Python imports a module with a string

In Python, you cannot import a module file by using a string:

Import " string "  # Error  "string"import x   #  is not an import string, Instead, import the module file named x

But what if you want to implement the ability to import a module file as a string? There are 3 ways.

Exec

Stitching the import statement into a string and putting it into the EXEC function executes:

' string ' exec (' + modname ')

__import__ function

Call the built-in function __import__:

' string ' __import__ (ModName)

Import_module function

This is the official recommendation, to invoke the Import_module function, first import the importlib:

Import'string'string = Importlib.import_module (modname)

Python imports a module with a string