在实际写程序中，经常要对变量类型进行判断，除了用type(变量)这种方法外，还可以用isinstance方法判断：
a = 1
b = [1,2,3,4]
c = (1,2,3,4)
d = {'a':1, 'b':2, 'c':3}
e = "abc"
if isinstance(a,int):
print ("a is int")
else:
print ("a is not int")
if isinstance(b,list):
print ("b is list")
else:
print ("b is not list")
if isinstance(c,tuple):
print ("c is tuple")
else:
print ("c is not tuple")
if isinstance(d,dict):
print ("d is dict")
else:
print ("d is not dict")
if isinstance(e,str):
print ("d is str")
else:
print ("d is not str")
更多关于python判断变量是否为int、字符串、列表、元组、字典的方法请查看下面的相关链接