Python version change

[saisankalpj]

I have written Python code in Python 2.7.14 version and now i am asked to change to 3.6 version.
My queries:

1.will I be able to run the same code it python 3.6 with minimal changes?
2.Do libraries also vary in 3.6 from those used in python 2.7.14??
3.will the import statements like "from ABC import xyz" also vary from both these versions

[buran]

1.will I be able to run the same code it python 3.6 with minimal changes?

it's difficult to say without seeing actual code

2.Do libraries also vary in 3.6 from those used in python 2.7.14??

again - there are differences, but if your code is affected depends. it's difficult to say without seeing actual code.

3.will the import statements like "from ABC import xyz" also vary from both these versions

depends if your code uses libraries that has changed. For example its Tkinter in python 2, but tkinter in python3.

There is 2to3 tool that can help with the convertion

[snippsat]

As mention bye @buran use 2to3.py that comes with python.

# greet.py
# Python 2.7
def greet(name):
    return("Hello, {}!".format(name))

name = raw_input("What's your name? ")
print 'Hello {}'.format(greet(name)

From command line:

C:\Python37\Tools\scripts
λ python 2to3.py -w greet.py

After Python 3 code:

# greet.py
# Python 3.7
def greet(name):
    return("Hello, {}!".format(name))

name = input("What's your name? ")
print('Hello {}'.format(greet(name)))

[saisankalpj]

As mention bye @buran use 2to3.py that comes with python.

# greet.py # Python 2.7 def greet(name): return("Hello, {}!".format(name)) name = raw_input("What's your name? ") print 'Hello {}'.format(greet(name)

From command line:

C:\Python37\Tools\scripts λ python 2to3.py -w greet.py

After Python 3 code:

# greet.py # Python 3.7 def greet(name): return("Hello, {}!".format(name)) name = input("What's your name? ") print('Hello {}'.format(greet(name)))

Will the 2to3 library solve the entire issue automatically, or will i have to make some changes manually too apart from what changes the 2 to 3library makes.
Will the 2 to 3 tool also convert the ‘libraries of 2’ to the libraries of 3 automatically

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1.will I be able to run the same code it python 3.6 with minimal changes?

it's difficult to say without seeing actual code

2.Do libraries also vary in 3.6 from those used in python 2.7.14??

again - there are differences, but if your code is affected depends. it's difficult to say without seeing actual code.

3.will the import statements like "from ABC import xyz" also vary from both these versions

depends if your code uses libraries that has changed. For example its Tkinter in python 2, but tkinter in python3. There is 2to3 tool that can help with the convertion

Will the 2to3 library solve the entire issue automatically, or will i have to make some changes manually too apart from what changes the 2 to 3library makes.
Will the 2 to 3 tool also convert the ‘libraries of 2’ to the libraries of 3 automatically

[buran]

run 2to3 tool and will get your answer

from the docs

Sometimes 2to3 will find a place in your source code that needs to be changed, but 2to3 cannot fix automatically. In this case, 2to3 will print a warning beneath the diff for a file. You should address the warning in order to have compliant 3.x code.

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Will the 2 to 3 tool also convert the ‘libraries of 2’ to the libraries of 3 automatically

what do you mean by that?