaxError because unicode forward slash () is not allow in path.

In further section of topic you will learn how to handle this problem in Python while writing path of file to access it.

Example of SyntaxError of Unicode Error

Lets take below example to read CSV file in Windows operating system.

import csv
with open('C:Userssaurabh.guptaDesktopPython Exampleinput.csv','r') as csvfile:
    reader=csv.reader(csvfile)
    for record in reader:
        print(record)

If you notice the above code is having path for windows file system to access input.csv. In windows path mentioned by using forward slash () while in Python programming forward slash() is use for handling unicode characters. That’s why when you execute the above program will throw below exception.

Output

File "C:/Users/saurabh.gupta14/Desktop/Python Example/ReadingCSV.py", line 2
    with open('C:Userssaurabh.guptaDesktopPython Exampleinput.csv','r') as csvfile:

Solution

The above error is occurred because of handling forward slash() as normal string. To handle such problem in Python , there are couple of solutions:

1: Just put r in path before your normal string it converts normal string to raw string:

with open(r'C:Userssaurabh.guptaDesktopPython Exampleinput.csv','r')

2: Use back slash (/) instated of forward slash()

with open('C:/Users/saurabh.gupta/Desktop/Python Example/input.csv','r')

3: Use double forward slash (\) instead of forward slash() because in Python the unicode double forward value convert in string as forward slash()’

with open('C:\Users\saurabh.gupta\Desktop\Python Example\input.csv','r')

If this solution help you , Please like and write in comment section or any other way you know to handle this issue write in comment so that help others.

“Learn From Others Experience»

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Hello Guys, How are you all? Hope You all Are Fine. Today I am just trying to read .csv file But I am facing following error SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape in python. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

Contents

  1. How SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape Error Occurs ?
  2. How To Solve SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape Error ?
  3. Solution 1: put r before your path string
  4. Solution 2: doubling the backslashes
  5. Solution 3: Use double quotes and forwardslash character
  6. Solution 4: Use double quotes and escaping backslash character
  7. Solution 5: Use raw prefix and single quotes
  8. Summary

I am just trying to read .csv file But I am facing following error.

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated UXXXXXXXX escape

How To Solve SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape Error ?

  1. How To Solve SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape Error ?

    To Solve SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape Error You just need to put r before your path string Just like this pandas.read_csv(r”C:UserssscDesktopaccount_summery.csv”) OR Just Use double quotes and forwardslash character. Third solution is Just Use double quotes and forwardslash character.

  2. SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape

    To Solve SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2-3: truncated UXXXXXXXX escape Error You just need to put r before your path string Just like this pandas.read_csv(r”C:UserssscDesktopaccount_summery.csv”) OR Just Use double quotes and forwardslash character. Third solution is Just Use double quotes and forwardslash character.

Solution 1: put r before your path string

You just need to put r before your path string Just like this.

pandas.read_csv(r"C:UserssscDesktopaccount_summery.csv")

Solution 2: doubling the backslashes

Just doubling the backslashes Just like this.

pandas.read_csv("C:\Users\DeePak\Desktop\myac.csv")

Solution 3: Use double quotes and forwardslash character

Just Use double quotes and forwardslash character

data = open("C:/Users/ssc/Desktop/account_summery.csv")

Solution 4: Use double quotes and escaping backslash character

Just Use double quotes and escaping backslash character.

data = open("C:\Users\ssc\Desktop\account_summery.csv")

Solution 5: Use raw prefix and single quotes

Just Use raw prefix and single quotes.

data = open(r'C:UserssscDesktopaccount_summery.csv')

Summary

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you?

Also, Read

  • ‘pyinstaller’ is not recognized as an internal or external command operable program or batch file

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