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files >> //proc/thread-self/root/proc/self/root/proc/self/root/usr/lib64/python2.7/Demo/scripts/pp.py
#! /usr/bin/python2.7 # Emulate some Perl command line options. # Usage: pp [-a] [-c] [-d] [-e scriptline] [-F fieldsep] [-n] [-p] [file] ... # Where the options mean the following: # -a : together with -n or -p, splits each line into list F # -c : check syntax only, do not execute any code # -d : run the script under the debugger, pdb # -e scriptline : gives one line of the Python script; may be repeated # -F fieldsep : sets the field separator for the -a option [not in Perl] # -n : runs the script for each line of input # -p : prints the line after the script has run # When no script lines have been passed, the first file argument # contains the script. With -n or -p, the remaining arguments are # read as input to the script, line by line. If a file is '-' # or missing, standard input is read. # XXX To do: # - add -i extension option (change files in place) # - make a single loop over the files and lines (changes effect of 'break')? # - add an option to specify the record separator # - except for -n/-p, run directly from the file if at all possible import sys import getopt FS = '' SCRIPT = [] AFLAG = 0 CFLAG = 0 DFLAG = 0 NFLAG = 0 PFLAG = 0 try: optlist, ARGS = getopt.getopt(sys.argv[1:], 'acde:F:np') except getopt.error, msg: sys.stderr.write('%s: %s\n' % (sys.argv[0], msg)) sys.exit(2) for option, optarg in optlist: if option == '-a': AFLAG = 1 elif option == '-c': CFLAG = 1 elif option == '-d': DFLAG = 1 elif option == '-e': for line in optarg.split('\n'): SCRIPT.append(line) elif option == '-F': FS = optarg elif option == '-n': NFLAG = 1 PFLAG = 0 elif option == '-p': NFLAG = 1 PFLAG = 1 else: print option, 'not recognized???' if not ARGS: ARGS.append('-') if not SCRIPT: if ARGS[0] == '-': fp = sys.stdin else: fp = open(ARGS[0], 'r') while 1: line = fp.readline() if not line: break SCRIPT.append(line[:-1]) del fp del ARGS[0] if not ARGS: ARGS.append('-') if CFLAG: prologue = ['if 0:'] epilogue = [] elif NFLAG: # Note that it is on purpose that AFLAG and PFLAG are # tested dynamically each time through the loop prologue = [ 'LINECOUNT = 0', 'for FILE in ARGS:', ' \tif FILE == \'-\':', ' \t \tFP = sys.stdin', ' \telse:', ' \t \tFP = open(FILE, \'r\')', ' \tLINENO = 0', ' \twhile 1:', ' \t \tLINE = FP.readline()', ' \t \tif not LINE: break', ' \t \tLINENO = LINENO + 1', ' \t \tLINECOUNT = LINECOUNT + 1', ' \t \tL = LINE[:-1]', ' \t \taflag = AFLAG', ' \t \tif aflag:', ' \t \t \tif FS: F = L.split(FS)', ' \t \t \telse: F = L.split()' ] epilogue = [ ' \t \tif not PFLAG: continue', ' \t \tif aflag:', ' \t \t \tif FS: print FS.join(F)', ' \t \t \telse: print \' \'.join(F)', ' \t \telse: print L', ] else: prologue = ['if 1:'] epilogue = [] # Note that we indent using tabs only, so that any indentation style # used in 'command' will come out right after re-indentation. program = '\n'.join(prologue) + '\n' for line in SCRIPT: program += ' \t \t' + line + '\n' program += '\n'.join(epilogue) + '\n' import tempfile fp = tempfile.NamedTemporaryFile() fp.write(program) fp.flush() if DFLAG: import pdb pdb.run('execfile(%r)' % (fp.name,)) else: execfile(fp.name)
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