Day6 Python learns essays.

1. Serialization of

Tools have json,pickle.

Used to convert complex data types into strings.

#json必须是 the Key,value data type.

#pickle仅限python使用支持python大部分数据类型.

2. Log module

3. Execute the Command module

The relevant modules and functions that can execute shell commands are:

• Os.system

• os.spawn*

• os.popen*--Waste

• popen2.*--Waste

• commands.*-Discarded, removed in 3.x

The functions of the relevant modules and functions for executing shell commands are implemented in the Subprocess module and provide richer functionality.

Cases:

Pager

ret  = subprocess.call([ "ls" ,  "-l" ], shell = False ) #shell为False时使用python的接口执行命令，传递命令参数只能通过列表。

ret = subprocess.call("ls -l", shell=True) #shell为True时使用默认shell执行，传递命令参数采用字符串拼接的方式，列表和引号皆可使用。

3. Regular

Re

4. Time Module

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Day6 Python learns essays.