Method # 1: The Naive Method
This is the most common method that amazes any programmer when doing this kind of operation. Just looping through the entire list and converting each line of the list to int by casting.
| # Python3 demo code
# convert the list of strings to int
# using the naive method
# initializing list test_list = [ ’ 1’ , ’4’ , ’ 3’ , ’6’ , ’ 7’ ]
# Print original list print ( "Original list is: " + str (test_list))
# using the naive method for
# perform conversion for i in range ( 0 , len (test_list)): test_list [i] = int (test_list [i])
# Print modified list print ( "Modified list is:" + str (test_list)) |
Output:
Original list is: [’1’,’ 4’, ’3’,’ 6’, ’7’] Modified list is: [1, 4, 3, 6 , 7]
Method # 2: Using List Comprehension
This is just a kind of copy of the above method, implemented using a list comprehension, a kind of shorthand which the developer is always looking for. This saves time and complexity of coding the solution.
| # Python3 demo code
# list conversion lines to int
# using comprehension list
# initializing list test_list = [ ’1’ , ’ 4 ’ , ’ 3’ , ’6’ , ’ 7’ ]
# Print original list print ( "Original list is:" + str (test_list))
# using a list comprehension for
# perform conversion test_list = [ int (i) for i in test_list]
# Print the modified list print ( "Modified list is:" + str (test_list)) |
Exit:
Original list is: [’1’,’ 4’, ’3’,’ 6’, ’7’] Modified list is : [1, 4, 3, 6, 7]
Method # 3: Using map()
This is the most elegant, pythonic and recommended method for this specific task. This function is intended solely for this kind of task and should be used to accomplish them.
| # Python3 demo code
# convert a list of strings to int
# using map ()
# initializing list test_list = [ ’ 1’ , ’4’ , ’ 3’ , ’6’ , ’ 7’ ]
# Print original list print ( "Original list is: " + str (test_list))
# using map () for
# perform transformation test_list = list ( map ( int , test_list))
# Print modified list print ( "Modified list is:" + < / code> str (test_list)) |
Exit:
Original list is: [’1’,’ 4’, ’3’,’ 6’, ’7’] Modified list is: [1, 4, 3, 6, 7]
Python | Convert all strings in a list to integers Python functions: Questions
Python | Convert all strings in a list to integers String Variables: Questions
Shop
![]()
Best laptop for Fortnite
$
![]()
Best laptop for Excel
$
![]()
Best laptop for Solidworks
$
![]()
Best laptop for Roblox
$
![]()
Best computer for crypto mining
$
Best laptop for Sims 4
$
Best laptop for Zoom
$499
Best laptop for Minecraft
$590
Latest questions
NUMPYNUMPY
psycopg2: insert multiple rows with one query
12 answers
NUMPYNUMPY
How to convert Nonetype to int or string?
12 answers
NUMPYNUMPY
How to specify multiple return types using type-hints
12 answers
NUMPYNUMPY
Javascript Error: IPython is not defined in JupyterLab
12 answers
Wiki
Python OpenCV | cv2.putText () method
numpy.arctan2 () in Python
Python | os.path.realpath () method
Python OpenCV | cv2.circle () method
Python OpenCV cv2.cvtColor () method
Python - Move item to the end of the list
time.perf_counter () function in Python
Check if one list is a subset of another in Python
Python os.path.join () method
