Python split 函式用法及簡單實現

split(sep=none, maxsplit=-1)

// 例子

string =
'hello world! nice to meet you'
string.
split()
['hello'
,'world!'
,'nice'
,'to'
,'meet'
,'you'
]string.
split
(' ',3
)['hello'
,'world!'
,'nice'
,'to meet you'
]string1, string2 = string.
split
(' ',1
)// 也可以將字串分割後返回給對應的n個目標，但是要注意字串開頭是否存在分隔符，若存在會分割出乙個空字串
string1 =
'hello'
string2 =
'world! nice to meet you'
string.
split
('!'
)// 選擇其他分隔符
['hello world'
,' nice to meet you'
]

def split

(self,
*args,
**kwargs)
: # real signature unknown
"""return a list of the words in the string, using sep as the delimiter string.
septhe delimiter according which to split the string.
none
(the default value) means split according to any whitespace,
and discard empty strings from the result.
maxsplit
maximum number of splits to do.-
1(the default value) means no limit.
""" pass

def my_split

(string, sep, maxsplit)
: ret =
len_sep =
len(sep)
if maxsplit ==-1
: maxsplit =
len(string)+2
for _ in
range
(maxsplit)
: index = string.
find
(sep)
if index ==-1
: ret.
(string)
return ret
else
: ret.
(string[
:index]
) string = string[index + len_sep:
] ret.
(string)
return ret
if __name__ ==
"__main__"
:print
(my_split
("abcded"
,"cd",-
1))print
(my_split
('hello world! nice to meet you'
,' ',3
))

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