instantiate a class with a variable

[John]

Hi, is it possible to instantiate a class with a variable.

example

class foo:
def method(self):
pass

x='foo'

Can I use variable x value to create an instance of my class?

Thanks, John

 

[Ben Finney]

class foo:
def method(self):
pass

x='foo'

Can I use variable x value to create an instance of my class?

You seem to be asking "is it possible to call an object whose name is
stored in a string".

The answer is yes::
... pass
... <__main__.Foo instance at 0x401e468c>

Or, more succinctly but rather harder to follow::
... pass
... <__main__.Foo instance at 0x401e46ec>

 

[Cameron Laird]

You seem to be asking "is it possible to call an object whose name is
stored in a string".

The answer is yes::

... pass
...
<__main__.Foo instance at 0x401e468c>

Or, more succinctly but rather harder to follow::

... pass
...
<__main__.Foo instance at 0x401e46ec>

.
.
.
I hope few are so unwary as not to detect the apparent typographical
error
foo_name = 'foo'
for
foo_name = 'Foo'

 

[Ben Finney]

... pass
...

Dang. As Cameron Laird points out, this should be

each time.

Moral of the story: if the example already works, and then you cut and
paste into the message compose window, and then notice that it could
be clearer and edit it some more...

.... always test the example code you're *actually* presenting, after
all edits.

 

[bruno at modulix]

Hi, is it possible to instantiate a class with a variable.

example

class foo:
def method(self):
pass

x='foo'

Can I use variable x value to create an instance of my class?

You got examples using string 'foo', now if all you need is to store or
pass around the class, just use it as any other object (yes, classes
*are* objects):

class Foo(object): pass

x = Foo

f = x()
assert type(f) is Foo

 

[John]

Thanks for the help, this was exactly what I needed. Working Great