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Python – Construct dictionary Key-Value pairs separated by delimiter
  • Last Updated : 30 Aug, 2020

Given a String with key-value pairs separated by delim, construct a dictionary.

Input : test_str = ‘gfg#3, is#9, best#10’, delim = ‘#’
Output : {‘gfg’: ‘3’, ‘is’: ‘9’, ‘best’: ’10’}
Explanation : gfg paired with 3, as separated with # delim.

Input : test_str = ‘gfg.10’, delim = ‘.’
Output : {‘gfg’: ’10’}
Explanation : gfg paired with 10, as separated with . delim.

Method #1 : Using split() + loop

In this, we perform a split on comma, to get key value pairs, and again a split on custom delim to get key value pairs separated. Then assigned to dictionary using loop.



Python3




# Python3 code to demonstrate working of 
# Contruct dictionary Key-Value pairs separated by delim
# Using split() + loop
  
# initializing strings
test_str = 'gfg$3, is$9, best$10'
  
# printing original string
print("The original string is : " + str(test_str))
  
# initializing delim 
delim = "$"
  
# split by comma for getting differnt dict values
dicts = test_str.split(', ')
  
res = dict()
for sub in dicts:
  
    # 2nd split for forming Key-Values for dictionary
    res[sub.split(delim)[0]]  = sub.split(delim)[1]
  
# printing result 
print("The constructed dictionary : " + str(res)) 
Output
The original string is : gfg$3, is$9, best$10
The constructed dictionary : {'gfg': '3', 'is': '9', 'best': '10'}

Method #2 : Using dictionary comprehension + split()

Similar to above method, just the difference being that dictionary comprehension is used for performing task of dictionary construction.

Python3




# Python3 code to demonstrate working of 
# Contruct dictionary Key-Value pairs separated by delim
# Using split() + dictionary comprehension
  
# initializing strings
test_str = 'gfg$3, is$9, best$10'
  
# printing original string
print("The original string is : " + str(test_str))
  
# initializing delim 
delim = "$"
  
# split by comma for getting differnt dict values
dicts = test_str.split(', ')
  
# dictionary comprehension to form dictionary
res = {sub.split(delim)[0] : sub.split(delim)[1] for sub in dicts}
  
# printing result 
print("The constructed dictionary : " + str(res)) 
Output
The original string is : gfg$3, is$9, best$10
The constructed dictionary : {'gfg': '3', 'is': '9', 'best': '10'}

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