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get 'str' object is not callable" when working with pandas dataframe

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-1

My case is different than the other existing SO post so please do not take it as duplicated. Thanks.

I have a pandas dataframe:

After some concatenation, I added two columns to it as:

I have a function

def sign_url(input_url=None, secret=None):
......
 return original_url + "&signature=" + encoded_signature

I need to add another column to the df with:

df['signed_url'] = df.apply(lambda row: signed_url(str(row['input_url']), secret), axis = 1)

I received error of :

 ----> 1 df['signed_url'] = df.apply(lambda row: signed_url(str(row['input_url']), secret), axis = 1)

 TypeError: ("'str' object is not callable", u'occurred at index 0')

Can anyone help to sort it out please? Thank you very much in advance.

python pandas dataframe

share|improve this question

edited Mar 21 at 15:33

wwii

11.1k31948

asked Mar 21 at 14:48

mdivkmdivk

76021228

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  signed_url is a string, sign_url is your function
  
  – RafaelC
  Mar 21 at 14:50
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  However, apparently you can just do directly df['input_url'] + '&signature=' + secret
  
  – RafaelC
  Mar 21 at 14:52
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thank you for catching that typo so quickly.
  
  – mdivk
  Mar 21 at 14:55
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please don't post images of code or data: copy and paste it as text then format it as code. ... Why not upload images of code on SO when asking a question?. ... stackoverflow.com/help/formatting ... stackoverflow.com/editing-help .
  
  – wwii
  Mar 21 at 15:30
  
  

  
  
  
  

add a comment | 

-1

My case is different than the other existing SO post so please do not take it as duplicated. Thanks.

I have a pandas dataframe:

After some concatenation, I added two columns to it as:

I have a function

def sign_url(input_url=None, secret=None):
......
 return original_url + "&signature=" + encoded_signature

I need to add another column to the df with:

df['signed_url'] = df.apply(lambda row: signed_url(str(row['input_url']), secret), axis = 1)

I received error of :

 ----> 1 df['signed_url'] = df.apply(lambda row: signed_url(str(row['input_url']), secret), axis = 1)

 TypeError: ("'str' object is not callable", u'occurred at index 0')

Can anyone help to sort it out please? Thank you very much in advance.

python pandas dataframe

share|improve this question

edited Mar 21 at 15:33

wwii

11.1k31948

asked Mar 21 at 14:48

mdivkmdivk

76021228

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  signed_url is a string, sign_url is your function
  
  – RafaelC
  Mar 21 at 14:50
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  However, apparently you can just do directly df['input_url'] + '&signature=' + secret
  
  – RafaelC
  Mar 21 at 14:52
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thank you for catching that typo so quickly.
  
  – mdivk
  Mar 21 at 14:55
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please don't post images of code or data: copy and paste it as text then format it as code. ... Why not upload images of code on SO when asking a question?. ... stackoverflow.com/help/formatting ... stackoverflow.com/editing-help .
  
  – wwii
  Mar 21 at 15:30
  
  

  
  
  
  

add a comment | 

My case is different than the other existing SO post so please do not take it as duplicated. Thanks.

I have a pandas dataframe:

After some concatenation, I added two columns to it as:

I have a function

def sign_url(input_url=None, secret=None):
......
 return original_url + "&signature=" + encoded_signature

I need to add another column to the df with:

df['signed_url'] = df.apply(lambda row: signed_url(str(row['input_url']), secret), axis = 1)

I received error of :

 ----> 1 df['signed_url'] = df.apply(lambda row: signed_url(str(row['input_url']), secret), axis = 1)

 TypeError: ("'str' object is not callable", u'occurred at index 0')

Can anyone help to sort it out please? Thank you very much in advance.

python pandas dataframe

share|improve this question

edited Mar 21 at 15:33

wwii

11.1k31948

asked Mar 21 at 14:48

mdivkmdivk

76021228

def sign_url(input_url=None, secret=None):
......
 return original_url + "&signature=" + encoded_signature

 ----> 1 df['signed_url'] = df.apply(lambda row: signed_url(str(row['input_url']), secret), axis = 1)

 TypeError: ("'str' object is not callable", u'occurred at index 0')

share|improve this question

edited Mar 21 at 15:33

wwii

11.1k31948

asked Mar 21 at 14:48

mdivkmdivk

76021228

share|improve this question

edited Mar 21 at 15:33

wwii

11.1k31948

asked Mar 21 at 14:48

mdivkmdivk

76021228

edited Mar 21 at 15:33

wwii

11.1k31948

edited Mar 21 at 15:33

wwii

11.1k31948

asked Mar 21 at 14:48

mdivkmdivk

76021228

asked Mar 21 at 14:48

mdivkmdivk

76021228