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Python | Converting String content to dictionary

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  • Last Updated : 07 Jul, 2019

Sometimes, we are fed with string and we may have to convert it’s content to dictionary. The string may have a specified format that could be key-value convertible. This type of problem is quite common in Machine Learning domain. Let’s discuss certain ways in which this problem can be solved.

Method #1 : Using split() + dictionary comprehension
The combination of above method can be used to perform this particular task. This is 2 process method. In 1st step, the string is converted to list using split and then converted back to dictionary using dictionary comprehension.




# Python3 code to demonstrate working of
# Converting String content to dictionary
# Using dictionary comprehension + split()
  
# initializing string 
test_str = "Gfg = 1, Good = 2, CS = 3, Portal = 4"
  
# printing original string 
print("The original string is : " + test_str)
  
# Using dictionary comprehension + split()
# Converting String content to dictionary
res = {key: int(val) for key, val in (item.split('=')
                   for item in test_str.split(', '))}
  
# printing result 
print("The newly created dictionary : " + str(res))

Output :

The original string is : Gfg = 1, Good = 2, CS = 3, Portal = 4
The newly created dictionary : {' CS ': 3, 'Gfg ': 1, ' Portal ': 4, ' Good ': 2}

 

Method #2 : Using eval()
This particular problem can be solved using the inbuilt function eval which internally evaluates the string and converts the string to dictionary depending upon the condition.




# Python3 code to demonstrate working of
# Converting String content to dictionary
# Using eval()
  
# initializing string 
test_str = "Gfg = 1, Good = 2, CS = 3, Portal = 4"
  
# printing original string 
print("The original string is : " + test_str)
  
# Using eval()
# Converting String content to dictionary
res = eval('dict(% s)' % test_str)
  
# printing result 
print("The newly created dictionary : " + str(res))


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