from aspose.cells import Workbook

#  For complete examples and data files, please go to https:# github.com/aspose-cells/Aspose.Cells-for-.NET
#  The path to the documents directory.
dataDir = RunExamples.GetDataDir(".")
#  Instantiate workbook object with an Excel file
workbook = Workbook(dataDir + "SampleBook.xlsx")
for i in range(len(workbook.worksheets)):
    workbook.worksheets[i].cells.convert_string_to_numeric_value()
workbook.save(dataDir + "output_out.xlsx")