Apply list of regex pattern on list python












7















I have data frame in which txt column contains a list. I want to clean the txt column using function clean_text().



data = {'value':['abc.txt', 'cda.txt'], 'txt':['[''2019/01/31-11:56:23.288258 1886     7F0ED4CDC704     asfasnfs: remove datepart'']',

                                               '[''2019/02/01-11:56:23.288258 1886     7F0ED4CDC704     asfasnfs: remove datepart'']']}

df = pandas.DataFrame(data=data)



def clean_text(text):

    """

    :param text:  it is the plain text

    :return: cleaned text

    """

    patterns = [r"^{53}",

                r"[A-Za-z]+[d]+[w]*|[d]+[A-Za-z]+[w]*",

                r"[-=/':,?${}[]-_()>.~" ";+]"]



    for p in patterns:

        text = re.sub(p, '', text)



    return text


My Solution:



df['txt'] = df['txt'].apply(lambda x: clean_text(x))


But I am getting below error:
Error



sre_constants.error: nothing to repeat at position 1





python regex list







share|improve this question

























  • Possible duplicate of Regex sre_constants.error: bad character range

    – sophros
    4 hours ago











  • @sophros, this question is different.

    – user15051990
    4 hours ago











  • in what way it is different? The error is the same.

    – sophros
    4 hours ago
















7















I have data frame in which txt column contains a list. I want to clean the txt column using function clean_text().



data = {'value':['abc.txt', 'cda.txt'], 'txt':['[''2019/01/31-11:56:23.288258 1886     7F0ED4CDC704     asfasnfs: remove datepart'']',

                                               '[''2019/02/01-11:56:23.288258 1886     7F0ED4CDC704     asfasnfs: remove datepart'']']}

df = pandas.DataFrame(data=data)



def clean_text(text):

    """

    :param text:  it is the plain text

    :return: cleaned text

    """

    patterns = [r"^{53}",

                r"[A-Za-z]+[d]+[w]*|[d]+[A-Za-z]+[w]*",

                r"[-=/':,?${}[]-_()>.~" ";+]"]



    for p in patterns:

        text = re.sub(p, '', text)



    return text


My Solution:



df['txt'] = df['txt'].apply(lambda x: clean_text(x))


But I am getting below error:
Error



sre_constants.error: nothing to repeat at position 1





python regex list







share|improve this question

























  • Possible duplicate of Regex sre_constants.error: bad character range

    – sophros
    4 hours ago











  • @sophros, this question is different.

    – user15051990
    4 hours ago











  • in what way it is different? The error is the same.

    – sophros
    4 hours ago














7












7








7








I have data frame in which txt column contains a list. I want to clean the txt column using function clean_text().



data = {'value':['abc.txt', 'cda.txt'], 'txt':['[''2019/01/31-11:56:23.288258 1886     7F0ED4CDC704     asfasnfs: remove datepart'']',

                                               '[''2019/02/01-11:56:23.288258 1886     7F0ED4CDC704     asfasnfs: remove datepart'']']}

df = pandas.DataFrame(data=data)



def clean_text(text):

    """

    :param text:  it is the plain text

    :return: cleaned text

    """

    patterns = [r"^{53}",

                r"[A-Za-z]+[d]+[w]*|[d]+[A-Za-z]+[w]*",

                r"[-=/':,?${}[]-_()>.~" ";+]"]



    for p in patterns:

        text = re.sub(p, '', text)



    return text


My Solution:



df['txt'] = df['txt'].apply(lambda x: clean_text(x))


But I am getting below error:
Error



sre_constants.error: nothing to repeat at position 1





python regex list







share|improve this question
















I have data frame in which txt column contains a list. I want to clean the txt column using function clean_text().



data = {'value':['abc.txt', 'cda.txt'], 'txt':['[''2019/01/31-11:56:23.288258 1886     7F0ED4CDC704     asfasnfs: remove datepart'']',

                                               '[''2019/02/01-11:56:23.288258 1886     7F0ED4CDC704     asfasnfs: remove datepart'']']}

df = pandas.DataFrame(data=data)



def clean_text(text):

    """

    :param text:  it is the plain text

    :return: cleaned text

    """

    patterns = [r"^{53}",

                r"[A-Za-z]+[d]+[w]*|[d]+[A-Za-z]+[w]*",

                r"[-=/':,?${}[]-_()>.~" ";+]"]



    for p in patterns:

        text = re.sub(p, '', text)



    return text


My Solution:



df['txt'] = df['txt'].apply(lambda x: clean_text(x))


But I am getting below error:
Error



sre_constants.error: nothing to repeat at position 1





python regex list




python regex list






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 2 hours ago









coldspeed

130k23134220




130k23134220










asked 5 hours ago









user15051990user15051990

626614




626614













  • Possible duplicate of Regex sre_constants.error: bad character range

    – sophros
    4 hours ago











  • @sophros, this question is different.

