ICode9

精准搜索请尝试: 精确搜索
首页 > 编程语言> 文章详细

通过import keyword查看python中定义的关键字

2022-01-14 16:34:14  阅读:315  来源: 互联网

标签:__ fp keyword format python args keywords import


  • 输入命令 keyword.kwlist
  • 可以查看这个keyword.py的源代码,挺短的但借鉴意义挺强的,也算是学习规范书写python的一个方式
#! /usr/bin/env python3

"""Keywords (from "graminit.c")

This file is automatically generated; please don't muck it up!

To update the symbols in this file, 'cd' to the top directory of
the python source tree after building the interpreter and run:

    ./python Lib/keyword.py
"""

__all__ = ["iskeyword", "kwlist"]

kwlist = [
#--start keywords--
        'False',
        'None',
        'True',
        'and',
        'as',
        'assert',
        'break',
        'class',
        'continue',
        'def',
        'del',
        'elif',
        'else',
        'except',
        'finally',
        'for',
        'from',
        'global',
        'if',
        'import',
        'in',
        'is',
        'lambda',
        'nonlocal',
        'not',
        'or',
        'pass',
        'raise',
        'return',
        'try',
        'while',
        'with',
        'yield',
#--end keywords--
        ]

iskeyword = frozenset(kwlist).__contains__

def main():
    import sys, re

    args = sys.argv[1:]
    iptfile = args and args[0] or "Python/graminit.c"
    if len(args) > 1: optfile = args[1]
    else: optfile = "Lib/keyword.py"

    # load the output skeleton from the target, taking care to preserve its
    # newline convention.
    with open(optfile, newline='') as fp:
        format = fp.readlines()
    nl = format[0][len(format[0].strip()):] if format else '\n'

    # scan the source file for keywords
    with open(iptfile) as fp:
        strprog = re.compile('"([^"]+)"')
        lines = []
        for line in fp:
            if '{1, "' in line:
                match = strprog.search(line)
                if match:
                    lines.append("        '" + match.group(1) + "'," + nl)
    lines.sort()

    # insert the lines of keywords into the skeleton
    try:
        start = format.index("#--start keywords--" + nl) + 1
        end = format.index("#--end keywords--" + nl)
        format[start:end] = lines
    except ValueError:
        sys.stderr.write("target does not contain format markers\n")
        sys.exit(1)

    # write the output file
    with open(optfile, 'w', newline='') as fp:
        fp.writelines(format)

if __name__ == "__main__":
    main()

标签:__,fp,keyword,format,python,args,keywords,import
来源: https://blog.csdn.net/xiong_xin/article/details/122496974

本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享;
2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关;
3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关;
4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除;
5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。

专注分享技术,共同学习,共同进步。侵权联系[81616952@qq.com]

Copyright (C)ICode9.com, All Rights Reserved.

ICode9版权所有