Dynamic Import module in Python

When the imported module does not exist, it will be reported importerror error, in order to avoid this error can be alternative to other modules or to prefer to use a module or package, you can use the try...except ... How the module or package is imported.

For example:

python 2.6/2.7 provides a JSON module, but Python 2.5 and earlier do not have a JSON module, but you can install a simplejson module, The function signatures and functions provided by these two modules are identical.

Try to write the code to import the JSON module, which can be run correctly in Python 2.5/2.6/2.7

Try:    import jsonexcept importerror:    import Simplejson as Jsonprint json.dumps ({' Python ': 2.7})

Try importing the JSON first, and if it fails, try importing the Simplejson as JSON.

Dynamic Import module in Python