TypeError: super() takes at least 1 argument (0 given) error is specific to any python version?

I'm getting this error

TypeError: super() takes at least 1 argument (0 given)

using this code on python2.7.11:

class Foo(object):

    def __init__(self):

        pass



class Bar(Foo):

    def __init__(self):

        super().__init__()



Bar()

The workaround to make it work would be:

class Foo(object):

    def __init__(self):

        pass



class Bar(Foo):

    def __init__(self):

        super(Bar, self).__init__()



Bar()

It seems the syntax is specific to python 3. So, what's the best way to provide compatible code between 2.x and 3.x and avoiding this error happening?

edited Aug 15 '16 at 21:15

asked Aug 15 '16 at 21:03

BPL

5,14341855

1

That syntax is for Python 3.

– Daniel Roseman
Aug 15 '16 at 21:07

@DanielRoseman I see, thanks. To make my question a little bit more useful then I've edited a little bit asking some extra stuff

– BPL
Aug 15 '16 at 21:16

1

The Python 2 syntax is still valid in Python 3 in this case; if you want to support both versions, use that. Note however that there are lots of other incompatibilities between the versions.

– Daniel Roseman
Aug 15 '16 at 21:19

@DanielRoseman Alright, tyvm. All clear then :)

– BPL
Aug 15 '16 at 21:21

add a comment |

I'm getting this error

TypeError: super() takes at least 1 argument (0 given)

using this code on python2.7.11:

class Foo(object):

    def __init__(self):

        pass



class Bar(Foo):

    def __init__(self):

        super().__init__()



Bar()

The workaround to make it work would be:

class Foo(object):

    def __init__(self):

        pass



class Bar(Foo):

    def __init__(self):

        super(Bar, self).__init__()



Bar()

It seems the syntax is specific to python 3. So, what's the best way to provide compatible code between 2.x and 3.x and avoiding this error happening?

edited Aug 15 '16 at 21:15

asked Aug 15 '16 at 21:03

BPL

5,14341855

1

That syntax is for Python 3.

– Daniel Roseman
Aug 15 '16 at 21:07

@DanielRoseman I see, thanks. To make my question a little bit more useful then I've edited a little bit asking some extra stuff

– BPL
Aug 15 '16 at 21:16

1

The Python 2 syntax is still valid in Python 3 in this case; if you want to support both versions, use that. Note however that there are lots of other incompatibilities between the versions.

– Daniel Roseman
Aug 15 '16 at 21:19

@DanielRoseman Alright, tyvm. All clear then :)

– BPL
Aug 15 '16 at 21:21

add a comment |

I'm getting this error

TypeError: super() takes at least 1 argument (0 given)

using this code on python2.7.11:

class Foo(object):

    def __init__(self):

        pass



class Bar(Foo):

    def __init__(self):

        super().__init__()



Bar()

The workaround to make it work would be:

class Foo(object):

    def __init__(self):

        pass



class Bar(Foo):

    def __init__(self):

        super(Bar, self).__init__()



Bar()

It seems the syntax is specific to python 3. So, what's the best way to provide compatible code between 2.x and 3.x and avoiding this error happening?

edited Aug 15 '16 at 21:15

asked Aug 15 '16 at 21:03

BPL

5,14341855

I'm getting this error

TypeError: super() takes at least 1 argument (0 given)

using this code on python2.7.11:

class Foo(object):

    def __init__(self):

        pass



class Bar(Foo):

    def __init__(self):

        super().__init__()



Bar()

The workaround to make it work would be:

class Foo(object):

    def __init__(self):

        pass



class Bar(Foo):

    def __init__(self):

        super(Bar, self).__init__()



Bar()

It seems the syntax is specific to python 3. So, what's the best way to provide compatible code between 2.x and 3.x and avoiding this error happening?

python python-2.7 python-2.x

edited Aug 15 '16 at 21:15

asked Aug 15 '16 at 21:03

BPL

5,14341855

edited Aug 15 '16 at 21:15

asked Aug 15 '16 at 21:03

BPL

5,14341855

edited Aug 15 '16 at 21:15

asked Aug 15 '16 at 21:03

BPL

5,14341855

asked Aug 15 '16 at 21:03

BPL

5,14341855

asked Aug 15 '16 at 21:03

BPL

5,14341855

1

That syntax is for Python 3.

– Daniel Roseman
Aug 15 '16 at 21:07

@DanielRoseman I see, thanks. To make my question a little bit more useful then I've edited a little bit asking some extra stuff

– BPL
Aug 15 '16 at 21:16

1

The Python 2 syntax is still valid in Python 3 in this case; if you want to support both versions, use that. Note however that there are lots of other incompatibilities between the versions.

