Python: Dynamic instantiation

Question

I need to make the usage of an object variable to cut way down on lines of code and complexity. Here's the code I'm about to use:

exchange = ccxt.binance({
 'apiKey': 'YOUR_API_KEY',
 'secret': 'YOUR_SECRET',
 'enableRateLimit': True,
 })

I need to make the binance part dynamic since there's probably a few hundred different things that could be in this case. Is there an easy way to do that?

Thanks in advance.

• Gigaflop: What data structure is ccxt?
• nio: do you want to choose which method name you call?
• Frank: In other programming languages, like PHP, this is a very common and easy thing to do: $method = 'mymethod'; $class->{$method}();

Answer 1

If you want to call each time a different method, you can use:

try:
 # get a method and choose it's name runtime
 yourMethod = getattr(ccxt, 'binance')
 # call it
 yourMethod({
 'apiKey': 'YOUR_API_KEY',
 'secret': 'YOUR_SECRET',
 'enableRateLimit': True,
 })
catch AttributeError:
 print "method with that name doesn't exist"