How to properly convert a list[str] into a list[int]?-CodePudding

I have this route in flask that receive a data from the client side(Angular). I am getting the data with the use of data = request.data.decode("UTF-8") the result will be this one: "[1,2,3,4,5]". In order for me to remove these "[]", I used data1 = data.strip("[]"), the result will be this one "1,2,3,4,5". In order for me to make it a list[str] I used this one data2 = [data1], the output will be now ["1,2,3,4,5"]. Lastly, in order for me to convert it in a list[int], I used this one finalData = list(map(int,data2[0].split(","))), which will result in this one [1,2,3,4,5].

The Problem: But everytime I used this code flask always prompt this error :

File "C:\Users\bagal\Desktop\hello_flask\dummyLogin.py", line 69, in reportData

finalData = list(map(int,data2[0].split(",")))

ValueError: invalid literal for int() with base 10: ''

The Code:

 @app.route("/adminData", methods = ['POST', 'GET'])
    def reportData():
         data = request.data.decode("UTF-8")
         data1 = data.strip("[]")
         data2 = [data1]
        finalData = list(map(int,data2[0].split(",")))

Note: I am using the fetched data in machine learning model, and sorry for a long explanation at the top, hope someone will help.

CodePudding user response：

The entire string looks to be a valid python expression containing only literals. You could use ast.literal_eval() to process the entire string at once.

>>> import ast
>>> ast.literal_eval("[1,2,3,4,5]")
[1, 2, 3, 4, 5]