# test the __globals__ attribute of a function
#by d@CC
#on 2024BFeb26

progName="fun_globalsB.py"
print("progName:",progName)

def foo():
    pass
    return
#def end

if not hasattr(foo, "__globals__"):
    print("SKIP testing")
    raise SystemExit

print(type(foo.__globals__))
print(foo.__globals__ is globals())

#add a normal (non-global) variable
nmop="a"

#add a non-dunder global variable
global a123
a123 ="abc"
foo.__globals__["barvar"] = a123
print('foo.__globals__["barvar"]:',barvar)

#add a non-dunder global constant
foo.__globals__["bar"] = 123
print('foo.__globals__["bar"]:',bar)

print(globals())
dictA = globals()
n=0
try:
    for pairA in dictA:
        n+=1
        print("n:",n)
        #print(pairA)  #print all global symbols
        pass
except:
    print("ERROR dict pair changed size")
finally:
    print("done")

foo.__globals__["bar"] = None
print('foo.__globals__["bar"]:',bar)

print("trying to set foo.__globals__ to None")
try:
    foo.__globals__ = None
    print('foo.__globals__:',bar)
except AttributeError:
    print("AttributeError")
finally:
    print("after AttributeError")
    print("Issue 01: nmop and a123   are not different in globals()")
    print("Issue 02: a123 and barvar are not different in globals()")   
    print("end of program")
#/fun_globalsB.py