extract a list within a string sequence












2















I have a sequence of string which has a python list within it. It looks like this



"['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"


How can I can retrieve the string enclosed by as the list data type of python?






python list







share|improve this question


















  • 4





    Possible duplicate of Convert string representation of list to list

    – Aquarthur
    Nov 20 '18 at 11:47






  • 3





    Possible duplicate of How to conver String to List withou using eval(Python)

    – Netwave
    Nov 20 '18 at 11:47











  • Is it sure that the string only contains the list or may it contain something else too? I.e., is the following possible: "This is my list ['a', 'b', 'c']. It's a beautiful list.?

    – Tobias Brösamle
    Nov 20 '18 at 11:48
















2















I have a sequence of string which has a python list within it. It looks like this



"['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"


How can I can retrieve the string enclosed by as the list data type of python?






python list







share|improve this question


















  • 4





    Possible duplicate of Convert string representation of list to list

    – Aquarthur
    Nov 20 '18 at 11:47






  • 3





    Possible duplicate of How to conver String to List withou using eval(Python)

    – Netwave
    Nov 20 '18 at 11:47











  • Is it sure that the string only contains the list or may it contain something else too? I.e., is the following possible: "This is my list ['a', 'b', 'c']. It's a beautiful list.?

    – Tobias Brösamle
    Nov 20 '18 at 11:48














2












2








2








I have a sequence of string which has a python list within it. It looks like this



"['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"


How can I can retrieve the string enclosed by as the list data type of python?






python list







share|improve this question














I have a sequence of string which has a python list within it. It looks like this



"['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"


How can I can retrieve the string enclosed by as the list data type of python?






python list




python list






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 20 '18 at 11:44









a_paridaa_parida

17911




17911








  • 4





    Possible duplicate of Convert string representation of list to list

    – Aquarthur
    Nov 20 '18 at 11:47






  • 3





    Possible duplicate of How to conver String to List withou using eval(Python)

    – Netwave
    Nov 20 '18 at 11:47











  • Is it sure that the string only contains the list or may it contain something else too? I.e., is the following possible: "This is my list ['a', 'b', 'c']. It's a beautiful list.?

    – Tobias Brösamle
    Nov 20 '18 at 11:48














  • 4





    Possible duplicate of Convert string representation of list to list

    – Aquarthur
    Nov 20 '18 at 11:47






  • 3





    Possible duplicate of How to conver String to List withou using eval(Python)

    – Netwave
    Nov 20 '18 at 11:47











  • Is it sure that the string only contains the list or may it contain something else too? I.e., is the following possible: "This is my list ['a', 'b', 'c']. It's a beautiful list.?

    – Tobias Brösamle
    Nov 20 '18 at 11:48








4




4





Possible duplicate of Convert string representation of list to list

– Aquarthur
Nov 20 '18 at 11:47





Possible duplicate of Convert string representation of list to list

– Aquarthur
Nov 20 '18 at 11:47




3




3





Possible duplicate of How to conver String to List withou using eval(Python)

– Netwave
Nov 20 '18 at 11:47





Possible duplicate of How to conver String to List withou using eval(Python)

– Netwave
Nov 20 '18 at 11:47













Is it sure that the string only contains the list or may it contain something else too? I.e., is the following possible: "This is my list ['a', 'b', 'c']. It's a beautiful list.?

– Tobias Brösamle
Nov 20 '18 at 11:48





Is it sure that the string only contains the list or may it contain something else too? I.e., is the following possible: "This is my list ['a', 'b', 'c']. It's a beautiful list.?

– Tobias Brösamle
Nov 20 '18 at 11:48












4 Answers
4






active

oldest

votes


















2














Use the literal_eval function from the standard library:



>>> from ast import literal_eval

>>> literal_eval("['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']")

['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']


This is way more safe than using eval directly (source).






share|improve this answer































    2














    Use a regular expression to extract the list:



    re.findall("'(.*?)'",st)
    

    
#['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']





    share|improve this answer

































      1














      Use python's eval function to evaluate the string and get a list



      >>> x = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
      
>>> eval(x)
      
['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']
      
>>> type(eval(x))
      
<class 'list'>


      NOTE:



      eval is dangerous in case you are exposing the code to open world such as a website or an api. eval executes in global namespace and hence could be dangerous.



      Example:
      eval(os.listdir()) gives all files and folder in working directory.






      share|improve this answer





















      • 3





        dont use eval, use ast.literal_eval instead

        – Netwave
        Nov 20 '18 at 11:48











      • That answer is dangerous.

        – Olivier Melançon
        Nov 20 '18 at 12:51



















      0














      You can also achieve your desired result using string operations and slicing:



      string = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
      
wordList = list(map(lambda elem: elem.replace(''','') ,string[1:-1].split(', ')))
      
print(wordList)


      Output:



      ['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']





      share|improve this answer

























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        4 Answers
        4






        active

        oldest

        votes








        4 Answers
        4






        active

        oldest

        votes









        active

        oldest

        votes






        active

        oldest

        votes









        2














        Use the literal_eval function from the standard library:



        >>> from ast import literal_eval
        
>>> literal_eval("['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']")
        
['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']


        This is way more safe than using eval directly (source).






        share|improve this answer




























          2














          Use the literal_eval function from the standard library:



          >>> from ast import literal_eval
          
>>> literal_eval("['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']")
          
['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']


          This is way more safe than using eval directly (source).






          share|improve this answer


























            2












            2








            2







            Use the literal_eval function from the standard library:



            >>> from ast import literal_eval
            
>>> literal_eval("['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']")
            
['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']


            This is way more safe than using eval directly (source).






            share|improve this answer













            Use the literal_eval function from the standard library:



            >>> from ast import literal_eval
            
>>> literal_eval("['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']")
            
['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']


            This is way more safe than using eval directly (source).







