Re: Re: Re: porting unittest.py to Prothon.

Mark Hahn wrote:
> I intentionally removed " from os import *" from Prothon.  I considered it a
> bad feature in Python.  Feel free to argue.

How do I do "from math import *"? I hope you don't suggest
writing
math.sin(x) + math.cos(y)

If the module is just a collection of functions like pyCompat
or math, the ability to say "import all functions" is needed.

>>>> from os import system
>>
>> Uncaught exception:
>> --- File: fromosimportsystem-src.txt, line: 2, char: 1
>> Program Error, No main module set for importing.

> This is a problem with the console.  I will fix this.

>> I've come up with a hack:
>> import pyCompat
>> pyCompat.exportNames("*")
>>
>> I called it a hack because messing with stack is considered
>> a quick hack in Python. But after I used it for a while I
>> realized:
>> 1. I doesn't feel like like hack using caller :)
>> 2. It provides more functionality then "from X import *"
>>   a. I don't want to override existing objects like range(),
>>      "from X import *" doesn't let me control it.
>>   b. I can implement .exportFewerNames() because I'm going
>>      to play with the idea of incremental removing of
>>      Python functionality from the ported module.

> Can you post the code?

the fix for bug 38 broke it, but here is the relevant code

name_ = "future"
# work around for lack of globals()
if isMain?():
    myModule = Main
else:
    myModule = sys.modules.attrs_.get(Symbol(name_))



allExportNames = """AttributeError ImportError abs enumerate isinstance type"""
allExportSymbols = [Symbol(name) for name in splitNames(allExportNames)]

def exportNames(namesStr):
    """export names into caller's namespace

    namesStr is a whitespace separated list of functions to export,
    a special name * means export all functions.
    """

    namesList = splitNames(namesStr)
    for name in namesList:
        if name == "*":
            symbolsToExport.extend!(allExportSymbols)
            continue
        symbol = Symbol(name)
        if symbol not in allExportSymbols:
            raise ImportError("module {name_} does not export symbol {name}".fmt())
        symbolsToExport.append!(symbol)
    for symbol in symbolsToExport:
        caller.attrs_[symbol] = myModule.attrs_[symbol]



  -- Serge