Delphi and C/C++ data type comparison table && struct and C data type comparison table
Reference article:
https://docs.python.org/3/library/struct.html#format-characters
https://www.cnblogs.com/findumars/p/7147604.html
https://blog.csdn.net /diligentcatrich/article/details/8171906
Note: The struct module is a disadvantage. The int type or other types are not unlimited. When the integer is greater than a certain value, it will fail, that is, int or related types have size restrictions (int For: 9 digits).