Pyinstaller, hidden imports not included

I read every manual and answers here, but still don't understand Pyinstaller's behavior.

I'd edited a .spec file where added my imports:

hiddenimports=['ftfy','sqlalchemy','mysql','pymysql','xlrd','xlwt','xlutils']

All of these packages were installed with pip.

Some interesting issues while Pyinstaller builds one-folder:

62573 INFO:   Found 4 sqlalchemy hidden imports
62577 WARNING: Hidden import "pysqlite2" not found!
62580 WARNING: Hidden import "MySQLdb" not found!
67597 WARNING: Hidden import "sqlalchemy.sql.functions.func" not found!
67623 INFO: Import to be excluded not found: 'sqlalchemy.testing'

sqlalchemy really uses other packages, in my project it's a mysql for connecting to MySQL DB. Every lib is in the default directory C:\Python\Lib\site-packages

1. Why after dist is made I see nothing from my hiddenimport? Seems like statement doesn't really work. When I try run .exe:

   FileNotFoundError: [Errno 2] No such file or directory: 'D:\\rs_al\\IdeaProjects\\ExcelToSQL\\PyXLSQL\\dist\\service\\ftfy\\char_classes.dat'
   
   [1668] Failed to execute script service
   

2. Shall I totally trust to pyinstaller analyzed dependencies? I use a small part of pandas and pyinstaller suggests to hook a numpypackage.