Python Script

核心语法

#!/usr/bin/python3

# 第一个注释

'''
注释
'''

print("Hello,Python!")

复杂项目

长期维护

str = input("please input:")
print()

echo "please input"
read str

if command:
	x
elif command2:
    y
else:

file = fopen("filename")
lines = file.read() 
# lines = file.readline() 只读一行
print(lines)

def function(parameters):
    "函数文档
    function_work
    return

import sys

import sys

print('Number of arguments:',len(sys.argv))
print('Argument list :',str(sys.argv))

输出结果：

python3 script-io.py 1 a
Number of arguments: 3
Argument list : ['script-io.py', '1', 'a']

with open('data.txt') as f:
    print(f.read())

with open('data.txt',mode='w') as f:
    f.write('this is the new content will write to the file')

>>> import os
>>> entries = os.listdir() # 当前目录
>>> entries 
['script-io.py', 'filename']