在實(shí)際寫程序中，經(jīng)常要對變量類型進(jìn)行判斷，除了用type(變量)這種方法外，還可以用isinstance方法判斷：

a = [1,2]

if 'list' in str(type(a)):

print('1')

else:

print('2')

a = 1

b = [1,2,3,4]

c = (1,2,3,4)

d = {‘a(chǎn)‘: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"

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