Cannot read Excel file from World Bank
*Created originally on Bitbucket by [xpetrovs (Jonáš Petrovský)](https://bitbucket.org/%7B5779a0bc-9c8f-47f8-8d4c-d5a59702c16c%7D/)*
Hello,
I need to read an Excel file exported from World Bank database (http://databank.worldbank.org/data/reports.aspx?source=doing-business).
Unfortunately opening the file (openpyxl.load_workbook) does not work - there is an exception:
```
#!python
AttributeError: 'NoneType' object has no attribute 'upper'
```
I found this SO question (http://stackoverflow.com/questions/34387995/openpyxl-nonetype-object-has-no-attribute-upper), but there is no answer, just that it might be a bug.
I'm using version 2.3.3.
I'm enclosing a small file which also triggers the problem.
Please help, thanks :).
**Traceback**
```
#!python
Traceback (most recent call last):
File "C:/X/test.py", line 8, in <module>
ip = IndicatorsProcessor(file_paths)
File "C:\X\IndicatorsProcessor.py", line 16, in __init__
self.world_bank_workbook = openpyxl.load_workbook(filename=in_bank)
File "C:\Python27\lib\site-packages\openpyxl\reader\excel.py", line 234, in load_workbook
parser.parse()
File "C:\Python27\lib\site-packages\openpyxl\reader\worksheet.py", line 106, in parse
dispatcher[tag_name](element)
File "C:\Python27\lib\site-packages\openpyxl\reader\worksheet.py", line 243, in parse_row_dimensions
self.parse_cell(cell)
File "C:\Python27\lib\site-packages\openpyxl\reader\worksheet.py", line 182, in parse_cell
row, column = coordinate_to_tuple(coordinate)
File "C:\Python27\lib\site-packages\openpyxl\utils\__init__.py", line 162, in coordinate_to_tuple
col, row = coordinate_from_string(coordinate)
File "C:\Python27\lib\site-packages\openpyxl\utils\__init__.py", line 39, in coordinate_from_string
match = COORD_RE.match(coord_string.upper())
AttributeError: 'NoneType' object has no attribute 'upper'
```
*Attachments:* [small_data.xlsx](/uploads/eb73d3b1cf831e684b6f01ccda31c28b/small_data.xlsx)
issue