第一课 Python print 打印

1.创建文件123.py

$ vim 123.py

2.执行文件 python 123.py

$ python 123.py
213213213
Hello xu bin

3.创建快捷执行./123.py (chmod +x 123.py)

$ ./123.py
-bash: ./123.py: Permission denied
$ chmod +x 123.py
$ ./123.py
./123.py: line 1: syntax error near unexpected token `"213213213"'
./123.py: line 1: `print("213213213")'

4.声明python文件解读语言

#! /usr/bin/env python3  //查找整个系统中的python3

vim打开

#! /usr/bin/env python3
print("213213213")
print("Hello xu bin")

保存退出重新执行

$ ./123.py
213213213
Hello xu bin