Documents and backends

We load first a backend - that’s the module that will read the Excel sheet and provide the information to the library. There are 5 provided backends:

• one based on xlrd, that can read xls file and xlsx without

formatting,

• one based on openpyxl that can read xlsx files with some

formatting information

• one is based on win32com and the actual Excel program, with serious performance issues
• raw provides an interface for data stored as list, as well as csv files
• pdfminer provides an interface for pdf files. This feature is experimental and is limited by the amount of information that pdf files can provide.