Python Script:
1. Add some lines into a blank file:
echo "hello world" >> text.txt.
Everytime before create a script file. we have some steps:
a. Create a .script file by using mkdir text.script
b. add some lines into the script to make sure the file is allowed to run under the shell:
echo 'if __name__ == "__main__":\n print("Welcome to a Python script")' > script.py # here we are using single bracket on each side of echo word.Pay attention that there are four space before print.
2. We can use python2 to call the script:
python text.script
Or use python3 to call the script:
python3 text.script
Here, we can use python3 or python2 to call the script. But sometimes, if several project want to call a same library in different version.
3. Why we want to use virtual environment:
So if we use virtual environment:
