Python3 Data load store with file 2
1. Python has built-in access to binary files by pickle serialization. Pandas also provides a convenient way to load and store binaries through pickling.
The save and load methods of the previous version have been replaced in the new version, and binaries can now be pickled and read using the to_pickle and read_pickle methods.
2. Read excel files. Use pd.read_excel to read excel files and return DataFrame objects, but install XLRD and OpenPyXL packages in advance
