python學習：字典排序

標籤：template   get   operator   md5sum   modules   dir   os.path   for   imp   

按字典值排序 按照字典value排序，類似sort -k 命令 import operatorx= {1:2,3:4,4:3,2:1,0:0}sorted_x = sorted(x.iteritems(),key=operator.itemgetter(1))In [38]: sorted_xOut[38]: [(0, 0), (2, 1), (1, 2), (4, 3), (3, 4)]  sorted_y = sorted(x.iteritems(),key=operator.itemgetter(1),reverse=True) 找出佔用空間大的檔案 os.walkos.path.getsizedict sort(top10)  #!/usr/bin/env python import osimport sysimport operator def gen_dic(topdir):    dic = {}    a = os.walk(topdir)    for p, d, f in a:        for i in f:            fn = os.path.join(p, i)            f_size = os.path.getsize(fn)            dic[fn] = f_size    return dic if __name__ == ‘__main__‘:    dic =  gen_dic(sys.argv[1])    sorted_dic = sorted(dic.iteritems(), key=operator.itemgetter(1),reverse=True)    for k, v in sorted_dic[:10]:        print k, ‘---->‘,v [[email protected] day2]# python 4_top10.py ../2_walk.py ----> 781./3_dup.py ----> 727./4_top10.py ----> 484./1_md5sum.py ----> 421./3_yield.py ----> 127./test/a ----> 0./test/b ----> 0  [[email protected] day2]# python 4_top10.py /etc/etc/selinux/targeted/policy/policy.24 ----> 8377047/etc/selinux/targeted/modules/active/policy.kern ----> 8377047/etc/pki/tls/certs/ca-bundle.trust.crt ----> 1066943/etc/pki/tls/cert.pem ----> 877042/etc/pki/tls/certs/ca-bundle.crt ----> 877042/etc/alternatives/libnssckbi.so.x86_64 ----> 709880/etc/services ----> 641020/etc/pki/ca-trust/extracted/openssl/ca-bundle.trust.crt ----> 359773/etc/selinux/targeted/modules/active/file_contexts.template ----> 296225/etc/selinux/targeted/modules/active/file_contexts ----> 290594   

python學習：字典排序