Python decoding error on Excel with xlrd - python

I know this is a recurrent subject but I'm facing a encoding/decoding error when trying to parse an Excel file (.xlsx) opened with xlrd
value = sheet.cell(row,col).value
value = value.decode('utf-8') // also tried cp1252 and iso-8859-15
WARNING: 'ascii' codec can't encode character u'\xe9' in position xx: ordinal not in range(128)
xlrd doc says that From Excel 97 onwards, the text in Excel spreadsheets has been stored as Unicode. So decoding should not even be necessary.
Any idea what should be done ?
P.S. My Excel file has some é and à inside.

Still using Python 2? :(
If what you're trying to do is convert from unicode to UTF-8 encoded str, you need to value.encode('utf-8'), not decode.

Related

Pandas read _excel: 'utf-8' codec can't decode byte 0xa8 in position 14: invalid start byte

Trying to read MS Excel file, version 2016. File contains several lists with data. File downloaded from DataBase and it can be opened in MS Office correctly. In example below I changed the file name.
EDIT: file contains russian and english words. Most probably used the Latin-1 encoding, but encoding='latin-1' does not help
import pandas as pd
with open('1.xlsx', 'r', encoding='utf8') as f:
data = pd.read_excel(f)
Result:
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xa8 in position 14: invalid start byte
Without encoding ='utf8'
'charmap' codec can't decode byte 0x9d in position 622: character maps to <undefined>
P.S. Task is to process 52 files, to merge data in every sheet with corresponded sheets in the 52 files. So, please no handle work advices.
The problem is that the original requester is calling read_excel with a filehandle as the first argument. As demonstrated by the last responder, the first argument should be a string containing the filename.
I ran into this same error using:
df = pd.read_excel(open("file.xlsx",'r'))
but correct is:
df = pd.read_excel("file.xlsx")
Most probably you're using Python3. In Python2 this wouldn't happen.
xlsx files are binary (actually they're an xml, but it's compressed), so you need to open them in binary mode. Use this call to open:
open('1.xlsx', 'rb')
There's no full traceback, but I imagine the UnicodeDecodeError comes from the file object, not from read_excel(). That happens because the stream of bytes can contain anything, but we don't want decoding to happen too soon; read_excel() must receive raw bytes and be able to process them.
Most probably the problem is in Russian symbols.
Charmap is default decoding method used in case no encoding is beeing noticed.
As I see if utf-8 and latin-1 do not help then try to read this file not as
pd.read_excel(f)
but
pd.read_table(f)
or even just
f.readline()
in order to check what is a symbol raise an exeception and delete this symbol/symbols.
Panda support encoding feature to read your excel
In your case you can use:
df=pd.read_excel('your_file.xlsx',encoding='utf-8')
or if you want in more of system specific without any surpise you can use:
df=pd.read_excel('your_file.xlsx',encoding='sys.getfilesystemencoding()')

Reading large excel files in Python and UnicodeDecodeError:

I am new to Python and I'm trying to read a large excel file in python. I converted my xlsx file to csv to work with pandas. I wrote the code below:
import pandas as pd
pd.read_csv('filepath.csv')
df = csv.parse("Sheet")
df.head()
But it gives this error:
UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 28: character maps to <undefined>
Can you please tell me why it gives this error? Or do you have any advice to read large excel files? I also tried to work with openpyxl module, but I couldn't use read_only because of version of my Python.(I am using Python 2.7.8)
Save the excel into Unicode Text File with Microsoft Excel.
Open the file with this line:
df = pd.read_csv(filename,sep='\t',encoding='utf-16-le')
print(df.head())
Try with
pd.read_csv('filepath.csv',encoding ='utf-8')
There are many other encoding techniques like encoding = 'iso-8859-1' or encoding = 'cp1252' or encoding = 'latin1'. You can choose as per your requirement.

Python convert csv to xlsx, however getting UnicodeDecodeError

I am trying to convert a csv file to a .xlsx file using PyExcel.
Here is some example data I have in the CSV file.
1.34805E+12,STANDARD,Jose,Sez,,La Pica, 16 o,Renedo de Piélagos,,39470,Spain,,No,No,1231800,2
I am having issues with the special characters, if there are none it line
merge_all_to_a_book(glob.glob("uploadorders.csv"), "uploadorders.xlsx")
Has no problems, however if it does have special characters such as
Piélagos
or
Lücht
I get this error:
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe9 in position 26: invalid continuation byte
I am unsure what to do about this, I have resorted to downloading the file, and re-saving it in excel.
You get the UnicodeDecodeError because the encoding python uses to read the csv is different from the one used to save the file.
Try to save the file as UTF-8 or use the correct encoding to read it: https://docs.python.org/2/howto/unicode.html

Unicode Encode Error when writing pandas df to csv

I cleaned 400 excel files and read them into python using pandas and appended all the raw data into one big df.
Then when I try to export it to a csv:
df.to_csv("path",header=True,index=False)
I get this error:
UnicodeEncodeError: 'ascii' codec can't encode character u'\xc7' in position 20: ordinal not in range(128)
Can someone suggest a way to fix this and what it means?
Thanks
You have unicode values in your DataFrame. Files store bytes, which means all unicode have to be encoded into bytes before they can be stored in a file. You have to specify an encoding, such as utf-8. For example,
df.to_csv('path', header=True, index=False, encoding='utf-8')
If you don't specify an encoding, then the encoding used by df.to_csv defaults to ascii in Python2, or utf-8 in Python3.
Adding an answer to help myself google it later:
One trick that helped me is to encode a problematic series first, then decode it back to utf-8. Like:
df['crumbs'] = df['crumbs'].map(lambda x: x.encode('unicode-escape').decode('utf-8'))
This would get the dataframe to print correctly too.

Python Decoding Uncode files with 'ÆØÅ'

I read in some data from a danish text file. But i can't seem to find a way to decode it.
The original text is "dør" but in the raw text file its stored as "d√∏r"
So i tried the obvious
InputData = "d√∏r"
Print InputData.decode('iso-8859-1')
sadly resulting in the following error:
UnicodeEncodeError: 'ascii' codec can't encode characters in position 1-6: ordinal not in range(128)
UTF-8 gives the same error.
(using Python 2.6.5)
How can i decode this text so the printed message would be "dør"?
C3 B8 is the UTF-8 encoding for "ø". You need to read the file in UTF-8 encoding:
import codecs
codecs.open(myfile, encoding='utf-8')
The reason that you're getting a UnicodeEncodeError is that you're trying to output the text and Python doesn't know what encoding your terminal is in, so it defaults to ascii. To fix this issue, use sys.stdout = codecs.getwriter('utf8')(sys.stdout) or use the environment variable PYTHONIOENCODING="utf-8".
Note that this will give you the text as unicode objects; if everything else in your program is str then you're going to run into compatibility issues. Either convert everything to unicode or (probably easier) re-encode the file into Latin-1 using ustr.encode('iso-8859-1'), but be aware that this will break if anything is outside the Latin-1 codepage. It might be easier to convert your program to use str in utf-8 encoding internally.

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