split_join

s1 = "!"
l1 = ['one', 'two', 'three']


s2 = s1.join(l1)
print(s2)           # one!two!three


s3 = "_WoW_".join(l1)
print(s3)           # one_WoW_two_WoW_three


s4 = "*_*".join(['lala', 'lolo', 'lele'])
print(s4)           # lala*_*lolo*_*lele


s5 = "".join(['a', 'b', 'c'])
print(s5)           # abc



s6 = "what are you doing?"
l2 = s6.split(" ")
print(l2)           # ['what', 'are', 'you', 'doing?']


s7 = "one:two:three"
l3 = s7.split(":")
print(l3)           # ['one', 'two', 'three']


s8 = "hello world"
l4 = s8.split('o')
print(l4)           # ['hell', ' w', 'rld']

s9 = "Hello, mtt, 08.67"
spl = ", "
l5 = s9.split(spl)
print(l5)           # ['Hello', 'mtt', '08.67']