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’, ’’, ’’]
Python | Convert None to empty string Python functions: Questions
Python | Convert None to empty string String Variables: Questions
