linux set python 3 as default
1. Check current version:
$ python --version
2. get root permissions:
$ sudo su
3. set python3 as default:
$ update-alternatives --install /usr/bin/python python /usr/bin/python3 1
4. Done. (Check by $ python --version)linux set python 3 as default
1. Check current version:
$ python --version
2. get root permissions:
$ sudo su
3. set python3 as default:
$ update-alternatives --install /usr/bin/python python /usr/bin/python3 1
4. Done. (Check by $ python --version)update link python is python 3
$ python --version
Python 2.7.6
$ python3 --version
Python 3.4.3
$ alias python=python3
$ python --version
Python 3.4.3set default python
newDict = {1:"One",
2:"Two",
3:"Three"}
x=newDict.setdefault(4,"Four")
print(newDict[4])
#returns Four
newDict2 = {1:"One",
2:"Two",
3:"Three",
"Hello":"World"}
y=newDict.setdefault("Hello","Yellow")
print(newDict2["Hello"])
#returns World
dict1 = {1:"One",2:"Two"}
x=dict1.setdefault(3,"Three")
x=dict1.setdefault(2,"Duo")
print(dict1)
#prints {1: 'One', 2: 'Two', 3: 'Three'}
#Therefore if value doesn't exist it is given default value, else value of key is returned.transition from python 2 to 3 terminal
alias python="python3"update link python is python 3
$ python --version
Python 2.7.6update link python is python 3
$ command python --version
Python 2.7.6Copyright © 2021 Codeinu
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