mirror of
https://github.com/python/cpython.git
synced 2025-10-31 02:15:10 +00:00
50 lines
1.2 KiB
Python
Executable file
50 lines
1.2 KiB
Python
Executable file
#! /usr/bin/env python
|
|
|
|
# 2) Sorting Test
|
|
#
|
|
# Sort an input file that consists of lines like this
|
|
#
|
|
# var1=23 other=14 ditto=23 fred=2
|
|
#
|
|
# such that each output line is sorted WRT to the number. Order
|
|
# of output lines does not change. Resolve collisions using the
|
|
# variable name. e.g.
|
|
#
|
|
# fred=2 other=14 ditto=23 var1=23
|
|
#
|
|
# Lines may be up to several kilobytes in length and contain
|
|
# zillions of variables.
|
|
|
|
# This implementation:
|
|
# - Reads stdin, writes stdout
|
|
# - Uses any amount of whitespace to separate fields
|
|
# - Allows signed numbers
|
|
# - Treats illegally formatted fields as field=0
|
|
# - Outputs the sorted fields with exactly one space between them
|
|
# - Handles blank input lines correctly
|
|
|
|
import regex
|
|
import string
|
|
import sys
|
|
|
|
def main():
|
|
prog = regex.compile('^\(.*\)=\([-+]?[0-9]+\)')
|
|
def makekey(item, prog=prog):
|
|
if prog.match(item) >= 0:
|
|
var, num = prog.group(1, 2)
|
|
return string.atoi(num), var
|
|
else:
|
|
# Bad input -- pretend it's a var with value 0
|
|
return 0, item
|
|
while 1:
|
|
line = sys.stdin.readline()
|
|
if not line:
|
|
break
|
|
items = string.split(line)
|
|
items = map(makekey, items)
|
|
items.sort()
|
|
for num, var in items:
|
|
print "%s=%s" % (var, num),
|
|
print
|
|
|
|
main()
|