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      1 #! /usr/bin/env python3
      2 
      3 """Keywords (from "graminit.c")
      4 
      5 This file is automatically generated; please don't muck it up!
      6 
      7 To update the symbols in this file, 'cd' to the top directory of
      8 the python source tree after building the interpreter and run:
      9 
     10     ./python Lib/keyword.py
     11 """
     12 
     13 __all__ = ["iskeyword", "kwlist"]
     14 
     15 kwlist = [
     16 #--start keywords--
     17         'False',
     18         'None',
     19         'True',
     20         'and',
     21         'as',
     22         'assert',
     23         'async',
     24         'await',
     25         'break',
     26         'class',
     27         'continue',
     28         'def',
     29         'del',
     30         'elif',
     31         'else',
     32         'except',
     33         'finally',
     34         'for',
     35         'from',
     36         'global',
     37         'if',
     38         'import',
     39         'in',
     40         'is',
     41         'lambda',
     42         'nonlocal',
     43         'not',
     44         'or',
     45         'pass',
     46         'raise',
     47         'return',
     48         'try',
     49         'while',
     50         'with',
     51         'yield',
     52 #--end keywords--
     53         ]
     54 
     55 iskeyword = frozenset(kwlist).__contains__
     56 
     57 def main():
     58     import sys, re
     59 
     60     args = sys.argv[1:]
     61     iptfile = args and args[0] or "Python/graminit.c"
     62     if len(args) > 1: optfile = args[1]
     63     else: optfile = "Lib/keyword.py"
     64 
     65     # load the output skeleton from the target, taking care to preserve its
     66     # newline convention.
     67     with open(optfile, newline='') as fp:
     68         format = fp.readlines()
     69     nl = format[0][len(format[0].strip()):] if format else '\n'
     70 
     71     # scan the source file for keywords
     72     with open(iptfile) as fp:
     73         strprog = re.compile('"([^"]+)"')
     74         lines = []
     75         for line in fp:
     76             if '{1, "' in line:
     77                 match = strprog.search(line)
     78                 if match:
     79                     lines.append("        '" + match.group(1) + "'," + nl)
     80     lines.sort()
     81 
     82     # insert the lines of keywords into the skeleton
     83     try:
     84         start = format.index("#--start keywords--" + nl) + 1
     85         end = format.index("#--end keywords--" + nl)
     86         format[start:end] = lines
     87     except ValueError:
     88         sys.stderr.write("target does not contain format markers\n")
     89         sys.exit(1)
     90 
     91     # write the output file
     92     with open(optfile, 'w', newline='') as fp:
     93         fp.writelines(format)
     94 
     95 if __name__ == "__main__":
     96     main()
     97