how to convert xls to xlsx

Question

I have some *.xls(excel 2003) files， and I want to convert those files into xlsx(excel 2007).

I use the uno python package, when I save the documents, I can set the

Answer 1

Tried @Jhon's solution 1st, then I turned into pyexcel as a solution

pyexcel.save_as(file_name=oldfilename, dest_file_name=newfilename)

It works properly until I tried to package my project to a single exe file by PyInstaller, I tried all hidden imports option, following error still there:

  File "utils.py", line 27, in __enter__
    pyexcel.save_as(file_name=self.filename, dest_file_name=newfilename)
  File "site-packages\pyexcel\core.py", line 77, in save_as
  File "site-packages\pyexcel\internal\core.py", line 22, in get_sheet_stream
  File "site-packages\pyexcel\plugins\sources\file_input.py", line 39, in get_da
ta
  File "site-packages\pyexcel\plugins\parsers\excel.py", line 19, in parse_file
  File "site-packages\pyexcel\plugins\parsers\excel.py", line 40, in _parse_any
  File "site-packages\pyexcel_io\io.py", line 73, in get_data
  File "site-packages\pyexcel_io\io.py", line 91, in _get_data
  File "site-packages\pyexcel_io\io.py", line 188, in load_data
  File "site-packages\pyexcel_io\plugins.py", line 90, in get_a_plugin
  File "site-packages\lml\plugin.py", line 290, in load_me_now
  File "site-packages\pyexcel_io\plugins.py", line 107, in raise_exception
pyexcel_io.exceptions.SupportingPluginAvailableButNotInstalled: Please install p
yexcel-xls
[3192] Failed to execute script

Then, I jumped to pandas:

pd.read_excel(oldfilename).to_excel(newfilename, sheet_name=self.sheetname,index=False)

Update @ 21-Feb 2020

openpyxl provides the function: append

enable the ability to insert rows to a xlxs file which means user could read the data from a xls file and insert them into a xlsx file.

• append([‘This is A1’, ‘This is B1’, ‘This is C1’])
• or append({‘A’ : ‘This is A1’, ‘C’ : ‘This is C1’})
• or append({1 : ‘This is A1’, 3 : ‘This is C1’})

Appends a group of values at the bottom of the current sheet:

• If it’s a list: all values are added in order, starting from the first column
• If it’s a dict: values are assigned to the columns indicated by the keys (numbers or letters)