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Nov 20 '18 at 11:47









            juliencjulienc

            10k105265




            10k105265

























                2














                Use a regular expression to extract the list:



                re.findall("'(.*?)'",st)
                

                
#['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']





                share|improve this answer






























                  2














                  Use a regular expression to extract the list:



                  re.findall("'(.*?)'",st)
                  

                  
#['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']





                  share|improve this answer




























                    2












                    2








                    2







                    Use a regular expression to extract the list:



                    re.findall("'(.*?)'",st)
                    

                    
#['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']





                    share|improve this answer















                    Use a regular expression to extract the list:



                    re.findall("'(.*?)'",st)
                    

                    
#['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']






                    share|improve this answer














                    share|improve this answer



                    share|improve this answer








                    edited Nov 20 '18 at 11:53

























                    answered Nov 20 '18 at 11:47









                    yatuyatu

                    11k31036




                    11k31036























                        1














                        Use python's eval function to evaluate the string and get a list



                        >>> x = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
                        
>>> eval(x)
                        
['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']
                        
>>> type(eval(x))
                        
<class 'list'>


                        NOTE:



                        eval is dangerous in case you are exposing the code to open world such as a website or an api. eval executes in global namespace and hence could be dangerous.



                        Example:
                        eval(os.listdir()) gives all files and folder in working directory.






                        share|improve this answer





















                        • 3





                          dont use eval, use ast.literal_eval instead

                          – Netwave
                          Nov 20 '18 at 11:48











                        • That answer is dangerous.

                          – Olivier Melançon
                          Nov 20 '18 at 12:51
















                        1














                        Use python's eval function to evaluate the string and get a list



                        >>> x = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
                        
>>> eval(x)
                        
['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']
                        
>>> type(eval(x))
                        
<class 'list'>


                        NOTE:



                        eval is dangerous in case you are exposing the code to open world such as a website or an api. eval executes in global namespace and hence could be dangerous.



                        Example:
                        eval(os.listdir()) gives all files and folder in working directory.






                        share|improve this answer





















                        • 3





                          dont use eval, use ast.literal_eval instead

                          – Netwave
                          Nov 20 '18 at 11:48











                        • That answer is dangerous.

                          – Olivier Melançon
                          Nov 20 '18 at 12:51














                        1












                        1








                        1







                        Use python's eval function to evaluate the string and get a list



                        >>> x = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
                        
>>> eval(x)
                        
['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']
                        
>>> type(eval(x))
                        
<class 'list'>


                        NOTE:



                        eval is dangerous in case you are exposing the code to open world such as a website or an api. eval executes in global namespace and hence could be dangerous.



                        Example:
                        eval(os.listdir()) gives all files and folder in working directory.






                        share|improve this answer















                        Use python's eval function to evaluate the string and get a list



                        >>> x = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
                        
>>> eval(x)
                        
['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']
                        
>>> type(eval(x))
                        
<class 'list'>


                        NOTE:



                        eval is dangerous in case you are exposing the code to open world such as a website or an api. eval executes in global namespace and hence could be dangerous.



                        Example:
                        eval(os.listdir()) gives all files and folder in working directory.







                        share|improve this answer














                        share|improve this answer



                        share|improve this answer








                        edited Nov 20 '18 at 14:25

























                        answered Nov 20 '18 at 11:45









                        VishnudevVishnudev

                        1,156517




                        1,156517








                        • 3





                          dont use eval, use ast.literal_eval instead

                          – Netwave
                          Nov 20 '18 at 11:48











                        • That answer is dangerous.

                          – Olivier Melançon
                          Nov 20 '18 at 12:51














                        • 3





                          dont use eval, use ast.literal_eval instead

                          – Netwave
                          Nov 20 '18 at 11:48











                        • That answer is dangerous.

                          – Olivier Melançon
                          Nov 20 '18 at 12:51








                        3




                        3





                        dont use eval, use ast.literal_eval instead

                        – Netwave
                        Nov 20 '18 at 11:48





                        dont use eval, use ast.literal_eval instead

                        – Netwave
                        Nov 20 '18 at 11:48













                        That answer is dangerous.

                        – Olivier Melançon
                        Nov 20 '18 at 12:51





                        That answer is dangerous.

                        – Olivier Melançon
                        Nov 20 '18 at 12:51











                        0














                        You can also achieve your desired result using string operations and slicing:



                        string = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
                        
wordList = list(map(lambda elem: elem.replace(''','') ,string[1:-1].split(', ')))
                        
print(wordList)


                        Output:



                        ['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']





                        share|improve this answer






























                          0














                          You can also achieve your desired result using string operations and slicing:



                          string = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
                          
wordList = list(map(lambda elem: elem.replace(''','') ,string[1:-1].split(', ')))
                          
print(wordList)


                          Output:



                          ['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']





                          share|improve this answer




























                            0












                            0








                            0







                            You can also achieve your desired result using string operations and slicing:



                            string = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
                            
wordList = list(map(lambda elem: elem.replace(''','') ,string[1:-1].split(', ')))
                            
print(wordList)


                            Output:



                            ['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']





                            share|improve this answer















                            You can also achieve your desired result using string operations and slicing:



                            string = "['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']"
                            
wordList = list(map(lambda elem: elem.replace(''','') ,string[1:-1].split(', ')))
                            
print(wordList)


                            Output:



                            ['How', 'Quebec', 'nationalists', 'see', 'province', 'nation', '1960s?']






                            share|improve this answer














                            share|improve this answer



                            share|improve this answer








                            edited Nov 20 '18 at 15:51

























                            answered Nov 20 '18 at 14:07









                            Vasilis G.Vasilis G.

                            3,6802823




                            3,6802823






























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