python中有用的库（freegames、pysnooper）

深藏阁楼爱情的钟 2022-12-25 11:55 134阅读 0赞

#### 有趣的游戏库-freegames ####

1.  安装：pip install freegames
2.  查看库里面的游戏列表：python -m freegames list
3.  启动snake游戏：python -m freegames.snake
4.  复制snake.py源码到目录（命令行目录是哪就保存在哪）：python -m freegames copy snake

#### python调试神级工具-PySnooper ####

1.  安装：pip3 install pysnooper
2.  测试：

import pysnooper
    
    @pysnooper.snoop()
    def number_to_bits(number):
        if number:
            bits = []
            while number:
                number, remainder = divmod(number, 2)
                bits.insert(0, remainder)
            return bits
        else:
            return [0]
    
    number_to_bits(6)

执行结果如下：

/Users/cuiyonghua/opt/anaconda3/bin/python /Users/cuiyonghua/Desktop/my_work_files/codes/python_codes/com_test_codes/baiduhanyu/movie_test.py
    Source path:... /Users/cuiyonghua/Desktop/my_work_files/codes/python_codes/com_test_codes/baiduhanyu/movie_test.py
    Starting var:.. number = 6
    11:15:35.765448 call         4 def number_to_bits(number):
    11:15:35.766810 line         5     if number:
    11:15:35.766846 line         6         bits = []
    New var:....... bits = []
    11:15:35.766869 line         7         while number:
    11:15:35.766896 line         8             number, remainder = divmod(number, 2)
    Modified var:.. number = 3
    New var:....... remainder = 0
    11:15:35.766916 line         9             bits.insert(0, remainder)
    Modified var:.. bits = [0]
    11:15:35.766945 line         7         while number:
    11:15:35.766968 line         8             number, remainder = divmod(number, 2)
    Modified var:.. number = 1
    Modified var:.. remainder = 1
    11:15:35.766988 line         9             bits.insert(0, remainder)
    Modified var:.. bits = [1, 0]
    11:15:35.767013 line         7         while number:
    11:15:35.767035 line         8             number, remainder = divmod(number, 2)
    Modified var:.. number = 0
    11:15:35.767054 line         9             bits.insert(0, remainder)
    Modified var:.. bits = [1, 1, 0]
    11:15:35.767076 line         7         while number:
    11:15:35.767098 line        10         return bits
    11:15:35.767116 return      10         return bits
    Return value:.. [1, 1, 0]
    Elapsed time: 00:00:00.001712
    
    Process finished with exit code 0

1.  如果想输入文件中  
    如果标准错误输出难以获得，或者太长了，那么可以将输出定位到本地文件：

> @pysnooper.snoop(’/my/log/file.log’)

案例如下：

import pysnooper
    import random
    
    
    @pysnooper.snoop('file.log')
    def foo():
        lst = []
        for i in range(3):
            lst.append(random.randrange(1, 1000))
    
            lower = min(lst)
            upper = max(lst)
            mid = (lower + upper) / 2
            print(lower, mid, upper)
    
    
    foo()

1.  将所有 snoop 行以某个前缀开始，更容易定位和找到：

> @pysnooper.snoop(prefix=’@@@@@ ')