将字符串列表解析成字符列表的两种方法

例如将[‘cat’,‘dog’,‘rabbit’]解析成字符列表
方法一：迭代

wordlist = ['cat','dog','rabbit']
letterlist = [ ]
for aword in wordlist:
    for aletter in aword:
         letterlist.append(aletter)
print(letterlist)

方法二：列表解析（本质也是一种迭代）

wordlist=['cat','dog','rabbit']
letterlist=[aletter for word in wordlist for aletter in word]
print(letterlist)

最后输出都是：

['c', 'a', 't', 'd', 'o', 'g', 'r', 'a', 'b', 'b', 'i', 't']