问题
I used to use the shebang
#!/usr/bin/env python
When is it better to use
#!/usr/bin/python
What is the exact difference between them?
回答1:
#!/usr/bin/python is hardcoded to always run /usr/bin/python, while #!/usr/bin/env python will run whichever python would be default in your current environment (it will take in account for example $PATH, you can check which python interpreter will be used with which python).
The second way ( #!/usr/bin/env python ) is preferred , as it's not dependent on particular installation. It will work for example with virtualenv setups or systems where there is no /usr/bin/python, but only e.g. /usr/local/bin/python.
来源：https://stackoverflow.com/questions/5709616/whats-the-difference-between-these-two-python-shebangs