Python字符串 join() 方法

Python String join() 方法是一个字符串方法，它返回一个字符串，其中序列的元素已通过 str 分隔符连接。

Syntax: 

string_name.join(iterable) 

Parameters: 

The join() method takes iterable – objects capable of returning their members one at a time. Some examples are List, Tuple, String, Dictionary, and Set

Return Value: 

The join() method returns a string concatenated with the elements of iterable. 

Type Error:

If the iterable contains any non-string values, it raises a TypeError exception. 

示例 1：join() 方法的工作

Python

# Python program to demonstrate the
# use of join function to join list
# elements with a character.
 
list1 = ['1','2','3','4']
 
s = "-"
 
# joins elements of list1 by '-'
# and stores in string s
s = s.join(list1)
 
# join use to join a list of
# strings to a separator s
print(s)

输出：

1-2-3-4

示例 2：使用空字符串连接

Python

# Python program to demonstrate the
# use of join function to join list
# elements without any separator.
 
# Joining with empty separator
list1 = ['g','e','e','k', 's']
print("".join(list1))

输出：

geeks