python中判断列表是否为空
一、
>>> test1 = ["ccc","ddd","mmm"]
>>> if test1:
for i in test1:
print(i)
else:
print("empty list")
ccc
ddd
mmm
>>> test1 = []
>>> if test1:
for i in test1:
print(i)
else:
print("empty list")
empty list
二、
>>> test1 = ["ccc","eee","kkk"]
>>> lenlist=len(test1)
>>> if lenlist != 0:
for i in test1:
print(i)
else:
print("empty list")
ccc
eee
kkk
>>> test1 = []
>>> lenlist=len(test1)
>>> if lenlist != 0:
for i in test1:
print(i)
else:
print("empty list")
empty list