– Daniel Roseman
Aug 15 '16 at 21:19

@DanielRoseman Alright, tyvm. All clear then :)

– BPL
Aug 15 '16 at 21:21

add a comment |

1

That syntax is for Python 3.

– Daniel Roseman
Aug 15 '16 at 21:07

@DanielRoseman I see, thanks. To make my question a little bit more useful then I've edited a little bit asking some extra stuff

– BPL
Aug 15 '16 at 21:16

1

The Python 2 syntax is still valid in Python 3 in this case; if you want to support both versions, use that. Note however that there are lots of other incompatibilities between the versions.

– Daniel Roseman
Aug 15 '16 at 21:19

@DanielRoseman Alright, tyvm. All clear then :)

– BPL
Aug 15 '16 at 21:21

That syntax is for Python 3.

– Daniel Roseman
Aug 15 '16 at 21:07

@DanielRoseman I see, thanks. To make my question a little bit more useful then I've edited a little bit asking some extra stuff

– BPL
Aug 15 '16 at 21:16

The Python 2 syntax is still valid in Python 3 in this case; if you want to support both versions, use that. Note however that there are lots of other incompatibilities between the versions.

– Daniel Roseman
Aug 15 '16 at 21:19

@DanielRoseman Alright, tyvm. All clear then :)

– BPL
Aug 15 '16 at 21:21

add a comment |

3 Answers
3

active

oldest

votes

Yes, the 0-argument syntax is specific to Python 3, see What's New in Python 3.0 and PEP 3135 -- New Super.

In Python 2 and code that must be cross-version compatible, just stick to passing in the class object and instance explicitly.

Yes, there are "backports" available that make a no-argument version of super() work in Python 2 (like the future library) but these require a number of hacks that include a full scan of the class hierarchy to find a matching function object. This is both fragile and slow, and simply not worth the "convenience".

answered Aug 15 '16 at 23:03

Martijn Pieters♦

713k13724862303

add a comment |

You can use the future library to have a Python2/Python3 compatibility.

The super function is back-ported.

answered Aug 15 '16 at 21:35

Laurent LAPORTE

11.2k22957

1

Oh boy, but that implementation. Stack frame inspection and a full traverse of the namespaces of the MRO to find the context? I can't recommend actually using this.

– Martijn Pieters♦
Aug 15 '16 at 22:49

12

Just use super(ClassName, self) and repeat yourself a little.

– Martijn Pieters♦
Aug 15 '16 at 22:50

add a comment |

This is because of version of python. Check your python version with [python --version] it might be 2.7

In 2.7 use this [ super(baseclass, self).__init__() ]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super(Bird,self).__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

> In 3.0 or more use this [ super().__init__()]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super().__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

answered Nov 14 '18 at 16:57

Viraj.Hadoop

2559

add a comment |

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

Yes, the 0-argument syntax is specific to Python 3, see What's New in Python 3.0 and PEP 3135 -- New Super.

In Python 2 and code that must be cross-version compatible, just stick to passing in the class object and instance explicitly.

answered Aug 15 '16 at 23:03

Martijn Pieters♦

713k13724862303

add a comment |

Yes, the 0-argument syntax is specific to Python 3, see What's New in Python 3.0 and PEP 3135 -- New Super.

In Python 2 and code that must be cross-version compatible, just stick to passing in the class object and instance explicitly.

answered Aug 15 '16 at 23:03

Martijn Pieters♦

713k13724862303

add a comment |

Yes, the 0-argument syntax is specific to Python 3, see What's New in Python 3.0 and PEP 3135 -- New Super.

In Python 2 and code that must be cross-version compatible, just stick to passing in the class object and instance explicitly.

answered Aug 15 '16 at 23:03

Martijn Pieters♦

713k13724862303

Yes, the 0-argument syntax is specific to Python 3, see What's New in Python 3.0 and PEP 3135 -- New Super.

In Python 2 and code that must be cross-version compatible, just stick to passing in the class object and instance explicitly.

answered Aug 15 '16 at 23:03

Martijn Pieters♦

713k13724862303

answered Aug 15 '16 at 23:03

Martijn Pieters♦

713k13724862303

answered Aug 15 '16 at 23:03

Martijn Pieters♦

713k13724862303

answered Aug 15 '16 at 23:03

Martijn Pieters♦

713k13724862303

add a comment |

You can use the future library to have a Python2/Python3 compatibility.

