How return list on Python and Flask? [duplicate]

-1

This question already has an answer here:

Return JSON response from Flask view

9 answers

I'm trying to return this list in flask. Teacher is a class and returns objects.

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

    teachers.append(teacher)

  return teachers

This code returns the typical error of
TypeError: 'list' object is not callable The view function did not return a valid response.

I'm going crazy and I don't know what's going on. Does anyone know?

Thank you!!

EDIT:

I've already worked it out. The problem was not how to return the list, the problem was the serialization in JSON of the objects.

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

     teacherJson = teacher.to_json()

     teacherData = json.loads(teacherJson)

     teachers.append(teacherData)

  return jsonify({'teachers': teachers})

Thanks for your help.

edited Jan 3 at 8:59

asked Jan 2 at 9:13

mollywind

285

marked as duplicate by davidism flask
Users with the flask badge can single-handedly close flask questions as duplicates and reopen them as needed.

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Jan 2 at 14:01

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

2

Have you tried checking the value in Teacher.objects ? Also, you might need to return response in json. So, you will need to pass this list in json format.

– Sam
Jan 2 at 9:20

2

try return json.dumps(teachers)

– AkshayNevrekar
Jan 2 at 9:21

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:55

add a comment |

-1

This question already has an answer here:

Return JSON response from Flask view

9 answers

I'm trying to return this list in flask. Teacher is a class and returns objects.

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

    teachers.append(teacher)

  return teachers

This code returns the typical error of
TypeError: 'list' object is not callable The view function did not return a valid response.

I'm going crazy and I don't know what's going on. Does anyone know?

Thank you!!

EDIT:

I've already worked it out. The problem was not how to return the list, the problem was the serialization in JSON of the objects.

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

     teacherJson = teacher.to_json()

     teacherData = json.loads(teacherJson)

     teachers.append(teacherData)

  return jsonify({'teachers': teachers})

Thanks for your help.

edited Jan 3 at 8:59

asked Jan 2 at 9:13

mollywind

285

marked as duplicate by davidism flask
Users with the flask badge can single-handedly close flask questions as duplicates and reopen them as needed.

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Jan 2 at 14:01

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

2

Have you tried checking the value in Teacher.objects ? Also, you might need to return response in json. So, you will need to pass this list in json format.

– Sam
Jan 2 at 9:20

2

try return json.dumps(teachers)

– AkshayNevrekar
Jan 2 at 9:21

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:55

add a comment |

-1

This question already has an answer here:

Return JSON response from Flask view

9 answers

I'm trying to return this list in flask. Teacher is a class and returns objects.

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

    teachers.append(teacher)

  return teachers

This code returns the typical error of
TypeError: 'list' object is not callable The view function did not return a valid response.

I'm going crazy and I don't know what's going on. Does anyone know?

Thank you!!

EDIT:

I've already worked it out. The problem was not how to return the list, the problem was the serialization in JSON of the objects.

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

     teacherJson = teacher.to_json()

     teacherData = json.loads(teacherJson)

     teachers.append(teacherData)

  return jsonify({'teachers': teachers})

Thanks for your help.

edited Jan 3 at 8:59

asked Jan 2 at 9:13

mollywind

285

This question already has an answer here:

Return JSON response from Flask view

9 answers

I'm trying to return this list in flask. Teacher is a class and returns objects.

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

    teachers.append(teacher)

  return teachers

This code returns the typical error of
TypeError: 'list' object is not callable The view function did not return a valid response.

I'm going crazy and I don't know what's going on. Does anyone know?

Thank you!!

EDIT:

I've already worked it out. The problem was not how to return the list, the problem was the serialization in JSON of the objects.

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

     teacherJson = teacher.to_json()

     teacherData = json.loads(teacherJson)

     teachers.append(teacherData)

  return jsonify({'teachers': teachers})

Thanks for your help.

This question already has an answer here:

Return JSON response from Flask view

9 answers

python list api flask

edited Jan 3 at 8:59

asked Jan 2 at 9:13

mollywind

285

edited Jan 3 at 8:59

asked Jan 2 at 9:13

mollywind

285

edited Jan 3 at 8:59

asked Jan 2 at 9:13

mollywind

285

asked Jan 2 at 9:13

mollywind

285

asked Jan 2 at 9:13

mollywind

285

marked as duplicate by davidism flask
Users with the flask badge can single-handedly close flask questions as duplicates and reopen them as needed.

