How can I do to check in Python if a particular value is iterate?
What determines that a given type can be iterate?
For example, how do you figure this out in the case below?
a = 1
b = 'Uma string'
c = [1, 2, 3]
d = xrange(1, 10)
e = range(1, 10)
f = {"a" : 1}
g = True
I have not yet seen any article or document citing exactly how to do this in a "great" way. Meanwhile, miku , from StackOverflow in English ,
You can try something like:
1- Assuming that the object is always iterable, and then capturing the error if it is not in the Python style - EAFP (Easier to Ask Forgiveness than Permission) - "better to ask for forgiveness than permission"
try:
_ = (e for e in my_object)
except TypeError:
print my_object, 'is not iterable'
Or:
2- Using the module collections
import collections
if isinstance(e, collections.Iterable):
# e is iterable
Two Pythonic ways to check this out.
try-except
try:
iterator = iter(var)
except TypeError:
# não iterável
else:
# iterável
Only works with new style classes that do not exist in smaller versions than 2.2.
import collections
if isinstance(var, collections.Iterable):
# iterável
else:
# não iterável