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Python | Convert String list to Joined Single element

  • Last Updated : 26 Mar, 2020

Sometimes, while working with Python, we can have a problem in which we need to perform the task of joining each element of String list to a single element in List by combining using delim. This kind of application can come in web development domain. Lets discuss certain ways in which this task can be performed.

Method #1 : Using loop
This is one of way to perform this task. In this, we iterate for the String list for strings using loop and perform the join operation according to the delim.




# Python3 code to demonstrate working of 
# Convert String list to Joined Single element
# Using loop
  
# initializing list
test_list = ['gfg', 'is', 'best']
  
# printing original list
print("The original list is : " + str(test_list))
  
# initializing delim 
delim = "-"
  
# Convert String list to Joined Single element
# Using loop
res = ''  
for idx in range(len(test_list)-1):
    res = res + test_list[idx] + delim
if len(test_list) > 0:
        res = res + test_list[-1]
res = [res]
  
# printing result 
print("String after performing join : " + str(res)) 
Output :
The original list is : ['gfg', 'is', 'best']
String after performing join : ['gfg-is-best']

 

Method #2 : Using join() + list comprehension
This task can also be performed using the combination of above functions. In this, we perform the task of combining using join(). The logic is compiled using list comprehension.






# Python3 code to demonstrate working of 
# Convert String list to Joined Single element
# Using join() + list comprehension
  
# initializing list
test_list = ['gfg', 'is', 'best']
  
# printing original list
print("The original list is : " + str(test_list))
  
# initializing delim 
delim = "-"
  
# Convert String list to Joined Single element
# Using join() + list comprehension
res =  [delim.join(test_list)]
  
# printing result 
print("String after performing join : " + str(res)) 
Output :
The original list is : ['gfg', 'is', 'best']
String after performing join : ['gfg-is-best']

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