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Python | Convert None to empty string

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Method # 1: Using a Lambda
This task can be accomplished using a lambda function. In this we check a string for None or an empty string using the or operator and replace the None values ​​with an empty string.

# Python3 code to demonstrate how it works
# Convert None to an empty string
# Using lambda

 
# initialize the list of strings

test_list = [ "Geeks" , None , "CS" , None , None ]

  # print original list

print ( "The original list is:" + str (test_list))

 
# using lambda
# Convert None to an empty string

conv = lambda i: i or ’’

res = [conv (i) for i in test_list]

 
# print result and

print ( "The list after conversion of None values: " + str (res))

Output:

 The original list is: [’Geeks’, None,’ CS’, None, None] The list after conversion of None values: [’Geeks’,’ ’,’ CS’, ’’, ’’] 

Method # 2: Using str()
It’s just that the str function can be used to accomplish this particular task, because None also evaluates to False and, hence, it will not be selected, but instead a string converted to false will be returned, which evaluates to an empty string.

# Python3 code to demonstrate how it works
# П convert None to an empty string
# Using str ()

 
# initialize the string list

test_list = [ "Geeks" , None , " CS " , None , None ]

 
# print original list

print ( "The original list is:" + str (test_list))

  
# using str ()
# Convert None to an empty string

res = [ str (i or ’ ’) for i in test_list]

 
# print result

print ( "The list after conversion of None values:" + str (res))

Output:

 The original list is: [’Geeks’, None,’ CS’, None, None] The list after conversion of None va lues: [’Geeks’,’ ’,’ CS’, ’’, ’’] 

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