用于解答算法题目的Python3代码框架

摘要：代码于是我就利用的代码片段功能编写了一个用于处理这些输入输出的代码框架，并加入了测试功能写函数前先写测试时正确的事情。

最近在实习，任务并不是很重，就利用闲暇时间使用Python3在PAT网站上刷题，并致力于使用Python3的特性和函数式编程的理念，其中大部分题目都有着类似的输入输出格式，例如一行读入若干个数字，字符串，每行输出多少个字符串等等，所以产生了很多重复的代码。

于是我就利用VS Code的代码片段功能编写了一个用于处理这些输入输出的代码框架，并加入了测试功能（写函数前先写测试时正确的事情）。代码如下

"""Simple Console Program With Data Input And Output."""
import sys
import io


def read_int():
    """Read a seris of numbers."""
    return list(map(int, sys.stdin.readline().split()))


def test_read_int():
    """Test the read_int function"""
    test_file = io.StringIO("1 2 3
")
    sys.stdin = test_file
    assert read_int() == [1, 2, 3], "read_int error"


def read_float():
    """Read a seris of float numbers."""
    return list(map(float, sys.stdin.readline().split()))


def test_read_float():
    """Test the read_float function"""
    test_file = io.StringIO("1 2 3
")
    sys.stdin = test_file
    assert read_float() == [1.0, 2.0, 3.0], "read_float error"


def read_word():
    """Read a seris of string."""
    return list(map(str, sys.stdin.readline().split()))


def test_read_word():
    """Test the read_word function"""
    test_file = io.StringIO("1 2 3
")
    sys.stdin = test_file
    assert read_word() == ["1", "2", "3"], "read_word error"


def combine_with(seq, sep=" ", num=None):
    """Combine list enum with a character and return the string object"""
    res = sep.join(list(map(str, seq)))
    if num is not None:
        res = str(seq[0])
        for element in range(1, len(seq)):
            res += sep + 
                str(seq[element]) if element % num != 0 else "
" + 
                str(seq[element])
    return res


def test_combile_with():
    """Test the combile_with function."""
    assert combine_with([1, 2, 3, 4, 5], "*", 2) == """1*2
3*4
5""", "combine_with error."


def main():
    """The main function."""
    pass


if __name__ == "__main__":
    sys.exit(int(main() or 0))

添加到VS Code的默认代码片段的操作大致如下：

文件->首选项->用户代码片段，选择Python

编辑"python.json"文件如以下内容

{
/*
     // Place your snippets for Python here. Each snippet is defined under a snippet name and has a prefix, body and 
     // description. The prefix is what is used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
     // $1, $2 for tab stops, ${id} and ${id:label} and ${1:label} for variables. Variables with the same id are connected.
     // Example:
     "Print to console": {
        "prefix": "log",
        "body": [
            "console.log("$1");",
            "$2"
        ],
        "description": "Log output to console"
    }
*/
 "Simple Console Program With Data Input And Output": {
        "prefix": "simple",
        "body": [""""Simple Console Program With Data Input And Output."""
import sys

def read_int():
    """Read a seris of numbers."""
    return list(map(int, sys.stdin.readline().split()))


def read_float():
    """Read a seris of float numbers."""
    return list(map(float, sys.stdin.readline().split()))


def read_word():
    """Read a seris of string."""
    return list(map(str, sys.stdin.readline().split()))


def combine_with(seq, sep=" ", num=None):
    """Combine list enum with a character and return the string object"""
    res = sep.join(list(map(str, seq)))
    if num is not None:
        res = str(seq[0])
        for element in range(1, len(seq)):
            res += sep + str(seq[element]) if element % num != 0 else "
" + str(seq[element])
    return res


def main():
    """The main function."""
    pass


if __name__ == "__main__":
    sys.exit(int(main() or 0))
"
        ],
        "description": "Simple Console Program With Data Input And Output"
    }
}```
 然后再编写Python代码的时候，键入"simple"就可以自动输入以上模板。

![](https://static.oschina.net/uploads/img/201608/04182804_9GZn.png "在这里输入图片标题")
# 总结