Python连接 - 引用值

Question

我正在使用Python连接函数来创建一个字符串，例如

a = [a, b, c, d]
b = ",".join(a)
print b

b = a,b,c,d

但我想要

b = 'a','b','c','d'

有没有办法只使用连接函数（或更短的方式）而不是

b = ""
for x in a:
  b += "'%s'," % x
b = b[:-1]

Answer 1

b = ",".join(map(repr, a))

还可以正确地转义字符串中可能有用的字符。

Answer 2

>>> b = ['a', 'b', 'c', 'd']
>>> print ','.join("'{0}'".format(s) for s in b)
'a','b','c','d'

join（）内的表达式是generator expression。

Answer 3

In [1]: a = ['a', 'b', 'c', 'd']

In [2]: print ','.join("'%s'" % x for x in a)
'a','b','c','d'

Answer 4

b = "'" + "','".join(a) + "'"

：）

Answer 5

a = ['a', 'b', 'c', 'd']

b = "','".join(a).join("''")