Ptyhon中join()函数用法

转自http://www.jb51.net/article/63598.htm

 

#对序列进行操作（分别使用' '与':'作为分隔符）
 
>>> seq1 = ['hello','good','boy','doiido']
>>> print ' '.join(seq1)
hello good boy doiido
>>> print ':'.join(seq1)
hello:good:boy:doiido
 
 
#对字符串进行操作
 
>>> seq2 = "hello good boy doiido"
>>> print ':'.join(seq2)
h:e:l:l:o: :g:o:o:d: :b:o:y: :d:o:i:i:d:o
 
 
#对元组进行操作
 
>>> seq3 = ('hello','good','boy','doiido')
>>> print ':'.join(seq3)
hello:good:boy:doiido
 
 
#对字典进行操作
 
>>> seq4 = {'hello':1,'good':2,'boy':3,'doiido':4}
>>> print ':'.join(seq4)
boy:good:doiido:hello
 
 
#合并目录
 
>>> import os
>>> os.path.join('/hello/','good/boy/','doiido')
'/hello/good/boy/doiido'

 

 

string.join(words[, sep])Concatenate a list or tuple of words with intervening occurrences of sep. The default value for sep is a single space character. It is always true that string.join(string.split(s, sep), sep) equals s.

 

str.join(seq)Return a string which is the concatenation of the strings in the sequence seq. The separator between elements is the string providing this method.