如果逗号让您感到困扰，您可以使用tuple()指定它为元组。

ex_tuple = ('a', 'b')
ex_tuple += tuple('c')
print(ex_tuple)

tup = (23, 2, 4, 5, 6, 8)
n_tup = tuple(map(lambda x: x+3, tup))
print(n_tup)

你需要使第二个元素为1元组，例如:

a = ('2',)
b = 'z'
new = a + (b,)

如果逗号让您感到困扰，您可以使用tuple()指定它为元组。

ex_tuple = ('a', 'b')
ex_tuple += tuple('c')
print(ex_tuple)

>>> x = (u'2',)
>>> x += u"random string"

Traceback (most recent call last):
  File "<pyshell#11>", line 1, in <module>
    x += u"random string"
TypeError: can only concatenate tuple (not "unicode") to tuple
>>> x += (u"random string", )  # concatenate a one-tuple instead
>>> x
(u'2', u'random string')

# 1的形式

a = ('x', 'y')
b = a + ('z',)
print(b)

# 2的形式

a = ('x', 'y')
b = a + tuple('b')
print(b)