I'm wrote a main python module that need load a file parser to work, initially I was a only one text parser module, but I need add more parsers for different cases.
parser_class1.py
parser_class2.py
parser_class3.py
Only one is required for every running instance, then I'm thinking load it by command line:
mmain.py -p parser_class1
With this purpose I wrote this code in order to select the parser to load when the main module will be called:
#!/usr/bin/env python
import argparse
aparser = argparse.ArgumentParser()
aparser.add_argument('-p',
action='store',
dest='module',
help='-i module to import')
results = aparser.parse_args()
if not results.module:
aparser.error('Error! no module')
try:
exec("import %s" %(results.module))
print '%s imported done!'%(results.module)
except ImportError, e:
print e
But, I was reading that this way is dangerous, maybe not standard.
Then is this approach ok?
or I must find another way to do it?
Why?
__import__rather than 'exec'. This may be relevant to your case. You also have theimportlibmodule as an option. – Jaime Mar 25 '13 at 16:45