Python python对象 enumerate

"""
enumerate(iterable[, start]) -> iterator for index, value of iterable

Return an enumerate object.  iterable must be another object that supports
iteration.  The enumerate object yields pairs containing a count (from
start, which defaults to zero) and a value yielded by the iterable argument.
enumerate is useful for obtaining an indexed list:
    (0, seq[0]), (1, seq[1]), (2, seq[2]), ...
    """
seasons = ['Spring', 'Summer', 'Fall', 'Winter'] # The enumerate object yields pairs containing a count (from start, which defaults to zero) and a value yielded by the iterable argument.
var = list(enumerate(seasons))
print(var) # [(0, 'Spring'), (1, 'Summer'), (2, 'Fall'), (3, 'Winter')]

var =  list(enumerate(seasons, start=1)) # defaults to zero
print(var) #[(1, 'Spring'), (2, 'Summer'), (3, 'Fall'), (4, 'Winter')]