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Jan 2 at 14:01

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

marked as duplicate by davidism flask
Users with the flask badge can single-handedly close flask questions as duplicates and reopen them as needed.

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Jan 2 at 14:01

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

2

Have you tried checking the value in Teacher.objects ? Also, you might need to return response in json. So, you will need to pass this list in json format.

– Sam
Jan 2 at 9:20

2

try return json.dumps(teachers)

– AkshayNevrekar
Jan 2 at 9:21

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:55

add a comment |

2

Have you tried checking the value in Teacher.objects ? Also, you might need to return response in json. So, you will need to pass this list in json format.

– Sam
Jan 2 at 9:20

2

try return json.dumps(teachers)

– AkshayNevrekar
Jan 2 at 9:21

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:55

Have you tried checking the value in Teacher.objects ? Also, you might need to return response in json. So, you will need to pass this list in json format.

– Sam
Jan 2 at 9:20

try return json.dumps(teachers)

– AkshayNevrekar
Jan 2 at 9:21

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:55

add a comment |

2 Answers
2

active

oldest

votes

You are returning a list, Flask expects a response to be returned.

from flask import jsonify



@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

    teachers.append(teacher)

  return jsonify({teachers: [teachers]})

answered Jan 2 at 9:27

Samaksh Jain

35327

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:58

add a comment |

You can't return a list directly from flask view.please try to jsonify

from flask import jsonify

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

   teachers = 

   for teacher in Teacher.objects:

      teachers.append(teacher)

   return jsonify(teachers)

answered Jan 2 at 9:25

shijin

11818

add a comment |

2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

You are returning a list, Flask expects a response to be returned.

from flask import jsonify



@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

    teachers.append(teacher)

  return jsonify({teachers: [teachers]})

answered Jan 2 at 9:27

Samaksh Jain

35327

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:58

add a comment |

You are returning a list, Flask expects a response to be returned.

from flask import jsonify



@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

    teachers.append(teacher)

  return jsonify({teachers: [teachers]})

answered Jan 2 at 9:27

Samaksh Jain

35327

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:58

add a comment |

You are returning a list, Flask expects a response to be returned.

from flask import jsonify



@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

    teachers.append(teacher)

  return jsonify({teachers: [teachers]})

answered Jan 2 at 9:27

Samaksh Jain

35327

You are returning a list, Flask expects a response to be returned.

from flask import jsonify



@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

  teachers = 

  for teacher in Teacher.objects:

    teachers.append(teacher)

  return jsonify({teachers: [teachers]})

answered Jan 2 at 9:27

Samaksh Jain

35327

answered Jan 2 at 9:27

Samaksh Jain

35327

answered Jan 2 at 9:27

Samaksh Jain

35327

answered Jan 2 at 9:27

Samaksh Jain

35327

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:58

add a comment |

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:58

This doesn't work, it gives me back this error: TypeError: <Teacher: Teacher object> is not JSON serializable

– mollywind
Jan 2 at 14:58

add a comment |

You can't return a list directly from flask view.please try to jsonify

from flask import jsonify

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

   teachers = 

   for teacher in Teacher.objects:

      teachers.append(teacher)

   return jsonify(teachers)

answered Jan 2 at 9:25

shijin

11818

add a comment |

You can't return a list directly from flask view.please try to jsonify

from flask import jsonify

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

   teachers = 

   for teacher in Teacher.objects:

      teachers.append(teacher)

   return jsonify(teachers)

answered Jan 2 at 9:25

shijin

11818

add a comment |

You can't return a list directly from flask view.please try to jsonify

from flask import jsonify

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

   teachers = 

   for teacher in Teacher.objects:

      teachers.append(teacher)

   return jsonify(teachers)

answered Jan 2 at 9:25

shijin

11818

You can't return a list directly from flask view.please try to jsonify

from flask import jsonify

@app.route('/v1/teachers', methods=['GET'])

def getTeachers():

   teachers = 

   for teacher in Teacher.objects:

      teachers.append(teacher)

   return jsonify(teachers)

answered Jan 2 at 9:25

shijin

11818

answered Jan 2 at 9:25

shijin

11818

answered Jan 2 at 9:25

shijin

11818

answered Jan 2 at 9:25

shijin

11818

add a comment |

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