    – user15051990
    4 hours ago











  • in what way it is different? The error is the same.

    – sophros
    4 hours ago



















  • Possible duplicate of Regex sre_constants.error: bad character range

    – sophros
    4 hours ago











  • @sophros, this question is different.

    – user15051990
    4 hours ago











  • in what way it is different? The error is the same.

    – sophros
    4 hours ago

















Possible duplicate of Regex sre_constants.error: bad character range

– sophros
4 hours ago





Possible duplicate of Regex sre_constants.error: bad character range

– sophros
4 hours ago













@sophros, this question is different.

– user15051990
4 hours ago





@sophros, this question is different.

– user15051990
4 hours ago













in what way it is different? The error is the same.

– sophros
4 hours ago





in what way it is different? The error is the same.

– sophros
4 hours ago












2 Answers
2






active

oldest

votes


















6














^{53} is not a valid regular expression, since the repeater {53} must be preceded by a character or a pattern that can be repeated. If you mean to make it validate a string that is at least 53 characters long you can use the following pattern instead:



^.{53}





share|improve this answer



















  • 1





    Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • @user15051990 Does ^.{53,} work?

    – MilkyWay90
    1 hour ago



















2














The culprit is the first pattern from the list - r"^{53}". It reads: ^ - match the beginning of the string and then {53} repeat the previous character or group 53 times. Wait... but there is no other character than ^ which cannot be repeated! Indeed. Add a char that you want to match 53 repetitions of. Or, escape the sequence {53} if you want to match it verbatim, e.g. using re.escape.






share|improve this answer
























  • Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • This should really be another question. How a reader of the question can make any sense of the answers if you change the crucial elements of the question?

    – sophros
    4 hours ago











  • Alright I will post it as different question.

    – user15051990
    4 hours ago











  • And before you do that - please revert the change first so that the answers make sense with the question.

    – sophros
    4 hours ago











  • I have post it as different question: stackoverflow.com/questions/54620550/…. Can you please help me in solving.

    – user15051990
    4 hours ago











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2 Answers
2






active

oldest

votes








2 Answers
2






active

oldest

votes









active

oldest

votes






active

oldest

votes









6














^{53} is not a valid regular expression, since the repeater {53} must be preceded by a character or a pattern that can be repeated. If you mean to make it validate a string that is at least 53 characters long you can use the following pattern instead:



^.{53}





share|improve this answer



















  • 1





    Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • @user15051990 Does ^.{53,} work?

    – MilkyWay90
    1 hour ago
















6














^{53} is not a valid regular expression, since the repeater {53} must be preceded by a character or a pattern that can be repeated. If you mean to make it validate a string that is at least 53 characters long you can use the following pattern instead:



^.{53}





share|improve this answer



















  • 1





    Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • @user15051990 Does ^.{53,} work?

    – MilkyWay90
    1 hour ago














6












6








6







^{53} is not a valid regular expression, since the repeater {53} must be preceded by a character or a pattern that can be repeated. If you mean to make it validate a string that is at least 53 characters long you can use the following pattern instead:



^.{53}





share|improve this answer













^{53} is not a valid regular expression, since the repeater {53} must be preceded by a character or a pattern that can be repeated. If you mean to make it validate a string that is at least 53 characters long you can use the following pattern instead:



^.{53}






share|improve this answer












share|improve this answer



share|improve this answer










answered 4 hours ago









blhsingblhsing

31.8k41336




31.8k41336








  • 1





    Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • @user15051990 Does ^.{53,} work?

    – MilkyWay90
    1 hour ago














  • 1





    Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • @user15051990 Does ^.{53,} work?

    – MilkyWay90
    1 hour ago








1




1





Thanks for answer. I have updated question, now I get Attribute error.

– user15051990
4 hours ago





Thanks for answer. I have updated question, now I get Attribute error.

– user15051990
4 hours ago













@user15051990 Does ^.{53,} work?

– MilkyWay90
1 hour ago





@user15051990 Does ^.{53,} work?

