如何检查列表是否为空？

Question

For example, if passed the following:

a = []

How do I check to see if a is empty?

转载于:https://stackoverflow.com/questions/53513/how-do-i-check-if-a-list-is-empty

Answer 1

if not a:
  print("List is empty")

Using the implicit booleanness of the empty list is quite pythonic.