docs: def get_context_from_xlsx(self):
          """
          Get context from an Excel file
          """
          if re.search('^(http|https)://', self.project.CONTEXT_SOURCE_FILE):
              resp = requests.get(self.project.CONTEXT_SOURCE_FILE)
              content = resp.content
          else:
              try:
                  with open(self.project.CONTEXT_SOURCE_FILE) as xlsxfile:
                      content = xlsxfile.read()
              except IOError:
                  filepath = "%s/%s" % (
                      os.path.abspath(self.path),
                      self.project.CONTEXT_SOURCE_FILE)
                  with open(filepath) as xlsxfile:
                      content = xlsxfile.read()
  
          data = process_xlsx(content)
          if 'values' in data:
              data = copy_global_values(data)
  
          return data