使用! =。参见比较运算符。对于比较对象标识，可以使用关键字is和其否定的is not。

e.g.

1 == 1 #  -> True
1 != 1 #  -> False
[] is [] #-> False (distinct objects)
a = b = []; a is b # -> True (same object)

不相等!= (vs equal ==)

你是在问这种事吗?

answer = 'hi'

if answer == 'hi':     # equal
   print "hi"
elif answer != 'hi':   # not equal
   print "no hi"

这个Python -基本操作符图表可能会有帮助。

使用! =。参见比较运算符。对于比较对象标识，可以使用关键字is和其否定的is not。

e.g.

1 == 1 #  -> True
1 != 1 #  -> False
[] is [] #-> False (distinct objects)
a = b = []; a is b # -> True (same object)

使用!=或<>。Both代表不平等。

比较运算符<>和!=是同一运算符的交替拼写。!=是首选的拼写;<>是过时的。(参考:Python语言参考)

你可以简单地做:

if hi == hi:
    print "hi"
elif hi != bye:
     print "no hi"

有一个!=(不相等)操作符，当两个值不同时返回True，但要注意类型，因为“1”!= 1。这将总是返回True，而"1" == 1将总是返回False，因为类型不同。Python是动态的，但是是强类型的，而其他静态类型的语言会抱怨比较不同的类型。

还有else子句:

# This will always print either "hi" or "no hi" unless something unforeseen happens.
if hi == "hi":     # The variable hi is being compared to the string "hi", strings are immutable in Python, so you could use the 'is' operator.
    print "hi"     # If indeed it is the string "hi" then print "hi"
else:              # hi and "hi" are not the same
    print "no hi"

is操作符是对象标识操作符，用于检查两个对象实际上是否相同:

a = [1, 2]
b = [1, 2]
print a == b # This will print True since they have the same values
print a is b # This will print False since they are different objects.