Unicode error python ошибка

Change that to

# for Python 2.5+
import sys
try:
   d = open("p0901aus.txt","w")
except Exception, ex:
   print "Unsuccessful."
   print ex
   sys.exit(0)

# for Python 3
import sys
import codecs
try:
  d = codecs.open("p0901aus.txt","w","utf-8")
except Exception as ex:
  print("Unsuccessful.")
  print(ex)
  sys.exit(0)

The W is case-sensitive. I do not want to hit you with all the Python syntax at once, but it will be useful for you to know how to display what exception was raised, and this is one way to do it.

Also, you are opening the file for writing, not reading. Is that what you wanted?

If there is already a document named p0901aus.txt, and you want to read it, do this:

#for Python 2.5+
import sys
try:
   d = open("p0901aus.txt","r")
   print "Awesome, I opened p0901aus.txt.  Here is what I found there:"
   for l in d:
      print l
except Exception, ex:
   print "Unsuccessful."
   print ex
   sys.exit(0)

#for Python 3+
import sys
import codecs
try:
   d = codecs.open("p0901aus.txt","r","utf-8")
   print "Awesome, I opened p0901aus.txt.  Here is what I found there:"
   for l in d:
      print(l)
except Exception, ex:
   print("Unsuccessful.")
   print(ex)
   sys.exit(0)

You can of course use the codecs in Python 2.5 also, and your code will be higher quality («correct») if you do. Python 3 appears to treat the Byte Order Mark as something between a curiosity and line noise which is a bummer.

>>> 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)

11 ответов:

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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")

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

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