Script use reload to reload all submodules inside a module.

reloadall.py

import types
from imp import reload

def status(module):
    print('reloading ' + module.__name__)

def try_reload(module): #FAIL (sometimes in 3.3)
    try:
        reload(module)
    except:
        print('FAILED: %s' % module)

def transitive_reload(module, visited):
    if not module in visited:
        status(module)
        try_reload(module)
        visited.add(module)
        for attr_obj in module.__dict__.values():
            if type(attr_obj) == types.ModuleType:
                transitive_reload(attr_obj, visited)
                
def reload_all(*args):
    visited = set()
    for arg in args:
        if type(arg) == types.ModuleType:
            transitive_reload(arg, visited)
            
def tester(reloader, module_name):
    import importlib, sys
    if len(sys.argv) > 1:
        module_name = sys.argv[1]
    module = importlib.import_module(module_name)
    reloader(module)
    
if __name__ == '__main__':
    tester(reload_all, 'reloadall')