Home/ sam/Answers
Ask sam
  1. Asked: February 18, 2023In:

    Parser Classes in Django REST

    sam

    JSONParser It parses the incoming request JSON content into python content type dict. It is used if "Content-Type" is set to "application/json". FormParser It parses the incoming request form contents into QueryDict. It is used if "Content-Type" is set to "application/x-www-form-urlencoded". MultiPaRead more

    JSONParser

    • It parses the incoming request JSON content into python content type dict.
    • It is used if “Content-Type” is set to “application/json”.

    FormParser

    • It parses the incoming request form contents into QueryDict.
    • It is used if “Content-Type” is set to “application/x-www-form-urlencoded”.

    MultiPartParser

    • It parses the incoming request form contents into QueryDict.
    • It is used if “Content-Type” is set to “multipart/form-data”.
    • request.data will be a QueryDict containing all the form parameters.
    • request.files will be a QueryDict containing all the form files.
    • FormParser and MultiPartParser together used for full support of HTML form data.

    FileUploadParser

    • It is used to parse a single file sent in HTTP request.
    • It expects a url keyword argument “filename”. If it’s not provided then we should provide the filename in the Content-Disposition HTTP header. For example Content-Disposition: attachment; filename=upload.jpg.
    • request.file is used to access the contents of uploaded file.
    See less
    • 0
  2. Asked: February 15, 2023In:

    An error occurred (IllegalLocationConstraintException) when calling the CreateBucket operation

    sam

    create the bucket by changing the name. I think this error was thrown because the name was not unique,

    create the bucket by changing the name. I think this error was thrown because the name was not unique,

    See less
    • 0
  3. Asked: January 5, 2023In:

    SyntaxError: default ‘except:’ must be last

    sam
    This answer was edited.

    You can't get a new one except after the rest. Try, except, and other blocks are not like function calls or other code - you can't just mix and match them as you want. It's always an exact sequence: try: # execute some code except: # if that code raises an error, go here else: # if the "try" code diRead more

    You can’t get a new one except after the rest. Try, except, and other blocks are not like function calls or other code – you can’t just mix and match them as you want. It’s always an exact sequence:

    try:
    # execute some code
except:
    # if that code raises an error, go here
else:
    # if the "try" code did not raise an error, go here
    See less
    • 0
  4. Asked: January 5, 2023In:

    SyntaxError: default ‘except:’ must be last

    sam
    This answer was edited.

    The order is Try, Except, Else should get  

    The order is Try, Except, Else should get

     

    See less
    • 0
  5. Asked: January 3, 2023In:

    When i should use python function nesting?

    sam

    Encapsulation and closure/ factory functions are two of the most common reasons for using nested functions.

    Encapsulation and closure/ factory functions are two of the most common reasons for using nested functions.

    See less
    • 0
  6. Asked: January 2, 2023In:

    any() and all() in Python

    sam

    any() in python: The any() function gives a boolean value. True if one or more elements in an iteration is true. False if all items are false or if an iteration is blank. all() in python: True - If all elements of the iteration are true. False - If any element in an iterable is false

    any() in python:

    The any() function gives a boolean value.

    • True if one or more elements in an iteration is true.
    • False if all items are false or if an iteration is blank.

    all() in python:

    • True – If all elements of the iteration are true.
    • False – If any element in an iterable is false
    See less
    • 0
  7. Asked: November 11, 2022In:

    what are rules for Primary key in mysql/sql

    sam

    what are rules for Primary key in mysql/sql: Primary key column must be unique. Each and every table should be one primary key column. In the primary key column cannot be null or empty.

    what are rules for Primary key in mysql/sql:

    • Primary key column must be unique.
    • Each and every table should be one primary key column.
    • In the primary key column cannot be null or empty.
    See less
    • 0
  8. Asked: October 25, 2022In:

    How can I remove an item from a list in Python?

    sam
    This answer was edited.

    About List: To create an empty list we need to use [] Example: data = [] Items in the List are separated with the comma (,) List is Mutable(i.e. Mutable is when something is changeable) We can store different types of data in a List that is called Heterogeneous. List is a ordered You can access theRead more

    About List:

    • To create an empty list we need to use []
      • Example: data = []
    • Items in the List are separated with the comma (,)
    • List is Mutable(i.e. Mutable is when something is changeable)
    • We can store different types of data in a List that is called Heterogeneous.
    • List is a ordered
    • You can access the list elements by index

    Remove an element from a list in Python:

    You can use clear(), pop(), remove() and del() methods to remove elements from a list.

    methods are:

    • clear()
    • pop()
    • remove()
    • del()

    Using clear() method: in python, you can remove all elements using the clear() method.

    new_list = [10, 20, 30]
new_list.clear()
print(new_list)
OUTPUT:[]

    Using POP() method: You can remove the element at the specified index and get its value with pop().

    Note:

    • index starts with 0 (ZERO)
    • pop() method removes and returns the last item if the index is not provided.
    new_list = [10, 20, 30, 40, 50, 60, 100]
print(new_list.pop(0))
OUTPUT:10

    Using Remove() method:

    By using remove() method you can remove the first matching element from a list.

    new_list = [2, 9, 3, 5, 7, 9, 11]
new_list.remove(9)
print(new_list)
OUTPUT:[2, 3, 5, 7, 9, 11]

    By using del() method:

    You can delete the element using the del() method by specifying the index of the item.

    new_list = [0, 10, 20, 30, 40, 50]
del new_list[0]
print(new_list)
OUTPUT:[10, 20, 30, 40, 50]

    You can delete multiple values from a list using slice:

    new_list = [5, 10, 20, 30, 40, 50, 60, 70]
del new_list[2:5]
print(new_list)
OUTPUT:[5, 10, 50, 60, 70]
    See less
    • 0
  9. Asked: October 20, 2022In:

    Naming Convention python function

    sam

    Naming convention for python function: Use a lowercase word or words. Separate words by underscores to improve readability.

    Naming convention for python function:

    Use a lowercase word or words. Separate words by underscores to improve readability.

    See less
    • 0
  10. Asked: January 19, 2021In:

    What is a KT in IT companies?

    sam

    In school we have teachers to teach us about a particular subject/lesson when we are new to it. In colleges, we have professors who do the same. In the workplace, employees who clear the interview are trained to take up tasks in a particular field of technology. They will be allotted to particular pRead more

    In school we have teachers to teach us about a particular subject/lesson when we are new to it.

    In colleges, we have professors who do the same.

    In the workplace, employees who clear the interview are trained to take up tasks in a particular field of technology. They will be allotted to particular projects to take up tasks related to the technology.

    Every project has a specific manner in which the tasks are carried out. For example, in layman terms: If the technology is ‘Dal Cooking’: one individual may want the dal to be cooked raw and simply season it with salt; whereas another may like the dal to be pressure cooked along with the masala and seasoning done beforehand.

    So, the same dal may need to be cooked in different manners to suit the tastes of different individuals.

    That is exactly what a KT- Knowledge transition is.

    It may be taught directly by the maikin of the house; the client.

    It may be taught by the existing cooks who are leaving; the existing employees in the project who intend to move out.

    There is a specific procedure to be followed in each project which needs to be learnt thoroughly before starting work., the task of meting it out to the newcomers is called Knowledge transition-KT.

    See less
    • 0