Hello all,
I'm trying to write a function that will dynamically generate other
functions via exec. I then want to be able to import the file (module)
containing this function and use it in other modules, but for some
reason it only works using the "import <mod>" syntax, and not "from
<mod> import *" syntax... i.e. in the latter case, the function is
dynamically generated, but not accessible from the importing module.
Any ideas on what I can do to be able to retain the second form of
import and still have the exec'd functions visible?
Here's the code... I have three files:
###################################
# modA.py
def dynamicdef(name, amt):
'''Dynamically defines a new function with the given name that
adds
the given amt to its argument and returns the result.'''
stm = "def %s(x):\n\treturn x + %d" % (name, amt)
print stm
# exec stm # --- with this, 'name' is only accessible within
this fn
exec stm in globals() # --- this makes it global within this
module...
print eval(name)
dynamicdef('plus5', 5)
print plus5(7)
###################################
# modB.py
# This uses the dynamicdef to dynamically define a new function, and
it
# works fine, with the newly defined function being accessible thru
the modA
# module...
import modA
modA.dynamicdef('plus10', 10)
print help(modA.plus5)
print help(modA.plus10)
print modA.plus5(20)
print modA.plus10(20)
###################################
# modC.py
# This uses the dynamicdef to dynamically define a new function, but
it
# doesn't work; seems like knowledge of the newly defined function in
the
# modA module is not propagated back to this context or something...?
from modA import *
dynamicdef('plus10', 10)
print help(plus5)
#print help(plus10) # !!! Fails: NameError: name 'plus10' is not
defined
print plus5(20)
print plus10(20)
###################################
Thanks for any help/suggestions,
---nadeem
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