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How to Lazy-Load a Python Module Import with Example

To dynamically load or lazy-load a python module, do the following:

Python
import_str = 'from pprint import pprint'
exec import_str

A more complete example with error catching.

Python
module_name = 'bar'
definition = 'my_method'
import_str = 'from foo.{0} import {1}'.format(module_name, definition)
 
try:
    exec import_str
except ImportError:
    print 'import failed:', import_str
else:
    from pprint import pprint
    pprint(locals())