– MilkyWay90
1 hour ago













2














The culprit is the first pattern from the list - r"^{53}". It reads: ^ - match the beginning of the string and then {53} repeat the previous character or group 53 times. Wait... but there is no other character than ^ which cannot be repeated! Indeed. Add a char that you want to match 53 repetitions of. Or, escape the sequence {53} if you want to match it verbatim, e.g. using re.escape.






share|improve this answer
























  • Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • This should really be another question. How a reader of the question can make any sense of the answers if you change the crucial elements of the question?

    – sophros
    4 hours ago











  • Alright I will post it as different question.

    – user15051990
    4 hours ago











  • And before you do that - please revert the change first so that the answers make sense with the question.

    – sophros
    4 hours ago











  • I have post it as different question: stackoverflow.com/questions/54620550/…. Can you please help me in solving.

    – user15051990
    4 hours ago
















2














The culprit is the first pattern from the list - r"^{53}". It reads: ^ - match the beginning of the string and then {53} repeat the previous character or group 53 times. Wait... but there is no other character than ^ which cannot be repeated! Indeed. Add a char that you want to match 53 repetitions of. Or, escape the sequence {53} if you want to match it verbatim, e.g. using re.escape.






share|improve this answer
























  • Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • This should really be another question. How a reader of the question can make any sense of the answers if you change the crucial elements of the question?

    – sophros
    4 hours ago











  • Alright I will post it as different question.

    – user15051990
    4 hours ago











  • And before you do that - please revert the change first so that the answers make sense with the question.

    – sophros
    4 hours ago











  • I have post it as different question: stackoverflow.com/questions/54620550/…. Can you please help me in solving.

    – user15051990
    4 hours ago














2












2








2







The culprit is the first pattern from the list - r"^{53}". It reads: ^ - match the beginning of the string and then {53} repeat the previous character or group 53 times. Wait... but there is no other character than ^ which cannot be repeated! Indeed. Add a char that you want to match 53 repetitions of. Or, escape the sequence {53} if you want to match it verbatim, e.g. using re.escape.






share|improve this answer













The culprit is the first pattern from the list - r"^{53}". It reads: ^ - match the beginning of the string and then {53} repeat the previous character or group 53 times. Wait... but there is no other character than ^ which cannot be repeated! Indeed. Add a char that you want to match 53 repetitions of. Or, escape the sequence {53} if you want to match it verbatim, e.g. using re.escape.







share|improve this answer












share|improve this answer



share|improve this answer










answered 4 hours ago









sophrossophros

2,4961728




2,4961728













  • Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • This should really be another question. How a reader of the question can make any sense of the answers if you change the crucial elements of the question?

    – sophros
    4 hours ago











  • Alright I will post it as different question.

    – user15051990
    4 hours ago











  • And before you do that - please revert the change first so that the answers make sense with the question.

    – sophros
    4 hours ago











  • I have post it as different question: stackoverflow.com/questions/54620550/…. Can you please help me in solving.

    – user15051990
    4 hours ago



















  • Thanks for answer. I have updated question, now I get Attribute error.

    – user15051990
    4 hours ago











  • This should really be another question. How a reader of the question can make any sense of the answers if you change the crucial elements of the question?

    – sophros
    4 hours ago











  • Alright I will post it as different question.

    – user15051990
    4 hours ago











  • And before you do that - please revert the change first so that the answers make sense with the question.

    – sophros
    4 hours ago











  • I have post it as different question: stackoverflow.com/questions/54620550/…. Can you please help me in solving.

    – user15051990
    4 hours ago

















Thanks for answer. I have updated question, now I get Attribute error.

– user15051990
4 hours ago





Thanks for answer. I have updated question, now I get Attribute error.

– user15051990
4 hours ago













This should really be another question. How a reader of the question can make any sense of the answers if you change the crucial elements of the question?

– sophros
4 hours ago





This should really be another question. How a reader of the question can make any sense of the answers if you change the crucial elements of the question?

– sophros
4 hours ago













Alright I will post it as different question.

– user15051990
4 hours ago





Alright I will post it as different question.

– user15051990
4 hours ago













And before you do that - please revert the change first so that the answers make sense with the question.

– sophros
4 hours ago





And before you do that - please revert the change first so that the answers make sense with the question.

– sophros
4 hours ago













I have post it as different question: stackoverflow.com/questions/54620550/…. Can you please help me in solving.

– user15051990
4 hours ago





I have post it as different question: stackoverflow.com/questions/54620550/…. Can you please help me in solving.

– user15051990
4 hours ago


















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