


Inventory of 12 variables in the sys library of the Python programming language
1. Concept
This is a standard library closely related to the Python interpreter.
import sys print sys.__doc__
shows the basic documentation of sys. Look at the first sentence, which summarizes the basic features of this module.
2. sys variables
1. argv
sys.argv is a variable, specially used to pass parameters to the Python interpreter, so it is called "command line parameter".
Method: sys.argvReturn value: list
import sys print(sys.argv) #该方法返回的列表中第一个元素为程序的路径,会把执行参数传入到列表中
2. path
The search path of the module.
print(sys.path)
The first path in the list represents the current path.
3. modules
模块路径字典。
print(sys.modules) #该方法返回一个字典,模块名为key,模块路径为value
4. executable
可执行的二进制文件的绝对路径。
print(sys.executable)
5. float_info
浮点信息的结构
print(sys.float_info) #返回浮点信息的限定范围
6. floatreprstyle
字符串表示浮点的repr方法。
print(sys.float_repr_style)
7. maxsize
最大支持的长度。
print(sys.maxsize)
8. maxunicode
最大编码点
print(sys.maxunicode)
9. platform
平台标识符
print(sys.platform)
结果为windows64位的操作系统。
10. prefix
python库
print(sys.prefix) #返回的是python库的路径
11. thread_info
线程的实现信息
print(sys.thread_info) #该变量的使用同float_info类似
12. version
Python当前版本。
print(sys.version)
三、总结
本文基于Python基础,介绍了sys模块,介绍了12个sys的变量。对每个变量都采用图文结合的方式,进行详细的讲解。
The above is the detailed content of Inventory of 12 variables in the sys library of the Python programming language. For more information, please follow other related articles on the PHP Chinese website!

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