The super function is back-ported.

answered Aug 15 '16 at 21:35

Laurent LAPORTE

11.2k22957

1

Oh boy, but that implementation. Stack frame inspection and a full traverse of the namespaces of the MRO to find the context? I can't recommend actually using this.

– Martijn Pieters♦
Aug 15 '16 at 22:49

12

Just use super(ClassName, self) and repeat yourself a little.

– Martijn Pieters♦
Aug 15 '16 at 22:50

add a comment |

You can use the future library to have a Python2/Python3 compatibility.

The super function is back-ported.

answered Aug 15 '16 at 21:35

Laurent LAPORTE

11.2k22957

1

Oh boy, but that implementation. Stack frame inspection and a full traverse of the namespaces of the MRO to find the context? I can't recommend actually using this.

– Martijn Pieters♦
Aug 15 '16 at 22:49

12

Just use super(ClassName, self) and repeat yourself a little.

– Martijn Pieters♦
Aug 15 '16 at 22:50

add a comment |

You can use the future library to have a Python2/Python3 compatibility.

The super function is back-ported.

answered Aug 15 '16 at 21:35

Laurent LAPORTE

11.2k22957

You can use the future library to have a Python2/Python3 compatibility.

The super function is back-ported.

answered Aug 15 '16 at 21:35

Laurent LAPORTE

11.2k22957

answered Aug 15 '16 at 21:35

Laurent LAPORTE

11.2k22957

answered Aug 15 '16 at 21:35

Laurent LAPORTE

11.2k22957

answered Aug 15 '16 at 21:35

Laurent LAPORTE

11.2k22957

1

Oh boy, but that implementation. Stack frame inspection and a full traverse of the namespaces of the MRO to find the context? I can't recommend actually using this.

– Martijn Pieters♦
Aug 15 '16 at 22:49

12

Just use super(ClassName, self) and repeat yourself a little.

– Martijn Pieters♦
Aug 15 '16 at 22:50

add a comment |

1

Oh boy, but that implementation. Stack frame inspection and a full traverse of the namespaces of the MRO to find the context? I can't recommend actually using this.

– Martijn Pieters♦
Aug 15 '16 at 22:49

12

Just use super(ClassName, self) and repeat yourself a little.

– Martijn Pieters♦
Aug 15 '16 at 22:50

Oh boy, but that implementation. Stack frame inspection and a full traverse of the namespaces of the MRO to find the context? I can't recommend actually using this.

– Martijn Pieters♦
Aug 15 '16 at 22:49

Just use super(ClassName, self) and repeat yourself a little.

– Martijn Pieters♦
Aug 15 '16 at 22:50

add a comment |

This is because of version of python. Check your python version with [python --version] it might be 2.7

In 2.7 use this [ super(baseclass, self).__init__() ]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super(Bird,self).__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

> In 3.0 or more use this [ super().__init__()]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super().__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

answered Nov 14 '18 at 16:57

Viraj.Hadoop

2559

add a comment |

This is because of version of python. Check your python version with [python --version] it might be 2.7

In 2.7 use this [ super(baseclass, self).__init__() ]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super(Bird,self).__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

> In 3.0 or more use this [ super().__init__()]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super().__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

answered Nov 14 '18 at 16:57

Viraj.Hadoop

2559

add a comment |

This is because of version of python. Check your python version with [python --version] it might be 2.7

In 2.7 use this [ super(baseclass, self).__init__() ]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super(Bird,self).__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

> In 3.0 or more use this [ super().__init__()]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super().__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

answered Nov 14 '18 at 16:57

Viraj.Hadoop

2559

This is because of version of python. Check your python version with [python --version] it might be 2.7

In 2.7 use this [ super(baseclass, self).__init__() ]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super(Bird,self).__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

> In 3.0 or more use this [ super().__init__()]

class Bird(object):

    def __init__(self):

        print("Bird")



    def whatIsThis(self):

        print("This is bird which can not swim")



class Animal(Bird):

    def __init__(self):

        super().__init__()

        print("Animal")



    def whatIsThis(self):

        print("THis is animal which can swim")



a1 = Animal()

a1.whatIsThis()

answered Nov 14 '18 at 16:57

Viraj.Hadoop

2559

answered Nov 14 '18 at 16:57

Viraj.Hadoop

2559

answered Nov 14 '18 at 16:57

Viraj.Hadoop

2559

answered Nov 14 '18 at 16:57

Viraj.Hadoop

2559

add a comment |

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