Not scaping a scape sign...
internal_delimiter=as in properties
We sometimes need to write with the csv.QUOTE_NONE: probably to write empty stuff, but in the end we didn't need this....or did we?
Also see conection with the quoting issue in one of the files!!!
section_buffer=StringIO() pd.Series(r"""1300 10 \F15 02""").to_csv(section_buffer,header=False, encoding = 'utf-8',index = False) pd.Series(r"""1300 10 \F15 02""").to_csv(section_buffer,header=False, encoding = 'utf-8',index = False,quoting=csv.QUOTE_NONE,escapechar='\',sep=internal_delimiter) pd.Series(r"""1300 10 \F*15 02""").to_csv(section_buffer,header=False, encoding = 'utf-8',index = False,quoting=csv.QUOTE_NONE,escapechar=internal_delimiter,sep=internal_delimiter) section_buffer.seek(0) 0 pd.read_fwf(section_buffer,widths=[7,4,2,6],header=None,escapechar='\',encoding='utf-8') 0 1 2 3 0 1300 10 \F 15 02 1 1300 10 \ F15 0 2 1300 10 \F *15 02 section_buffer.seek(0) 0 pd.read_fwf(section_buffer,widths=[7,4,2,6],header=None,escapechar=internal_delimiter,encoding='utf-8') 0 1 2 3 0 1300 10 \F 15 02 1 1300 10 \ F15 0 2 1300 10 \F *15 02